java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:18:59,812 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:18:59,814 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:18:59,827 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:18:59,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:18:59,828 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:18:59,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:18:59,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:18:59,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:18:59,833 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:18:59,834 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:18:59,859 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:18:59,873 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:18:59,874 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:18:59,875 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:18:59,875 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:18:59,876 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:18:59,876 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:18:59,876 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:18:59,876 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:18:59,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:18:59,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:18:59,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:18:59,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:18:59,960 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:18:59,961 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-07-23 15:18:59,961 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-07-23 15:19:00,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:19:00,018 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:19:00,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:19:00,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:19:00,020 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:19:00,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:19:00,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:19:00,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:19:00,063 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:19:00,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/1) ... [2018-07-23 15:19:00,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-23 15:19:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:19:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:19:00,283 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:19:00,284 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:00 BoogieIcfgContainer [2018-07-23 15:19:00,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:19:00,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:19:00,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:19:00,289 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:19:00,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:00" (1/2) ... [2018-07-23 15:19:00,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4008370e and model type count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:19:00, skipping insertion in model container [2018-07-23 15:19:00,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:00" (2/2) ... [2018-07-23 15:19:00,294 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-07-23 15:19:00,304 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:19:00,312 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:19:00,361 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:19:00,362 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:19:00,362 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:19:00,362 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:19:00,363 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:19:00,363 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:19:00,363 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:19:00,363 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:19:00,363 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:19:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:19:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:19:00,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,388 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:19:00,389 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-07-23 15:19:00,402 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,470 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:00,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:19:00,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:19:00,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:19:00,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:00,495 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 15:19:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,532 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-07-23 15:19:00,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:19:00,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:19:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,546 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:19:00,546 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 15:19:00,550 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 15:19:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 15:19:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:19:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:19:00,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 15:19:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,588 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:19:00,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:19:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:19:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:19:00,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,590 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:19:00,590 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-07-23 15:19:00,591 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:19:00,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:19:00,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:19:00,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:00,620 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 15:19:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,641 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 15:19:00,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:19:00,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:19:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,642 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:19:00,642 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:19:00,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:19:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:19:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:19:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:19:00,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 15:19:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,647 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:19:00,647 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:19:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:19:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:19:00,648 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,648 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:19:00,648 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-07-23 15:19:00,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,687 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,687 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:19:00,687 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:19:00,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:19:00,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:00,688 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-23 15:19:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,708 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:19:00,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:19:00,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-23 15:19:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,709 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:19:00,709 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:19:00,710 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:19:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:19:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:19:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:19:00,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 15:19:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,717 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:19:00,717 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:19:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:19:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:19:00,718 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,718 INFO L353 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-23 15:19:00,718 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-07-23 15:19:00,719 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,770 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,770 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:00,770 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:00,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:00,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:00,771 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 15:19:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,813 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:19:00,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:00,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 15:19:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,818 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:19:00,818 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:19:00,819 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:19:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:19:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:19:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:19:00,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 15:19:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,826 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:19:00,827 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:19:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:19:00,828 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,828 INFO L353 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-07-23 15:19:00,828 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-07-23 15:19:00,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,881 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:19:00,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:19:00,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:19:00,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:00,883 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-23 15:19:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,907 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:19:00,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:19:00,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-23 15:19:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,908 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:19:00,909 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:19:00,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:19:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:19:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:19:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:19:00,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-23 15:19:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,918 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:19:00,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:19:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:19:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:19:00,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,919 INFO L353 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-07-23 15:19:00,919 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-07-23 15:19:00,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,969 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,969 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:19:00,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:19:00,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:19:00,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:00,971 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-07-23 15:19:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:00,992 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:19:00,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:19:00,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-07-23 15:19:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:00,993 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:19:00,993 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:19:00,994 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:19:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:19:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:19:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:19:00,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-23 15:19:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:00,998 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:19:00,998 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:19:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:19:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:19:00,999 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:00,999 INFO L353 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-07-23 15:19:00,999 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-07-23 15:19:01,000 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,065 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,065 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:19:01,066 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:19:01,066 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:19:01,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:01,067 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-07-23 15:19:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,088 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:19:01,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:19:01,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-07-23 15:19:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,090 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:19:01,090 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:19:01,091 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:19:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:19:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:19:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:19:01,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-23 15:19:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,095 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:19:01,095 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:19:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:19:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:19:01,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,096 INFO L353 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-07-23 15:19:01,097 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-07-23 15:19:01,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,164 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,165 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:19:01,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:19:01,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:19:01,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:01,166 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-07-23 15:19:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,199 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:19:01,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:19:01,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-07-23 15:19:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,200 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:19:01,203 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:19:01,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:19:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 15:19:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:19:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:19:01,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-23 15:19:01,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,212 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:19:01,212 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:19:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:19:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:19:01,213 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,213 INFO L353 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-07-23 15:19:01,214 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-07-23 15:19:01,215 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:19:01,289 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:19:01,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:19:01,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:01,290 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-07-23 15:19:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,341 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:19:01,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:19:01,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-07-23 15:19:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,343 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:19:01,343 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:19:01,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:19:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:19:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:19:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:19:01,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-07-23 15:19:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,355 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:19:01,355 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:19:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:19:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:19:01,357 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,357 INFO L353 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-07-23 15:19:01,357 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-07-23 15:19:01,358 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,446 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,446 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:19:01,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:19:01,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:19:01,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:01,450 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-07-23 15:19:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,491 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:19:01,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:19:01,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-07-23 15:19:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,492 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:19:01,495 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:19:01,496 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:19:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:19:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:19:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:19:01,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-07-23 15:19:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,506 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:19:01,506 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:19:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:19:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:19:01,509 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,509 INFO L353 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-07-23 15:19:01,509 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-07-23 15:19:01,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,603 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:19:01,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:19:01,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:19:01,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:01,604 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-07-23 15:19:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,641 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:19:01,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:19:01,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-07-23 15:19:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,647 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:19:01,647 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:19:01,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:19:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:19:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:19:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:19:01,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-07-23 15:19:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,656 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:19:01,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:19:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:19:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:19:01,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,657 INFO L353 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-07-23 15:19:01,658 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-07-23 15:19:01,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,725 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,725 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:19:01,725 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:19:01,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:19:01,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:01,726 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-07-23 15:19:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,750 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:19:01,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:19:01,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-07-23 15:19:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,751 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:19:01,751 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:19:01,752 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:19:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:19:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:19:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:19:01,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-07-23 15:19:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,761 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:19:01,761 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:19:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:19:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:19:01,762 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,762 INFO L353 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-07-23 15:19:01,765 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,766 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-07-23 15:19:01,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,852 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:19:01,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:19:01,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:19:01,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:01,854 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-07-23 15:19:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,876 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:19:01,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:19:01,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-07-23 15:19:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,877 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:19:01,877 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:19:01,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:19:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:19:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:19:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:19:01,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-07-23 15:19:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,883 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:19:01,883 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:19:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:19:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:19:01,884 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,884 INFO L353 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-07-23 15:19:01,885 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-07-23 15:19:01,885 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:01,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:01,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:19:01,944 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:19:01,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:19:01,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:01,953 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-07-23 15:19:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:01,976 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:19:01,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:19:01,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-07-23 15:19:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:01,985 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:19:01,985 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 15:19:01,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 15:19:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 15:19:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:19:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:19:01,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-07-23 15:19:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:01,992 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:19:01,993 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:19:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:19:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:19:01,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:01,994 INFO L353 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-07-23 15:19:01,995 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-07-23 15:19:01,995 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,069 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:19:02,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:19:02,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:19:02,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:02,072 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-07-23 15:19:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,094 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:19:02,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:19:02,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-07-23 15:19:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,099 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:19:02,099 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:19:02,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:19:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:19:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:19:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:19:02,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-07-23 15:19:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,110 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:19:02,110 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:19:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:19:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:19:02,112 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,113 INFO L353 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-07-23 15:19:02,113 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-07-23 15:19:02,113 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,194 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:19:02,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:19:02,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:19:02,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:02,196 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-07-23 15:19:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,223 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:19:02,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:19:02,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-07-23 15:19:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,225 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:19:02,225 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 15:19:02,226 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 15:19:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 15:19:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:19:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:19:02,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-07-23 15:19:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,235 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:19:02,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:19:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:19:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:19:02,237 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,237 INFO L353 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-07-23 15:19:02,237 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-07-23 15:19:02,238 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,319 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,319 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:19:02,320 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:19:02,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:19:02,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:02,321 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-07-23 15:19:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,344 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:19:02,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:19:02,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-07-23 15:19:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,345 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:19:02,346 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:19:02,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:19:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:19:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:19:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:19:02,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-07-23 15:19:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,357 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:19:02,358 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:19:02,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:19:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:19:02,360 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,360 INFO L353 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-07-23 15:19:02,360 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-07-23 15:19:02,361 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,448 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,448 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:19:02,449 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:19:02,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:19:02,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:02,450 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-07-23 15:19:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,475 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:19:02,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:19:02,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-07-23 15:19:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,476 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:19:02,476 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:19:02,477 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:19:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:19:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:19:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:19:02,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-07-23 15:19:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,492 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:19:02,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:19:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:19:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:19:02,493 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,493 INFO L353 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-07-23 15:19:02,493 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-07-23 15:19:02,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,580 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:19:02,581 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:19:02,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:19:02,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:02,582 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-07-23 15:19:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,598 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:19:02,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:19:02,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-07-23 15:19:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,599 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:19:02,599 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:19:02,600 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:19:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:19:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:19:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:19:02,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-07-23 15:19:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,604 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:19:02,605 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:19:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:19:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:19:02,606 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,606 INFO L353 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-07-23 15:19:02,606 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-07-23 15:19:02,606 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,689 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,690 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:19:02,690 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:19:02,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:19:02,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:02,691 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-07-23 15:19:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,712 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:19:02,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:19:02,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-07-23 15:19:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,713 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:19:02,713 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 15:19:02,714 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 15:19:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 15:19:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:19:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:19:02,718 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-07-23 15:19:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,718 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:19:02,718 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:19:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:19:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:19:02,719 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,719 INFO L353 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-07-23 15:19:02,720 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-07-23 15:19:02,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:19:02,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:19:02,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:19:02,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:02,817 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-07-23 15:19:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,841 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:19:02,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:19:02,842 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-07-23 15:19:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:02,843 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:19:02,843 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:19:02,843 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:19:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:19:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:19:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:19:02,850 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-07-23 15:19:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:02,850 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:19:02,850 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:19:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:19:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:19:02,851 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:02,851 INFO L353 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-07-23 15:19:02,851 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-07-23 15:19:02,852 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:02,963 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:02,963 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:19:02,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:19:02,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:19:02,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:02,964 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-07-23 15:19:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:02,996 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 15:19:02,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:19:02,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-07-23 15:19:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,002 INFO L225 Difference]: With dead ends: 28 [2018-07-23 15:19:03,002 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 15:19:03,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 15:19:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-23 15:19:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:19:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:19:03,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-07-23 15:19:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,015 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:19:03,017 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:19:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:19:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:19:03,018 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,019 INFO L353 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-07-23 15:19:03,019 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-07-23 15:19:03,020 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:19:03,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:19:03,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:19:03,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:03,138 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-07-23 15:19:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:03,173 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:19:03,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:19:03,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-07-23 15:19:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,174 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:19:03,174 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:19:03,175 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:19:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:19:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:19:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:19:03,183 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-07-23 15:19:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,183 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:19:03,184 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:19:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:19:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:19:03,186 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,186 INFO L353 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-07-23 15:19:03,186 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-07-23 15:19:03,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,297 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:19:03,298 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:19:03,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:19:03,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:03,303 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-07-23 15:19:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:03,329 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-23 15:19:03,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:19:03,329 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-07-23 15:19:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,330 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:19:03,330 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:19:03,331 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:19:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:19:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:19:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:19:03,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-07-23 15:19:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,338 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:19:03,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:19:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:19:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:19:03,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,339 INFO L353 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-07-23 15:19:03,341 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-07-23 15:19:03,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,458 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,459 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:19:03,459 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:19:03,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:19:03,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:03,460 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-07-23 15:19:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:03,487 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:19:03,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:19:03,487 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-07-23 15:19:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,488 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:19:03,488 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:19:03,489 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:19:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:19:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:19:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:19:03,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-07-23 15:19:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,494 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:19:03,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:19:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:19:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:19:03,495 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,499 INFO L353 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-07-23 15:19:03,499 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-07-23 15:19:03,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,622 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,622 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:19:03,623 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:19:03,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:19:03,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:03,624 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-07-23 15:19:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:03,649 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-23 15:19:03,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:19:03,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-07-23 15:19:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,651 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:19:03,651 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 15:19:03,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 15:19:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 15:19:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:19:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:19:03,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-07-23 15:19:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,656 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:19:03,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:19:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:19:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:19:03,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,657 INFO L353 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-07-23 15:19:03,657 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-07-23 15:19:03,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:19:03,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:19:03,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:19:03,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:03,810 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-07-23 15:19:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:03,840 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:19:03,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:19:03,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-07-23 15:19:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:03,841 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:19:03,841 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:19:03,842 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:19:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:19:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:19:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:19:03,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-07-23 15:19:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:03,848 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:19:03,848 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:19:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:19:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:19:03,849 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:03,849 INFO L353 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-07-23 15:19:03,849 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-07-23 15:19:03,850 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:03,986 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:03,986 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:19:03,987 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:19:03,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:19:03,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:03,988 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-07-23 15:19:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:04,016 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 15:19:04,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:19:04,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-07-23 15:19:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:04,017 INFO L225 Difference]: With dead ends: 34 [2018-07-23 15:19:04,017 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:19:04,017 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:19:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:19:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:19:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:19:04,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-07-23 15:19:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:04,027 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:19:04,027 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:19:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:19:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:19:04,028 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:04,028 INFO L353 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-07-23 15:19:04,028 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-07-23 15:19:04,030 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:04,177 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:04,177 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:19:04,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:19:04,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:19:04,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:04,179 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-07-23 15:19:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:04,201 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:19:04,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:19:04,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-07-23 15:19:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:04,202 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:19:04,203 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:19:04,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:19:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:19:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:19:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:19:04,208 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-07-23 15:19:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:04,208 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:19:04,208 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:19:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:19:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:19:04,209 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:04,209 INFO L353 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-07-23 15:19:04,209 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-07-23 15:19:04,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:04,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:04,360 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:19:04,360 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:19:04,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:19:04,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:04,361 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-07-23 15:19:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:04,385 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-23 15:19:04,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:19:04,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-07-23 15:19:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:04,387 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:19:04,387 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:19:04,388 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:19:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:19:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:19:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:19:04,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-07-23 15:19:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:04,393 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:19:04,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:19:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:19:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:19:04,394 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:04,394 INFO L353 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-07-23 15:19:04,394 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-07-23 15:19:04,394 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:04,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:04,633 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:19:04,634 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:19:04,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:19:04,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:19:04,635 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-07-23 15:19:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:04,657 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:19:04,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:19:04,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-07-23 15:19:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:04,658 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:19:04,658 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:19:04,659 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:19:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:19:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:19:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:19:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:19:04,663 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-07-23 15:19:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:04,663 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:19:04,663 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:19:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:19:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:19:04,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:04,664 INFO L353 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-07-23 15:19:04,664 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-07-23 15:19:04,664 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:04,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:04,807 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:19:04,807 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:19:04,807 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:19:04,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:19:04,808 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-07-23 15:19:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:04,829 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-23 15:19:04,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:19:04,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-07-23 15:19:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:04,830 INFO L225 Difference]: With dead ends: 38 [2018-07-23 15:19:04,830 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:19:04,831 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:19:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:19:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:19:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:19:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:19:04,836 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-07-23 15:19:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:04,837 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:19:04,837 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:19:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:19:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:19:04,837 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:04,837 INFO L353 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-07-23 15:19:04,838 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:04,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-07-23 15:19:04,838 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:04,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:04,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:19:04,988 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:19:04,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:19:04,989 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:04,989 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-07-23 15:19:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:05,013 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:19:05,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:19:05,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-07-23 15:19:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:05,014 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:19:05,014 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:19:05,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:19:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:19:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:19:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:19:05,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-07-23 15:19:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:05,018 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:19:05,018 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:19:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:19:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:19:05,019 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:05,019 INFO L353 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-07-23 15:19:05,019 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-07-23 15:19:05,020 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:05,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:05,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:19:05,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:19:05,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:19:05,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:19:05,179 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-07-23 15:19:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:05,204 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 15:19:05,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:19:05,204 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-07-23 15:19:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:05,204 INFO L225 Difference]: With dead ends: 40 [2018-07-23 15:19:05,204 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 15:19:05,205 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:19:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 15:19:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-23 15:19:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:19:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:19:05,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-07-23 15:19:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:05,209 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:19:05,209 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:19:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:19:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:19:05,209 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:05,209 INFO L353 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-07-23 15:19:05,210 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-07-23 15:19:05,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:05,370 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:05,370 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:19:05,370 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:19:05,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:19:05,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:19:05,372 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-07-23 15:19:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:05,400 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:19:05,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:19:05,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-07-23 15:19:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:05,401 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:19:05,401 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:19:05,402 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:19:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:19:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:19:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:19:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:19:05,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-07-23 15:19:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:05,412 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:19:05,412 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:19:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:19:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:19:05,413 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:05,413 INFO L353 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-07-23 15:19:05,418 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:05,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-07-23 15:19:05,419 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:05,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:05,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:19:05,596 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:19:05,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:19:05,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:05,597 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-07-23 15:19:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:05,623 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-23 15:19:05,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:19:05,623 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-07-23 15:19:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:05,624 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:19:05,624 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:19:05,625 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:19:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:19:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:19:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:19:05,628 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-07-23 15:19:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:05,628 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:19:05,628 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:19:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:19:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:19:05,629 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:05,629 INFO L353 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-07-23 15:19:05,629 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-07-23 15:19:05,630 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:05,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:05,794 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:19:05,795 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:19:05,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:19:05,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:19:05,796 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-07-23 15:19:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:05,819 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:19:05,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:19:05,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-07-23 15:19:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:05,820 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:19:05,820 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:19:05,821 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:19:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:19:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:19:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:19:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:19:05,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-07-23 15:19:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:05,824 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:19:05,824 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:19:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:19:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:19:05,824 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:05,826 INFO L353 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-07-23 15:19:05,826 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-07-23 15:19:05,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:05,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:05,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:19:05,994 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:19:05,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:19:05,995 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:19:05,996 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-07-23 15:19:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:06,023 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-23 15:19:06,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:19:06,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-07-23 15:19:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:06,024 INFO L225 Difference]: With dead ends: 44 [2018-07-23 15:19:06,024 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 15:19:06,025 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:19:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 15:19:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 15:19:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:19:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:19:06,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-07-23 15:19:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:06,029 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:19:06,029 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:19:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:19:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:19:06,030 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:06,030 INFO L353 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-07-23 15:19:06,030 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-07-23 15:19:06,030 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:06,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:06,205 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:19:06,205 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:19:06,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:19:06,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:19:06,207 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-07-23 15:19:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:06,236 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:19:06,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:19:06,237 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-07-23 15:19:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:06,237 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:19:06,237 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:19:06,238 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:19:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:19:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:19:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:19:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:19:06,241 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-07-23 15:19:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:06,242 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:19:06,242 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:19:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:19:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:19:06,242 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:06,242 INFO L353 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-07-23 15:19:06,242 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-07-23 15:19:06,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:06,418 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:06,418 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:19:06,418 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:19:06,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:19:06,419 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:19:06,420 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-07-23 15:19:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:06,443 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 15:19:06,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:19:06,443 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-07-23 15:19:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:06,444 INFO L225 Difference]: With dead ends: 46 [2018-07-23 15:19:06,444 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 15:19:06,445 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:19:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 15:19:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 15:19:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:19:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:19:06,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-07-23 15:19:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:06,448 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:19:06,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:19:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:19:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:19:06,448 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:06,448 INFO L353 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-07-23 15:19:06,449 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-07-23 15:19:06,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:06,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:06,633 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:19:06,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:19:06,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:19:06,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:19:06,635 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-07-23 15:19:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:06,665 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:19:06,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:19:06,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-07-23 15:19:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:06,666 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:19:06,666 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:19:06,667 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:19:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:19:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:19:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:19:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:19:06,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-07-23 15:19:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:06,669 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:19:06,669 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:19:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:19:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:19:06,670 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:06,670 INFO L353 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-07-23 15:19:06,670 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-07-23 15:19:06,671 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:06,875 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:06,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:19:06,876 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:19:06,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:19:06,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:19:06,878 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-07-23 15:19:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:06,904 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-23 15:19:06,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:19:06,904 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-07-23 15:19:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:06,905 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:19:06,905 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:19:06,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:19:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:19:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:19:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:19:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:19:06,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-07-23 15:19:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:06,911 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:19:06,911 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:19:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:19:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:19:06,911 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:06,912 INFO L353 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-07-23 15:19:06,912 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-07-23 15:19:06,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:07,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:07,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:19:07,124 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:19:07,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:19:07,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:19:07,126 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-07-23 15:19:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:07,162 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:19:07,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:19:07,162 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-07-23 15:19:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:07,163 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:19:07,163 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:19:07,164 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:19:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:19:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:19:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:19:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:19:07,170 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-07-23 15:19:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:07,170 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:19:07,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:19:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:19:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:19:07,174 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:07,175 INFO L353 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-07-23 15:19:07,175 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-07-23 15:19:07,175 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:07,425 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:07,426 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:19:07,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:19:07,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:19:07,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:19:07,428 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-07-23 15:19:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:07,470 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-23 15:19:07,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:19:07,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-07-23 15:19:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:07,471 INFO L225 Difference]: With dead ends: 50 [2018-07-23 15:19:07,471 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 15:19:07,473 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:19:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 15:19:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 15:19:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:19:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:19:07,477 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-07-23 15:19:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:07,477 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:19:07,477 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:19:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:19:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:19:07,478 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:07,478 INFO L353 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-07-23 15:19:07,478 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-07-23 15:19:07,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:07,685 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:07,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:19:07,686 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:19:07,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:19:07,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:19:07,688 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-07-23 15:19:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:07,720 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:19:07,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:19:07,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-07-23 15:19:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:07,721 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:19:07,721 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:19:07,722 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:19:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:19:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:19:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:19:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:19:07,726 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-07-23 15:19:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:07,726 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:19:07,726 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:19:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:19:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:19:07,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:07,727 INFO L353 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-07-23 15:19:07,727 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:07,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-07-23 15:19:07,728 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:07,916 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:07,916 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:19:07,917 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:19:07,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:19:07,918 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:19:07,918 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-07-23 15:19:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:07,945 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 15:19:07,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:19:07,946 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-07-23 15:19:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:07,946 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:19:07,947 INFO L226 Difference]: Without dead ends: 50 [2018-07-23 15:19:07,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:19:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-23 15:19:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-23 15:19:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:19:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:19:07,950 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-07-23 15:19:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:07,950 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:19:07,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:19:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:19:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:19:07,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:07,952 INFO L353 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-07-23 15:19:07,952 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-07-23 15:19:07,953 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:08,148 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:08,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:19:08,149 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:19:08,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:19:08,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:19:08,150 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-07-23 15:19:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:08,177 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:19:08,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:19:08,178 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-07-23 15:19:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:08,178 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:19:08,178 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:19:08,179 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:19:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:19:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:19:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:19:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:19:08,183 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-07-23 15:19:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:08,183 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:19:08,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:19:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:19:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:19:08,183 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:08,184 INFO L353 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-07-23 15:19:08,184 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-07-23 15:19:08,184 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:08,379 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:08,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:19:08,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:19:08,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:19:08,381 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:19:08,381 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-07-23 15:19:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:08,411 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-23 15:19:08,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:19:08,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-07-23 15:19:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:08,412 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:19:08,412 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:19:08,413 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:19:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:19:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:19:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:19:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:19:08,416 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-07-23 15:19:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:08,416 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:19:08,416 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:19:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:19:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:19:08,417 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:08,417 INFO L353 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-07-23 15:19:08,417 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-07-23 15:19:08,417 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:08,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:08,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:19:08,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:19:08,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:19:08,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:19:08,621 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-07-23 15:19:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:08,655 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:19:08,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:19:08,656 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-07-23 15:19:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:08,656 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:19:08,656 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:19:08,657 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:19:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:19:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:19:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:19:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:19:08,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-07-23 15:19:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:08,661 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:19:08,661 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:19:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:19:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:19:08,661 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:08,661 INFO L353 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-07-23 15:19:08,662 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-07-23 15:19:08,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:08,869 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:08,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:19:08,870 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:19:08,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:19:08,871 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:19:08,871 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-07-23 15:19:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:08,907 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-23 15:19:08,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:19:08,907 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-07-23 15:19:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:08,908 INFO L225 Difference]: With dead ends: 56 [2018-07-23 15:19:08,908 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 15:19:08,908 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:19:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 15:19:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 15:19:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:19:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:19:08,911 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-07-23 15:19:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:08,911 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:19:08,911 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:19:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:19:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:19:08,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:08,912 INFO L353 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-07-23 15:19:08,912 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-07-23 15:19:08,913 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:09,127 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:09,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:19:09,128 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:19:09,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:19:09,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:19:09,129 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-07-23 15:19:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:09,170 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:19:09,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:19:09,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-07-23 15:19:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:09,171 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:19:09,171 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:19:09,172 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:19:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:19:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:19:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:19:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:19:09,174 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-07-23 15:19:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:09,175 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:19:09,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:19:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:19:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:19:09,175 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:09,175 INFO L353 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-07-23 15:19:09,176 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:09,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-07-23 15:19:09,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:09,386 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:09,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:19:09,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:19:09,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:19:09,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:19:09,389 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-07-23 15:19:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:09,421 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 15:19:09,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:19:09,422 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-07-23 15:19:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:09,422 INFO L225 Difference]: With dead ends: 58 [2018-07-23 15:19:09,422 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 15:19:09,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:19:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 15:19:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 15:19:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:19:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:19:09,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-07-23 15:19:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:09,426 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:19:09,427 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:19:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:19:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:19:09,427 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:09,427 INFO L353 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-07-23 15:19:09,427 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-07-23 15:19:09,428 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:09,657 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:09,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:19:09,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:19:09,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:19:09,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:19:09,659 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-07-23 15:19:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:09,697 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:19:09,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:19:09,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-07-23 15:19:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:09,699 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:19:09,699 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:19:09,700 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:19:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:19:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:19:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:19:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:19:09,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-07-23 15:19:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:09,703 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:19:09,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:19:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:19:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:19:09,704 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:09,704 INFO L353 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-07-23 15:19:09,704 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-07-23 15:19:09,705 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:09,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:09,971 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:19:09,971 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:19:09,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:19:09,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:19:09,973 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-07-23 15:19:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:10,024 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-23 15:19:10,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:19:10,025 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-07-23 15:19:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:10,026 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:19:10,026 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:19:10,027 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:19:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:19:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:19:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:19:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:19:10,030 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-07-23 15:19:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:10,031 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:19:10,031 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:19:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:19:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:19:10,032 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:10,032 INFO L353 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-07-23 15:19:10,032 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-07-23 15:19:10,033 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:10,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:10,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:19:10,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:19:10,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:19:10,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:19:10,348 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-07-23 15:19:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:10,391 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:19:10,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:19:10,392 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-07-23 15:19:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:10,392 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:19:10,393 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:19:10,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:19:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:19:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:19:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:19:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:19:10,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-07-23 15:19:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:10,397 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:19:10,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:19:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:19:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:19:10,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:10,398 INFO L353 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-07-23 15:19:10,398 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-07-23 15:19:10,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:10,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:10,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:19:10,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:19:10,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:19:10,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:19:10,622 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-07-23 15:19:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:10,658 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-23 15:19:10,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:19:10,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-07-23 15:19:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:10,660 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:19:10,660 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 15:19:10,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:19:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 15:19:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 15:19:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:19:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:19:10,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-07-23 15:19:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:10,665 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:19:10,665 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:19:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:19:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:19:10,666 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:10,666 INFO L353 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-07-23 15:19:10,666 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-07-23 15:19:10,667 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:10,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:10,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:19:10,895 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:19:10,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:19:10,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:19:10,897 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-07-23 15:19:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:10,944 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:19:10,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:19:10,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-07-23 15:19:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:10,945 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:19:10,945 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:19:10,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:19:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:19:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:19:10,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:19:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:19:10,949 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-07-23 15:19:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:10,950 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:19:10,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:19:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:19:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:19:10,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:10,951 INFO L353 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-07-23 15:19:10,951 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-07-23 15:19:10,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,198 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,198 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:19:11,198 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:19:11,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:19:11,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:19:11,200 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-07-23 15:19:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,252 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 15:19:11,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:19:11,253 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-07-23 15:19:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,253 INFO L225 Difference]: With dead ends: 64 [2018-07-23 15:19:11,253 INFO L226 Difference]: Without dead ends: 62 [2018-07-23 15:19:11,254 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:19:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-23 15:19:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-23 15:19:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:19:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:19:11,258 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-07-23 15:19:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,258 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:19:11,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:19:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:19:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:19:11,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,259 INFO L353 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-07-23 15:19:11,259 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-07-23 15:19:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,537 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,537 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:19:11,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:19:11,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:19:11,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:19:11,539 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-07-23 15:19:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,583 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:19:11,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:19:11,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-07-23 15:19:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,584 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:19:11,584 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:19:11,585 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:19:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:19:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:19:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:19:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:19:11,588 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-07-23 15:19:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,589 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:19:11,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:19:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:19:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:19:11,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,590 INFO L353 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-07-23 15:19:11,590 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-07-23 15:19:11,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:11,859 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:11,859 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:19:11,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:19:11,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:19:11,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:19:11,861 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-07-23 15:19:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:11,908 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-23 15:19:11,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:19:11,908 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-07-23 15:19:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:11,909 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:19:11,909 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:19:11,910 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:19:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:19:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:19:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:19:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:19:11,913 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-07-23 15:19:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:11,913 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:19:11,914 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:19:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:19:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:19:11,914 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:11,914 INFO L353 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-07-23 15:19:11,915 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-07-23 15:19:11,915 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,171 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:19:12,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:19:12,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:19:12,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:19:12,173 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-07-23 15:19:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,221 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:19:12,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:19:12,221 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-07-23 15:19:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,222 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:19:12,222 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:19:12,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:19:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:19:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:19:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:19:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:19:12,226 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-07-23 15:19:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,226 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:19:12,226 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:19:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:19:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:19:12,227 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,227 INFO L353 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-07-23 15:19:12,227 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-07-23 15:19:12,228 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:19:12,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:19:12,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:19:12,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:19:12,492 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-07-23 15:19:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,550 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-23 15:19:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:19:12,550 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-07-23 15:19:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,551 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:19:12,551 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:19:12,552 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:19:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:19:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 15:19:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:19:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:19:12,555 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-07-23 15:19:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,555 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:19:12,555 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:19:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:19:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:19:12,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,556 INFO L353 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-07-23 15:19:12,557 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-07-23 15:19:12,557 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:12,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:12,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:19:12,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:19:12,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:19:12,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:19:12,849 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-07-23 15:19:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:12,914 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:19:12,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:19:12,914 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-07-23 15:19:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:12,915 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:19:12,915 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:19:12,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:19:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:19:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:19:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:19:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:19:12,920 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-07-23 15:19:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:12,921 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:19:12,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:19:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:19:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:19:12,922 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:12,922 INFO L353 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-07-23 15:19:12,922 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-07-23 15:19:12,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,255 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:19:13,255 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:19:13,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:19:13,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:19:13,258 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-07-23 15:19:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,312 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 15:19:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:19:13,313 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-07-23 15:19:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,314 INFO L225 Difference]: With dead ends: 70 [2018-07-23 15:19:13,314 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 15:19:13,316 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:19:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 15:19:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 15:19:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:19:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:19:13,322 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-07-23 15:19:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,322 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:19:13,323 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:19:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:19:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:19:13,323 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,324 INFO L353 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-07-23 15:19:13,324 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-07-23 15:19:13,325 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:13,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:13,669 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:19:13,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:19:13,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:19:13,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:19:13,671 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-07-23 15:19:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:13,729 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:19:13,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:19:13,730 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-07-23 15:19:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:13,730 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:19:13,731 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:19:13,732 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:19:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:19:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:19:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:19:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:19:13,735 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-07-23 15:19:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:13,736 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:19:13,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:19:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:19:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:19:13,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:13,737 INFO L353 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-07-23 15:19:13,737 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-07-23 15:19:13,738 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:19:14,033 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:19:14,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:19:14,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:19:14,035 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-07-23 15:19:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,098 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-23 15:19:14,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:19:14,099 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-07-23 15:19:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,099 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:19:14,099 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:19:14,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:19:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:19:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:19:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:19:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:19:14,104 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-07-23 15:19:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,104 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:19:14,104 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:19:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:19:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:19:14,105 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,105 INFO L353 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-07-23 15:19:14,105 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-07-23 15:19:14,106 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:19:14,383 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:19:14,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:19:14,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:19:14,385 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-07-23 15:19:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,436 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:19:14,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:19:14,436 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-07-23 15:19:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,437 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:19:14,437 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:19:14,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:19:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:19:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:19:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:19:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:19:14,441 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-07-23 15:19:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,442 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:19:14,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:19:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:19:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:19:14,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,443 INFO L353 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-07-23 15:19:14,443 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-07-23 15:19:14,443 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:14,741 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:14,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:19:14,742 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:19:14,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:19:14,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:19:14,744 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-07-23 15:19:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:14,792 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-23 15:19:14,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:19:14,792 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-07-23 15:19:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:14,793 INFO L225 Difference]: With dead ends: 74 [2018-07-23 15:19:14,793 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 15:19:14,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:19:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 15:19:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 15:19:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:19:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:19:14,798 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-07-23 15:19:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:14,798 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:19:14,798 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:19:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:19:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:19:14,799 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:14,799 INFO L353 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-07-23 15:19:14,799 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:14,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-07-23 15:19:14,800 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,103 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,103 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:19:15,104 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:19:15,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:19:15,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:19:15,106 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-07-23 15:19:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,180 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:19:15,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:19:15,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-07-23 15:19:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,181 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:19:15,181 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:19:15,182 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:19:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:19:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:19:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:19:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:19:15,190 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-07-23 15:19:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,190 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:19:15,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:19:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:19:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:19:15,191 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,191 INFO L353 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-07-23 15:19:15,191 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-07-23 15:19:15,192 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,508 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,508 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:19:15,508 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:19:15,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:19:15,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:19:15,511 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-07-23 15:19:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:15,619 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 15:19:15,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:19:15,620 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-07-23 15:19:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:15,620 INFO L225 Difference]: With dead ends: 76 [2018-07-23 15:19:15,621 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:19:15,622 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:19:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:19:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:19:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:19:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:19:15,625 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-07-23 15:19:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:15,626 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:19:15,626 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:19:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:19:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:19:15,627 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:15,627 INFO L353 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-07-23 15:19:15,627 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-07-23 15:19:15,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:15,976 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:15,976 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:19:15,977 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:19:15,978 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:19:15,978 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:19:15,979 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-07-23 15:19:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,060 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:19:16,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:19:16,060 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-07-23 15:19:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,061 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:19:16,061 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:19:16,062 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:19:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:19:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:19:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:19:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:19:16,065 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-07-23 15:19:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,066 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:19:16,066 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:19:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:19:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:19:16,067 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,067 INFO L353 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-07-23 15:19:16,067 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-07-23 15:19:16,067 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,439 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,439 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:19:16,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:19:16,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:19:16,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:19:16,445 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-07-23 15:19:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,521 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-23 15:19:16,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:19:16,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-07-23 15:19:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,522 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:19:16,522 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:19:16,523 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:19:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:19:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:19:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:19:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:19:16,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-07-23 15:19:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,526 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:19:16,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:19:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:19:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:19:16,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,527 INFO L353 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-07-23 15:19:16,528 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-07-23 15:19:16,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:16,836 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:16,836 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:19:16,836 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:19:16,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:19:16,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:19:16,838 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-07-23 15:19:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:16,925 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:19:16,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:19:16,925 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-07-23 15:19:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:16,926 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:19:16,926 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:19:16,927 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:19:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:19:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:19:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:19:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:19:16,931 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-07-23 15:19:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:16,931 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:19:16,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:19:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:19:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:19:16,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:16,932 INFO L353 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-07-23 15:19:16,932 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-07-23 15:19:16,933 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,253 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,254 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:19:17,254 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:19:17,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:19:17,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:19:17,256 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-07-23 15:19:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:17,335 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-23 15:19:17,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:19:17,336 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-07-23 15:19:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:17,336 INFO L225 Difference]: With dead ends: 80 [2018-07-23 15:19:17,336 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 15:19:17,338 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:19:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 15:19:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 15:19:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:19:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:19:17,341 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-07-23 15:19:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:17,341 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:19:17,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:19:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:19:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:19:17,342 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:17,343 INFO L353 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-07-23 15:19:17,343 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:17,343 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-07-23 15:19:17,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:17,650 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:17,650 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:19:17,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:19:17,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:19:17,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:19:17,653 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-07-23 15:19:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:17,729 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:19:17,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:19:17,729 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-07-23 15:19:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:17,730 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:19:17,730 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:19:17,731 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:19:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:19:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:19:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:19:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:19:17,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-07-23 15:19:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:17,735 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:19:17,735 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:19:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:19:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:19:17,736 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:17,736 INFO L353 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-07-23 15:19:17,736 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:17,737 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-07-23 15:19:17,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,059 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,060 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:19:18,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:19:18,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:19:18,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:19:18,062 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-07-23 15:19:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:18,151 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 15:19:18,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:19:18,151 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-07-23 15:19:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:18,152 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:19:18,152 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 15:19:18,154 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:19:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 15:19:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 15:19:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:19:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:19:18,157 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-07-23 15:19:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:18,158 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:19:18,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:19:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:19:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:19:18,159 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:18,159 INFO L353 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-07-23 15:19:18,159 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-07-23 15:19:18,159 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,499 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:19:18,500 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:19:18,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:19:18,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:19:18,502 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-07-23 15:19:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:18,579 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:19:18,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:19:18,579 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-07-23 15:19:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:18,580 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:19:18,580 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:19:18,582 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:19:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:19:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:19:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:19:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:19:18,587 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-07-23 15:19:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:18,587 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:19:18,587 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:19:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:19:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:19:18,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:18,589 INFO L353 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-07-23 15:19:18,589 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-07-23 15:19:18,589 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:18,955 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:18,956 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:19:18,956 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:19:18,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:19:18,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:19:18,958 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-07-23 15:19:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,010 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-23 15:19:19,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:19:19,010 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-07-23 15:19:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,011 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:19:19,011 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:19:19,012 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:19:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:19:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:19:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:19:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:19:19,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-07-23 15:19:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,016 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:19:19,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:19:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:19:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:19:19,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,017 INFO L353 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-07-23 15:19:19,017 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-07-23 15:19:19,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:19,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:19,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:19:19,454 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:19:19,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:19:19,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:19:19,457 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-07-23 15:19:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:19,537 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:19:19,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:19:19,538 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-07-23 15:19:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:19,539 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:19:19,539 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:19:19,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:19:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:19:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:19:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:19:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:19:19,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-07-23 15:19:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:19,545 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:19:19,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:19:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:19:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:19:19,546 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:19,546 INFO L353 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-07-23 15:19:19,546 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-07-23 15:19:19,547 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:19,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:19,952 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:19:19,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:19:19,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:19:19,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:19:19,955 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-07-23 15:19:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:20,044 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-23 15:19:20,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:19:20,045 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-07-23 15:19:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:20,045 INFO L225 Difference]: With dead ends: 86 [2018-07-23 15:19:20,045 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 15:19:20,047 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:19:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 15:19:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 15:19:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:19:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:19:20,050 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-07-23 15:19:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:20,050 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:19:20,050 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:19:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:19:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:19:20,051 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:20,051 INFO L353 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-07-23 15:19:20,052 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-07-23 15:19:20,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:20,356 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:20,356 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:19:20,356 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:19:20,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:19:20,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:19:20,358 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-07-23 15:19:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:20,434 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:19:20,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:19:20,435 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-07-23 15:19:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:20,436 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:19:20,436 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:19:20,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:19:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:19:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:19:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:19:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:19:20,440 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-07-23 15:19:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:20,441 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:19:20,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:19:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:19:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:19:20,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:20,442 INFO L353 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-07-23 15:19:20,442 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-07-23 15:19:20,442 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:20,746 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:20,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:19:20,747 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:19:20,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:19:20,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:19:20,749 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-07-23 15:19:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:20,812 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 15:19:20,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:19:20,812 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-07-23 15:19:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:20,813 INFO L225 Difference]: With dead ends: 88 [2018-07-23 15:19:20,813 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 15:19:20,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:19:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 15:19:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-23 15:19:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:19:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:19:20,818 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-07-23 15:19:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:20,818 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:19:20,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:19:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:19:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:19:20,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:20,819 INFO L353 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-07-23 15:19:20,819 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-07-23 15:19:20,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,128 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,129 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:19:21,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:19:21,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:19:21,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:19:21,132 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-07-23 15:19:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,248 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:19:21,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:19:21,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-07-23 15:19:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,249 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:19:21,249 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:19:21,254 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:19:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:19:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:19:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:19:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:19:21,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-07-23 15:19:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,258 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:19:21,259 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:19:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:19:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:19:21,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,260 INFO L353 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-07-23 15:19:21,260 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-07-23 15:19:21,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:19:21,586 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:19:21,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:19:21,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:19:21,589 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-07-23 15:19:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,650 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-23 15:19:21,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:19:21,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-07-23 15:19:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,651 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:19:21,651 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:19:21,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:19:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:19:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:19:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:19:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:19:21,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-07-23 15:19:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,657 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:19:21,657 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:19:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:19:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:19:21,658 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,658 INFO L353 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-07-23 15:19:21,658 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,658 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-07-23 15:19:21,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:19:21,994 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:19:21,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:19:21,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:19:21,997 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-07-23 15:19:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:22,111 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:19:22,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:19:22,111 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-07-23 15:19:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:22,112 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:19:22,112 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:19:22,114 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:19:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:19:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:19:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:19:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:19:22,119 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-07-23 15:19:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:22,119 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:19:22,119 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:19:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:19:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:19:22,120 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:22,120 INFO L353 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-07-23 15:19:22,121 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-07-23 15:19:22,121 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:22,489 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:22,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:19:22,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:19:22,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:19:22,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:19:22,492 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-07-23 15:19:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:22,557 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-23 15:19:22,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:19:22,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-07-23 15:19:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:22,559 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:19:22,559 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 15:19:22,560 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:19:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 15:19:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 15:19:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:19:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:19:22,565 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-07-23 15:19:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:22,565 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:19:22,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:19:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:19:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:19:22,567 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:22,567 INFO L353 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-07-23 15:19:22,567 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-07-23 15:19:22,568 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:22,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:22,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:19:22,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:19:22,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:19:22,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:19:22,939 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-07-23 15:19:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,044 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:19:23,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:19:23,045 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-07-23 15:19:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,045 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:19:23,045 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:19:23,047 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:19:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:19:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:19:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:19:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:19:23,050 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-07-23 15:19:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,051 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:19:23,051 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:19:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:19:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:19:23,052 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,052 INFO L353 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-07-23 15:19:23,052 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-07-23 15:19:23,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:23,377 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:23,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:19:23,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:19:23,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:19:23,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:19:23,380 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-07-23 15:19:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,446 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 15:19:23,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:19:23,446 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-07-23 15:19:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,447 INFO L225 Difference]: With dead ends: 94 [2018-07-23 15:19:23,447 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:19:23,448 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:19:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:19:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:19:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:19:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:19:23,452 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-07-23 15:19:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,453 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:19:23,453 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:19:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:19:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:19:23,454 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,454 INFO L353 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-07-23 15:19:23,454 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-07-23 15:19:23,454 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:23,829 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:23,829 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:19:23,829 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:19:23,830 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:19:23,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:19:23,832 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-07-23 15:19:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:23,969 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:19:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:19:23,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-07-23 15:19:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:23,970 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:19:23,970 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:19:23,971 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:19:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:19:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:19:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:19:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:19:23,975 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-07-23 15:19:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:23,976 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:19:23,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:19:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:19:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:19:23,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:23,977 INFO L353 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-07-23 15:19:23,977 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-07-23 15:19:23,978 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:24,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:24,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:19:24,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:19:24,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:19:24,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:19:24,353 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-07-23 15:19:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:24,451 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-23 15:19:24,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:19:24,454 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-07-23 15:19:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:24,455 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:19:24,455 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:19:24,457 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:19:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:19:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:19:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:19:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:19:24,460 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-07-23 15:19:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:24,461 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:19:24,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:19:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:19:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:19:24,462 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:24,462 INFO L353 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-07-23 15:19:24,462 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-07-23 15:19:24,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:24,781 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:24,781 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:19:24,782 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:19:24,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:19:24,783 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:19:24,784 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-07-23 15:19:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:24,847 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:19:24,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:19:24,847 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-07-23 15:19:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:24,848 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:19:24,848 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:19:24,850 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:19:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:19:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:19:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:19:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:19:24,853 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-07-23 15:19:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:24,854 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:19:24,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:19:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:19:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:19:24,855 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:24,855 INFO L353 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-07-23 15:19:24,855 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-07-23 15:19:24,855 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:25,171 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:25,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:19:25,172 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:19:25,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:19:25,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:19:25,174 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-07-23 15:19:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:25,295 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-23 15:19:25,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:19:25,295 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-07-23 15:19:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:25,296 INFO L225 Difference]: With dead ends: 98 [2018-07-23 15:19:25,296 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 15:19:25,298 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:19:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 15:19:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 15:19:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:19:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:19:25,302 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-07-23 15:19:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:25,302 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:19:25,302 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:19:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:19:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:19:25,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:25,303 INFO L353 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-07-23 15:19:25,303 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-07-23 15:19:25,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:25,814 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:25,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:19:25,815 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:19:25,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:19:25,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:19:25,817 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-07-23 15:19:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:25,974 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:19:25,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:19:25,974 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-07-23 15:19:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:25,975 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:19:25,975 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:19:25,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:19:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:19:25,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:19:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:19:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:19:25,981 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-07-23 15:19:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:25,981 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:19:25,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:19:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:19:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:19:25,982 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:25,982 INFO L353 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-07-23 15:19:25,982 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:25,983 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-07-23 15:19:25,983 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:26,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:26,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:19:26,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:19:26,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:19:26,421 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:19:26,421 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-07-23 15:19:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:26,514 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 15:19:26,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:19:26,514 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-07-23 15:19:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:26,515 INFO L225 Difference]: With dead ends: 100 [2018-07-23 15:19:26,515 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 15:19:26,516 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:19:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 15:19:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-23 15:19:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:19:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:19:26,520 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-07-23 15:19:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:26,520 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:19:26,520 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:19:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:19:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:19:26,521 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:26,521 INFO L353 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-07-23 15:19:26,522 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-07-23 15:19:26,522 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:26,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:26,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:19:26,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:19:26,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:19:26,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:19:26,900 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-07-23 15:19:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:26,975 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:19:26,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:19:26,975 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-07-23 15:19:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:26,976 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:19:26,976 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:19:26,978 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:19:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:19:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:19:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:19:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:19:26,982 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-07-23 15:19:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:26,982 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:19:26,982 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:19:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:19:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:19:26,983 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:26,983 INFO L353 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-07-23 15:19:26,983 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-07-23 15:19:26,984 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:27,362 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:27,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:19:27,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:19:27,364 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:19:27,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:19:27,365 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-07-23 15:19:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:27,428 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-23 15:19:27,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:19:27,428 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-07-23 15:19:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:27,429 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:19:27,429 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:19:27,431 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:19:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:19:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:19:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:19:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:19:27,434 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-07-23 15:19:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:27,434 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:19:27,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:19:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:19:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:19:27,435 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:27,436 INFO L353 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-07-23 15:19:27,436 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-07-23 15:19:27,436 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:27,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:27,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:19:27,785 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:19:27,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:19:27,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:19:27,787 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-07-23 15:19:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:27,868 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:19:27,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:19:27,868 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-07-23 15:19:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:27,869 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:19:27,869 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:19:27,870 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:19:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:19:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:19:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:19:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:19:27,873 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-07-23 15:19:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:27,874 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:19:27,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:19:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:19:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:19:27,875 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:27,875 INFO L353 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-07-23 15:19:27,875 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-07-23 15:19:27,875 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:28,201 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:28,201 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:19:28,201 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:19:28,202 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:19:28,203 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:19:28,203 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-07-23 15:19:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:28,291 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-23 15:19:28,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:19:28,291 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-07-23 15:19:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:28,292 INFO L225 Difference]: With dead ends: 104 [2018-07-23 15:19:28,292 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 15:19:28,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:19:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 15:19:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 15:19:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:19:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:19:28,296 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-07-23 15:19:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:28,297 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:19:28,297 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:19:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:19:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:19:28,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:28,298 INFO L353 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-07-23 15:19:28,298 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-07-23 15:19:28,298 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:28,630 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:28,630 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:19:28,631 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:19:28,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:19:28,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:19:28,633 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-07-23 15:19:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:28,714 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:19:28,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:19:28,714 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-07-23 15:19:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:28,715 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:19:28,715 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:19:28,717 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:19:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:19:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:19:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:19:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:19:28,720 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-07-23 15:19:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:28,720 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:19:28,720 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:19:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:19:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:19:28,721 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:28,721 INFO L353 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-07-23 15:19:28,721 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-07-23 15:19:28,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:29,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:29,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:19:29,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:19:29,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:19:29,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:19:29,163 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-07-23 15:19:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:29,255 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 15:19:29,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:19:29,255 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-07-23 15:19:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:29,256 INFO L225 Difference]: With dead ends: 106 [2018-07-23 15:19:29,256 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 15:19:29,257 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:19:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 15:19:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 15:19:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:19:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:19:29,260 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-07-23 15:19:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:29,261 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:19:29,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:19:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:19:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:19:29,261 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:29,262 INFO L353 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-07-23 15:19:29,262 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-07-23 15:19:29,262 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:29,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:29,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:19:29,638 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:19:29,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:19:29,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:19:29,639 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-07-23 15:19:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:29,713 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:19:29,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:19:29,713 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-07-23 15:19:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:29,714 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:19:29,714 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:19:29,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:19:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:19:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:19:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:19:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:19:29,718 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-07-23 15:19:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:29,719 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:19:29,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:19:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:19:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:19:29,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:29,720 INFO L353 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-07-23 15:19:29,720 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-07-23 15:19:29,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:30,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:30,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:19:30,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:19:30,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:19:30,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:19:30,064 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-07-23 15:19:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:30,142 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-23 15:19:30,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:19:30,142 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-07-23 15:19:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:30,143 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:19:30,143 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:19:30,145 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:19:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:19:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:19:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:19:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:19:30,148 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-07-23 15:19:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:30,148 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:19:30,148 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:19:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:19:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:19:30,149 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:30,149 INFO L353 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-07-23 15:19:30,149 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-07-23 15:19:30,149 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:30,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:30,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:19:30,503 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:19:30,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:19:30,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:19:30,506 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-07-23 15:19:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:30,603 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:19:30,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:19:30,604 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-07-23 15:19:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:30,605 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:19:30,605 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:19:30,606 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:19:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:19:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:19:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:19:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:19:30,610 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-07-23 15:19:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:30,610 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:19:30,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:19:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:19:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:19:30,611 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:30,611 INFO L353 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-07-23 15:19:30,611 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-07-23 15:19:30,611 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:30,948 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:30,948 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:19:30,948 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:19:30,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:19:30,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:19:30,950 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-07-23 15:19:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:31,078 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-23 15:19:31,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:19:31,078 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-07-23 15:19:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:31,079 INFO L225 Difference]: With dead ends: 110 [2018-07-23 15:19:31,079 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 15:19:31,080 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:19:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 15:19:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 15:19:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:19:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:19:31,083 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-07-23 15:19:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:31,083 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:19:31,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:19:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:19:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:19:31,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:31,084 INFO L353 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-07-23 15:19:31,084 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-07-23 15:19:31,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:31,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:31,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:19:31,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:19:31,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:19:31,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:19:31,424 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-07-23 15:19:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:31,520 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:19:31,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:19:31,520 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-07-23 15:19:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:31,521 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:19:31,521 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:19:31,522 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:19:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:19:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:19:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:19:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:19:31,526 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-07-23 15:19:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:31,526 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:19:31,526 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:19:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:19:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:19:31,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:31,527 INFO L353 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-07-23 15:19:31,527 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-07-23 15:19:31,527 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:32,071 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:32,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:19:32,071 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:19:32,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:19:32,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:19:32,074 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-07-23 15:19:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:32,139 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 15:19:32,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:19:32,140 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-07-23 15:19:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:32,140 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:19:32,140 INFO L226 Difference]: Without dead ends: 110 [2018-07-23 15:19:32,142 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:19:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-23 15:19:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-23 15:19:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:19:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:19:32,146 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-07-23 15:19:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:32,146 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:19:32,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:19:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:19:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:19:32,147 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:32,148 INFO L353 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-07-23 15:19:32,148 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-07-23 15:19:32,148 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:32,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:32,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:19:32,573 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:19:32,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:19:32,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:19:32,575 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-07-23 15:19:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:32,675 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:19:32,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:19:32,675 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-07-23 15:19:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:32,677 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:19:32,677 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:19:32,678 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:19:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:19:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:19:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:19:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:19:32,681 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-07-23 15:19:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:32,682 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:19:32,682 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:19:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:19:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:19:32,682 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:32,683 INFO L353 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-07-23 15:19:32,683 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-07-23 15:19:32,683 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:33,007 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:33,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:19:33,008 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:19:33,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:19:33,010 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:19:33,010 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-07-23 15:19:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:33,146 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-23 15:19:33,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:19:33,146 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-07-23 15:19:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:33,147 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:19:33,147 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:19:33,149 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:19:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:19:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:19:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:19:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:19:33,156 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-07-23 15:19:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:33,156 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:19:33,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:19:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:19:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:19:33,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:33,157 INFO L353 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-07-23 15:19:33,157 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-07-23 15:19:33,158 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:33,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:33,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:19:33,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:19:33,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:19:33,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:19:33,569 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-07-23 15:19:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:33,663 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:19:33,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:19:33,663 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-07-23 15:19:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:33,664 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:19:33,664 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:19:33,666 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:19:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:19:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:19:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:19:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:19:33,669 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-07-23 15:19:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:33,670 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:19:33,670 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:19:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:19:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:19:33,671 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:33,671 INFO L353 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-07-23 15:19:33,671 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-07-23 15:19:33,671 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:34,029 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:34,029 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:19:34,030 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:19:34,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:19:34,032 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:19:34,032 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-07-23 15:19:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:34,190 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-23 15:19:34,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:19:34,190 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-07-23 15:19:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:34,191 INFO L225 Difference]: With dead ends: 116 [2018-07-23 15:19:34,191 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 15:19:34,193 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:19:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 15:19:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 15:19:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:19:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:19:34,198 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-07-23 15:19:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:34,198 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:19:34,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:19:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:19:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:19:34,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:34,202 INFO L353 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-07-23 15:19:34,202 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-07-23 15:19:34,202 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:34,627 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:34,628 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:19:34,628 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:19:34,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:19:34,630 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:19:34,630 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-07-23 15:19:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:34,696 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:19:34,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:19:34,697 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-07-23 15:19:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:34,697 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:19:34,697 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:19:34,699 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:19:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:19:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:19:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:19:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:19:34,702 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-07-23 15:19:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:34,703 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:19:34,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:19:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:19:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:19:34,704 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:34,704 INFO L353 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-07-23 15:19:34,704 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-07-23 15:19:34,704 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:35,071 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:35,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:19:35,071 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:19:35,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:19:35,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:19:35,073 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-07-23 15:19:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:35,232 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 15:19:35,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:19:35,232 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-07-23 15:19:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:35,271 INFO L225 Difference]: With dead ends: 118 [2018-07-23 15:19:35,271 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 15:19:35,272 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:19:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 15:19:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 15:19:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:19:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:19:35,285 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-07-23 15:19:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:35,285 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:19:35,285 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:19:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:19:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:19:35,286 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:35,286 INFO L353 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-07-23 15:19:35,286 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-07-23 15:19:35,286 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:35,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:35,627 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:19:35,627 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:19:35,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:19:35,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:19:35,629 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-07-23 15:19:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:35,737 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:19:35,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:19:35,737 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-07-23 15:19:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:35,738 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:19:35,738 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:19:35,740 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:19:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:19:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:19:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:19:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:19:35,742 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-07-23 15:19:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:35,742 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:19:35,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:19:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:19:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:19:35,743 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:35,743 INFO L353 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-07-23 15:19:35,743 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-07-23 15:19:35,743 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:36,086 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:36,086 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:19:36,086 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:19:36,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:19:36,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:19:36,088 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-07-23 15:19:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:36,231 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-23 15:19:36,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:19:36,231 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-07-23 15:19:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:36,232 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:19:36,232 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:19:36,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:19:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:19:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:19:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:19:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:19:36,237 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-07-23 15:19:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:36,237 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:19:36,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:19:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:19:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:19:36,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:36,238 INFO L353 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-07-23 15:19:36,238 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-07-23 15:19:36,238 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:36,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:36,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:19:36,607 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:19:36,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:19:36,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:19:36,609 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-07-23 15:19:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:36,721 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:19:36,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:19:36,721 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-07-23 15:19:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:36,722 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:19:36,722 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:19:36,723 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:19:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:19:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:19:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:19:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:19:36,726 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-07-23 15:19:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:36,727 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:19:36,727 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:19:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:19:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:19:36,728 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:36,728 INFO L353 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-07-23 15:19:36,728 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-07-23 15:19:36,728 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:37,109 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:37,110 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:19:37,110 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:19:37,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:19:37,111 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:19:37,112 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-07-23 15:19:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:37,299 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-23 15:19:37,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:19:37,299 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-07-23 15:19:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:37,300 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:19:37,300 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 15:19:37,301 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:19:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 15:19:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 15:19:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:19:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:19:37,305 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-07-23 15:19:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:37,305 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:19:37,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:19:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:19:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:19:37,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:37,308 INFO L353 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-07-23 15:19:37,308 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-07-23 15:19:37,308 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:37,647 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:37,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:19:37,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:19:37,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:19:37,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:19:37,649 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-07-23 15:19:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:37,774 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:19:37,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:19:37,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-07-23 15:19:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:37,775 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:19:37,775 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:19:37,777 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:19:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:19:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:19:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:19:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:19:37,780 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-07-23 15:19:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:37,781 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:19:37,781 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:19:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:19:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:19:37,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:37,781 INFO L353 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-07-23 15:19:37,782 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-07-23 15:19:37,782 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:38,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:38,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:19:38,293 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:19:38,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:19:38,296 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:19:38,296 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-07-23 15:19:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:38,484 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 15:19:38,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:19:38,484 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-07-23 15:19:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:38,484 INFO L225 Difference]: With dead ends: 124 [2018-07-23 15:19:38,485 INFO L226 Difference]: Without dead ends: 122 [2018-07-23 15:19:38,486 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:19:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-23 15:19:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-23 15:19:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:19:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:19:38,488 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-07-23 15:19:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:38,489 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:19:38,489 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:19:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:19:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:19:38,489 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:38,489 INFO L353 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-07-23 15:19:38,489 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-07-23 15:19:38,490 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:38,863 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:38,863 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:19:38,863 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:19:38,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:19:38,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:19:38,865 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-07-23 15:19:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:39,010 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:19:39,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:19:39,010 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-07-23 15:19:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:39,011 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:19:39,011 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:19:39,012 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:19:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:19:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:19:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:19:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:19:39,016 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-07-23 15:19:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:39,016 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:19:39,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:19:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:19:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:19:39,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:39,017 INFO L353 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-07-23 15:19:39,017 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-07-23 15:19:39,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:39,645 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:39,645 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:19:39,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:19:39,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:19:39,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:19:39,649 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-07-23 15:19:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:39,770 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-23 15:19:39,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:19:39,771 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-07-23 15:19:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:39,772 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:19:39,772 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:19:39,774 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:19:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:19:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:19:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:19:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:19:39,780 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-07-23 15:19:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:39,780 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:19:39,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:19:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:19:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:19:39,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:39,781 INFO L353 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-07-23 15:19:39,781 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-07-23 15:19:39,782 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:40,308 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:40,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:19:40,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:19:40,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:19:40,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:19:40,310 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-07-23 15:19:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:40,466 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:19:40,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:19:40,466 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-07-23 15:19:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:40,467 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:19:40,467 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:19:40,469 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:19:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:19:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:19:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:19:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:19:40,473 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-07-23 15:19:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:40,473 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:19:40,473 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:19:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:19:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:19:40,474 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:40,474 INFO L353 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-07-23 15:19:40,474 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-07-23 15:19:40,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:40,901 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:40,902 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:19:40,902 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:19:40,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:19:40,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:19:40,904 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-07-23 15:19:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:41,061 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-23 15:19:41,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:19:41,062 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-07-23 15:19:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:41,062 INFO L225 Difference]: With dead ends: 128 [2018-07-23 15:19:41,062 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 15:19:41,064 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:19:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 15:19:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 15:19:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:19:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:19:41,068 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-07-23 15:19:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:41,068 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:19:41,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:19:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:19:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:19:41,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:41,069 INFO L353 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-07-23 15:19:41,070 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-07-23 15:19:41,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:41,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:41,633 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:19:41,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:19:41,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:19:41,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:19:41,636 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-07-23 15:19:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:41,860 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:19:41,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:19:41,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-07-23 15:19:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:41,861 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:19:41,861 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:19:41,863 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:19:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:19:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:19:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:19:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:19:41,867 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-07-23 15:19:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:41,867 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:19:41,867 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:19:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:19:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:19:41,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:41,868 INFO L353 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-07-23 15:19:41,868 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-07-23 15:19:41,868 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,378 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,378 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:19:42,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:19:42,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:19:42,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:19:42,380 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-07-23 15:19:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,538 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 15:19:42,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:19:42,538 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-07-23 15:19:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,539 INFO L225 Difference]: With dead ends: 130 [2018-07-23 15:19:42,539 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 15:19:42,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:19:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 15:19:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 15:19:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:19:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:19:42,543 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-07-23 15:19:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,543 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:19:42,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:19:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:19:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:19:42,544 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,544 INFO L353 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-07-23 15:19:42,544 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-07-23 15:19:42,544 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,985 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,985 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:19:42,985 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:19:42,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:19:42,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:19:42,987 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-07-23 15:19:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,190 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:19:43,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:19:43,190 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-07-23 15:19:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,191 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:19:43,191 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:19:43,192 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:19:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:19:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:19:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:19:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:19:43,196 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-07-23 15:19:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,196 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:19:43,196 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:19:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:19:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:19:43,197 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,197 INFO L353 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-07-23 15:19:43,197 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-07-23 15:19:43,198 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:43,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:19:43,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:19:43,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:19:43,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:19:43,590 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-07-23 15:19:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,699 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-23 15:19:43,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:19:43,699 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-07-23 15:19:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,700 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:19:43,700 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:19:43,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:19:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:19:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:19:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:19:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:19:43,706 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-07-23 15:19:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,706 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:19:43,706 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:19:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:19:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:19:43,707 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,707 INFO L353 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-07-23 15:19:43,707 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-07-23 15:19:43,707 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:44,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:19:44,138 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:19:44,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:19:44,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:19:44,140 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-07-23 15:19:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,327 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:19:44,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:19:44,328 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-07-23 15:19:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,328 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:19:44,329 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:19:44,330 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:19:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:19:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:19:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:19:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:19:44,334 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-07-23 15:19:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,334 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:19:44,334 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:19:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:19:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:19:44,335 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,335 INFO L353 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-07-23 15:19:44,336 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-07-23 15:19:44,336 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:44,839 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:19:44,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:19:44,841 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:19:44,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:19:44,842 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-07-23 15:19:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,932 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-23 15:19:44,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:19:44,932 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-07-23 15:19:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,933 INFO L225 Difference]: With dead ends: 134 [2018-07-23 15:19:44,933 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 15:19:44,935 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:19:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 15:19:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 15:19:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:19:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:19:44,939 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-07-23 15:19:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,939 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:19:44,939 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:19:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:19:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:19:44,940 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,940 INFO L353 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-07-23 15:19:44,940 INFO L414 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-07-23 15:19:44,940 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:45,476 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:19:45,476 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:19:45,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:19:45,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:19:45,480 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-07-23 15:19:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,668 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:19:45,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:19:45,668 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-07-23 15:19:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,669 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:19:45,669 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:19:45,671 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:19:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:19:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:19:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:19:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:19:45,676 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-07-23 15:19:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,676 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:19:45,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:19:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:19:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:19:45,677 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,678 INFO L353 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-07-23 15:19:45,678 INFO L414 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-07-23 15:19:45,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:46,223 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:46,223 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:19:46,224 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:19:46,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:19:46,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:19:46,226 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-07-23 15:19:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,416 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 15:19:46,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:19:46,417 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-07-23 15:19:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,417 INFO L225 Difference]: With dead ends: 136 [2018-07-23 15:19:46,417 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 15:19:46,419 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:19:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 15:19:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-23 15:19:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:19:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:19:46,422 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-07-23 15:19:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,422 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:19:46,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:19:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:19:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:19:46,423 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,423 INFO L353 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-07-23 15:19:46,423 INFO L414 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-07-23 15:19:46,424 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:47,080 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,080 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:19:47,080 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:19:47,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:19:47,083 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:19:47,083 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-07-23 15:19:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:47,313 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:19:47,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:19:47,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-07-23 15:19:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:47,313 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:19:47,314 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:19:47,316 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:19:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:19:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:19:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:19:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:19:47,318 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-07-23 15:19:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:47,319 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:19:47,319 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:19:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:19:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:19:47,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:47,319 INFO L353 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-07-23 15:19:47,319 INFO L414 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-07-23 15:19:47,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:47,821 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:19:47,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:19:47,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:19:47,824 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:19:47,824 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-07-23 15:19:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,130 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-23 15:19:48,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:19:48,130 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-07-23 15:19:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,131 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:19:48,131 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:19:48,133 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:19:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:19:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:19:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:19:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:19:48,136 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-07-23 15:19:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,137 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:19:48,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:19:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:19:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:19:48,138 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,138 INFO L353 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-07-23 15:19:48,138 INFO L414 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-07-23 15:19:48,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:48,644 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:48,644 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:19:48,644 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:19:48,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:19:48,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:19:48,647 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-07-23 15:19:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,816 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:19:48,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:19:48,816 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-07-23 15:19:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,816 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:19:48,816 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:19:48,818 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:19:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:19:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:19:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:19:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:19:48,821 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-07-23 15:19:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,821 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:19:48,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:19:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:19:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:19:48,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,822 INFO L353 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-07-23 15:19:48,822 INFO L414 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-07-23 15:19:48,823 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:49,316 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:49,316 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:19:49,316 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:19:49,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:19:49,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:19:49,319 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-07-23 15:19:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:49,535 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-23 15:19:49,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:19:49,536 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-07-23 15:19:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:49,536 INFO L225 Difference]: With dead ends: 140 [2018-07-23 15:19:49,536 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 15:19:49,538 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:19:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 15:19:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 15:19:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:19:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:19:49,541 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-07-23 15:19:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:49,541 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:19:49,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:19:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:19:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:19:49,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:49,542 INFO L353 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-07-23 15:19:49,542 INFO L414 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:49,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-07-23 15:19:49,543 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:50,071 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:19:50,072 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:19:50,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:19:50,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:19:50,074 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-07-23 15:19:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:50,316 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:19:50,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:19:50,317 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-07-23 15:19:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:50,317 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:19:50,318 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:19:50,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:19:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:19:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:19:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:19:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:19:50,323 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-07-23 15:19:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:50,323 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:19:50,323 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:19:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:19:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:19:50,324 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:50,324 INFO L353 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-07-23 15:19:50,324 INFO L414 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-07-23 15:19:50,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:50,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:19:50,799 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:19:50,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:19:50,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:19:50,801 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-07-23 15:19:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:51,062 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 15:19:51,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:19:51,062 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-07-23 15:19:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:51,063 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:19:51,063 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 15:19:51,065 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:19:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 15:19:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 15:19:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:19:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:19:51,068 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-07-23 15:19:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:51,069 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:19:51,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:19:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:19:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:19:51,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:51,070 INFO L353 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-07-23 15:19:51,070 INFO L414 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-07-23 15:19:51,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:51,634 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:51,635 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:19:51,635 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:19:51,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:19:51,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:19:51,638 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-07-23 15:19:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:51,753 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:19:51,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:19:51,753 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-07-23 15:19:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:51,754 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:19:51,754 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:19:51,756 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:19:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:19:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:19:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:19:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:19:51,759 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-07-23 15:19:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:51,760 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:19:51,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:19:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:19:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:19:51,760 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:51,761 INFO L353 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-07-23 15:19:51,761 INFO L414 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-07-23 15:19:51,761 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:52,264 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:52,264 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:19:52,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:19:52,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:19:52,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:19:52,268 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-07-23 15:19:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:52,554 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-23 15:19:52,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:19:52,555 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-07-23 15:19:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:52,555 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:19:52,555 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:19:52,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:19:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:19:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:19:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:19:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:19:52,560 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-07-23 15:19:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:52,560 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:19:52,560 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:19:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:19:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:19:52,561 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:52,561 INFO L353 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-07-23 15:19:52,561 INFO L414 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-07-23 15:19:52,561 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:53,098 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:53,098 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:19:53,098 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:19:53,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:19:53,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:19:53,101 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-07-23 15:19:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:53,391 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:19:53,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:19:53,392 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-07-23 15:19:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:53,392 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:19:53,392 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:19:53,394 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:19:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:19:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:19:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:19:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:19:53,396 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-07-23 15:19:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:53,396 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:19:53,396 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:19:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:19:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:19:53,397 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:53,397 INFO L353 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-07-23 15:19:53,397 INFO L414 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-07-23 15:19:53,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:54,193 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:54,193 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:19:54,193 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:19:54,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:19:54,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:19:54,195 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-07-23 15:19:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:54,476 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-23 15:19:54,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:19:54,476 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-07-23 15:19:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:54,477 INFO L225 Difference]: With dead ends: 146 [2018-07-23 15:19:54,477 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 15:19:54,478 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:19:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 15:19:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 15:19:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:19:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:19:54,480 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-07-23 15:19:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:54,481 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:19:54,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:19:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:19:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:19:54,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:54,481 INFO L353 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-07-23 15:19:54,481 INFO L414 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-07-23 15:19:54,481 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:54,982 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:54,982 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:19:54,983 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:19:54,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:19:54,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:19:54,985 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-07-23 15:19:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:55,174 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:19:55,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:19:55,174 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-07-23 15:19:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:55,175 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:19:55,175 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:19:55,176 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:19:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:19:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:19:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:19:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:19:55,179 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-07-23 15:19:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:55,179 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:19:55,179 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:19:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:19:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:19:55,179 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:55,179 INFO L353 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-07-23 15:19:55,179 INFO L414 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-07-23 15:19:55,180 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:55,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:55,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:19:55,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:19:55,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:19:55,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:19:55,701 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-07-23 15:19:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:55,831 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 15:19:55,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:19:55,831 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-07-23 15:19:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:55,831 INFO L225 Difference]: With dead ends: 148 [2018-07-23 15:19:55,832 INFO L226 Difference]: Without dead ends: 146 [2018-07-23 15:19:55,833 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:19:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-23 15:19:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-23 15:19:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:19:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:19:55,836 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-07-23 15:19:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:55,836 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:19:55,836 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:19:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:19:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:19:55,836 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:55,836 INFO L353 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-07-23 15:19:55,837 INFO L414 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-07-23 15:19:55,837 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:56,601 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:56,601 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:19:56,602 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:19:56,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:19:56,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:19:56,607 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-07-23 15:19:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:56,906 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:19:56,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:19:56,906 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-07-23 15:19:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:56,907 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:19:56,907 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:19:56,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:19:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:19:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:19:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:19:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:19:56,912 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-07-23 15:19:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:56,912 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:19:56,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:19:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:19:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:19:56,913 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:56,913 INFO L353 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-07-23 15:19:56,913 INFO L414 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-07-23 15:19:56,913 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:57,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:57,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:19:57,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:19:57,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:19:57,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:19:57,640 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-07-23 15:19:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:57,981 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-23 15:19:57,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:19:57,982 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-07-23 15:19:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:57,982 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:19:57,982 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:19:57,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:19:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:19:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:19:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:19:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:19:57,986 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-07-23 15:19:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:57,987 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:19:57,987 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:19:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:19:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:19:57,987 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:57,987 INFO L353 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-07-23 15:19:57,987 INFO L414 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-07-23 15:19:57,988 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:58,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:58,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:19:58,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:19:58,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:19:58,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:19:58,622 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-07-23 15:19:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:58,944 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:19:58,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:19:58,944 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-07-23 15:19:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:58,945 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:19:58,945 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:19:58,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:19:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:19:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:19:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:19:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:19:58,948 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-07-23 15:19:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:58,948 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:19:58,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:19:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:19:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:19:58,949 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:58,949 INFO L353 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-07-23 15:19:58,949 INFO L414 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-07-23 15:19:58,950 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:59,438 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:59,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:19:59,438 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:19:59,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:19:59,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:19:59,441 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-07-23 15:19:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:59,730 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-23 15:19:59,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:19:59,731 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-07-23 15:19:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:59,731 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:19:59,731 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 15:19:59,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:19:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 15:19:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 15:19:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:19:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:19:59,737 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-07-23 15:19:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:59,738 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:19:59,738 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:19:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:19:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:19:59,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:59,739 INFO L353 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-07-23 15:19:59,739 INFO L414 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:59,739 INFO L82 PathProgramCache]: Analyzing trace with hash -429428447, now seen corresponding path program 146 times [2018-07-23 15:19:59,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:00,339 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:00,339 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:20:00,339 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:20:00,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:20:00,342 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:20:00,342 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-07-23 15:20:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:00,733 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:20:00,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:20:00,734 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-07-23 15:20:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:00,734 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:20:00,734 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:20:00,737 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:20:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:20:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:20:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:20:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:20:00,741 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-07-23 15:20:00,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:00,741 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:20:00,741 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:20:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:20:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:20:00,742 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:00,742 INFO L353 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-07-23 15:20:00,742 INFO L414 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:00,743 INFO L82 PathProgramCache]: Analyzing trace with hash -427381944, now seen corresponding path program 147 times [2018-07-23 15:20:00,743 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:01,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:01,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:20:01,382 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:20:01,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:20:01,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:20:01,386 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-07-23 15:20:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:01,824 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 15:20:01,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:20:01,824 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-07-23 15:20:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:01,825 INFO L225 Difference]: With dead ends: 154 [2018-07-23 15:20:01,825 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 15:20:01,827 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:20:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 15:20:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 15:20:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:20:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:20:01,831 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-07-23 15:20:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:01,831 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:20:01,831 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:20:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:20:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:20:01,832 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:01,832 INFO L353 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-07-23 15:20:01,832 INFO L414 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:01,832 INFO L82 PathProgramCache]: Analyzing trace with hash -363940351, now seen corresponding path program 148 times [2018-07-23 15:20:01,832 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:02,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:02,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:20:02,535 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:20:02,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:20:02,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:20:02,539 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-07-23 15:20:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:02,952 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:20:02,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:20:02,952 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-07-23 15:20:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:02,953 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:20:02,953 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:20:02,955 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:20:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:20:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:20:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:20:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:20:02,958 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-07-23 15:20:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:02,958 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:20:02,958 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:20:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:20:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:20:02,959 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:02,959 INFO L353 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-07-23 15:20:02,959 INFO L414 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1602749032, now seen corresponding path program 149 times [2018-07-23 15:20:02,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:03,769 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:03,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:20:03,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:20:03,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:20:03,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:20:03,772 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-07-23 15:20:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:04,227 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-23 15:20:04,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:20:04,227 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-07-23 15:20:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:04,227 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:20:04,228 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:20:04,229 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:20:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:20:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:20:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:20:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:20:04,232 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-07-23 15:20:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:04,232 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:20:04,232 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:20:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:20:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:20:04,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:04,233 INFO L353 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-07-23 15:20:04,233 INFO L414 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1854389535, now seen corresponding path program 150 times [2018-07-23 15:20:04,233 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:04,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:04,782 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:20:04,782 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:20:04,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:20:04,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:20:04,786 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-07-23 15:20:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:05,168 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:20:05,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:20:05,168 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-07-23 15:20:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:05,169 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:20:05,169 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:20:05,171 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:20:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:20:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:20:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:20:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:20:05,174 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-07-23 15:20:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:05,175 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:20:05,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:20:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:20:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:20:05,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:05,176 INFO L353 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-07-23 15:20:05,176 INFO L414 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:05,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1651502712, now seen corresponding path program 151 times [2018-07-23 15:20:05,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:05,733 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:05,734 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:20:05,734 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:20:05,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:20:05,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:20:05,737 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-07-23 15:20:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:06,196 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-23 15:20:06,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:20:06,196 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-07-23 15:20:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:06,197 INFO L225 Difference]: With dead ends: 158 [2018-07-23 15:20:06,197 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 15:20:06,199 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:20:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 15:20:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 15:20:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:20:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:20:06,201 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-07-23 15:20:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:06,202 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:20:06,202 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:20:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:20:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:20:06,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:06,203 INFO L353 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-07-23 15:20:06,203 INFO L414 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash 343021505, now seen corresponding path program 152 times [2018-07-23 15:20:06,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:06,834 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:06,834 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:20:06,834 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:20:06,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:20:06,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:20:06,837 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-07-23 15:20:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:07,224 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:20:07,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:20:07,224 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-07-23 15:20:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:07,225 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:20:07,225 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:20:07,227 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:20:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:20:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:20:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:20:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:20:07,230 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-07-23 15:20:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:07,230 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:20:07,231 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:20:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:20:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:20:07,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:07,232 INFO L353 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-07-23 15:20:07,232 INFO L414 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2043730088, now seen corresponding path program 153 times [2018-07-23 15:20:07,232 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:07,871 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:07,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:20:07,871 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:20:07,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:20:07,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:20:07,875 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-07-23 15:20:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:08,225 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 15:20:08,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:20:08,225 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-07-23 15:20:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:08,225 INFO L225 Difference]: With dead ends: 160 [2018-07-23 15:20:08,225 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 15:20:08,227 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:20:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 15:20:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-23 15:20:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:20:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:20:08,230 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-07-23 15:20:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:08,230 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:20:08,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:20:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:20:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:20:08,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:08,231 INFO L353 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-07-23 15:20:08,231 INFO L414 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1068878687, now seen corresponding path program 154 times [2018-07-23 15:20:08,232 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:08,851 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:08,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:20:08,852 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:20:08,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:20:08,856 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:20:08,856 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-07-23 15:20:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:09,245 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:20:09,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:20:09,245 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-07-23 15:20:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:09,246 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:20:09,246 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:20:09,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:20:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:20:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:20:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:20:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:20:09,250 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-07-23 15:20:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:09,250 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:20:09,250 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:20:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:20:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:20:09,251 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:09,251 INFO L353 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-07-23 15:20:09,251 INFO L414 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1224497096, now seen corresponding path program 155 times [2018-07-23 15:20:09,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:09,901 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:09,901 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:20:09,902 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:20:09,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:20:09,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:20:09,905 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-07-23 15:20:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:10,223 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-23 15:20:10,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:20:10,224 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-07-23 15:20:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:10,224 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:20:10,224 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:20:10,226 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:20:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:20:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:20:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:20:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:20:10,229 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-07-23 15:20:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:10,229 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:20:10,229 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:20:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:20:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:20:10,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:10,230 INFO L353 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-07-23 15:20:10,230 INFO L414 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash -695297663, now seen corresponding path program 156 times [2018-07-23 15:20:10,230 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:10,932 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:10,933 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:20:10,933 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:20:10,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:20:10,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:20:10,937 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-07-23 15:20:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:11,079 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:20:11,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:20:11,079 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-07-23 15:20:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:11,079 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:20:11,079 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:20:11,081 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:20:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:20:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:20:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:20:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:20:11,083 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-07-23 15:20:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:11,084 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:20:11,084 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:20:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:20:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:20:11,085 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:11,085 INFO L353 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-07-23 15:20:11,085 INFO L414 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -79393048, now seen corresponding path program 157 times [2018-07-23 15:20:11,085 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:11,783 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:11,783 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:20:11,783 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:20:11,785 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:20:11,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:20:11,787 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-07-23 15:20:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:12,069 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-23 15:20:12,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:20:12,069 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-07-23 15:20:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:12,070 INFO L225 Difference]: With dead ends: 164 [2018-07-23 15:20:12,070 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 15:20:12,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:20:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 15:20:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 15:20:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:20:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:20:12,074 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-07-23 15:20:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:12,074 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:20:12,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:20:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:20:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:20:12,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:12,075 INFO L353 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-07-23 15:20:12,075 INFO L414 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:12,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1833780833, now seen corresponding path program 158 times [2018-07-23 15:20:12,075 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:12,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:12,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:20:12,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:20:12,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:20:12,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:20:12,816 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-07-23 15:20:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:13,351 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:20:13,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:20:13,351 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-07-23 15:20:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:13,352 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:20:13,352 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:20:13,354 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:20:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:20:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:20:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:20:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:20:13,357 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-07-23 15:20:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:13,357 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:20:13,357 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:20:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:20:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:20:13,358 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:13,358 INFO L353 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-07-23 15:20:13,358 INFO L414 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1012629000, now seen corresponding path program 159 times [2018-07-23 15:20:13,359 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:14,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:14,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:20:14,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:20:14,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:20:14,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:20:14,109 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-07-23 15:20:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:14,606 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 15:20:14,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:20:14,607 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-07-23 15:20:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:14,607 INFO L225 Difference]: With dead ends: 166 [2018-07-23 15:20:14,607 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 15:20:14,609 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:20:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 15:20:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 15:20:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:20:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:20:14,613 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-07-23 15:20:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:14,613 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:20:14,613 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:20:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:20:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:20:14,614 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:14,614 INFO L353 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-07-23 15:20:14,614 INFO L414 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1326725953, now seen corresponding path program 160 times [2018-07-23 15:20:14,615 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:15,310 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:15,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:20:15,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:20:15,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:20:15,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:20:15,314 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-07-23 15:20:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:15,747 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:20:15,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:20:15,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-07-23 15:20:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:15,748 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:20:15,748 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:20:15,750 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:20:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:20:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:20:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:20:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:20:15,752 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-07-23 15:20:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:15,753 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:20:15,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:20:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:20:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:20:15,753 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:15,754 INFO L353 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-07-23 15:20:15,754 INFO L414 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1821170392, now seen corresponding path program 161 times [2018-07-23 15:20:15,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:16,511 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:16,511 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:20:16,511 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:20:16,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:20:16,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:20:16,515 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-07-23 15:20:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:16,715 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-23 15:20:16,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:20:16,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-07-23 15:20:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:16,715 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:20:16,716 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:20:16,719 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:20:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:20:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:20:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:20:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:20:16,722 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-07-23 15:20:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:16,722 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:20:16,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:20:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:20:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:20:16,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:16,723 INFO L353 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-07-23 15:20:16,723 INFO L414 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -621709279, now seen corresponding path program 162 times [2018-07-23 15:20:16,724 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:17,548 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:17,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:20:17,549 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:20:17,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:20:17,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:20:17,553 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-07-23 15:20:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:17,927 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:20:17,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:20:17,927 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-07-23 15:20:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:17,927 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:20:17,927 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:20:17,929 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:20:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:20:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:20:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:20:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:20:17,932 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-07-23 15:20:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:17,932 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:20:17,932 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:20:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:20:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:20:17,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:17,933 INFO L353 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-07-23 15:20:17,933 INFO L414 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2093120440, now seen corresponding path program 163 times [2018-07-23 15:20:17,933 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:18,608 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:18,609 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:20:18,609 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:20:18,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:20:18,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:20:18,613 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-07-23 15:20:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:19,151 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-23 15:20:19,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:20:19,151 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-07-23 15:20:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:19,151 INFO L225 Difference]: With dead ends: 170 [2018-07-23 15:20:19,151 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 15:20:19,154 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:20:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 15:20:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 15:20:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:20:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:20:19,156 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-07-23 15:20:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:19,156 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:20:19,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:20:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:20:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:20:19,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:19,157 INFO L353 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-07-23 15:20:19,157 INFO L414 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -462226175, now seen corresponding path program 164 times [2018-07-23 15:20:19,157 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:19,935 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:19,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:20:19,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:20:19,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:20:19,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:20:19,940 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-07-23 15:20:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:20,477 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:20:20,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:20:20,477 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-07-23 15:20:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:20,477 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:20:20,477 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:20:20,481 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:20:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:20:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:20:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:20:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:20:20,484 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-07-23 15:20:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:20,484 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:20:20,484 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:20:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:20:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:20:20,485 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:20,485 INFO L353 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-07-23 15:20:20,485 INFO L414 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1444111512, now seen corresponding path program 165 times [2018-07-23 15:20:20,485 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:21,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:21,354 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:20:21,354 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:20:21,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:20:21,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:20:21,359 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-07-23 15:20:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:21,628 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 15:20:21,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:20:21,628 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-07-23 15:20:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:21,629 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:20:21,629 INFO L226 Difference]: Without dead ends: 170 [2018-07-23 15:20:21,632 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:20:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-23 15:20:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-23 15:20:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:20:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:20:21,635 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-07-23 15:20:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:21,636 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:20:21,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:20:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:20:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:20:21,637 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:21,637 INFO L353 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-07-23 15:20:21,637 INFO L414 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1817785887, now seen corresponding path program 166 times [2018-07-23 15:20:21,637 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:22,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:22,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:20:22,574 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:20:22,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:20:22,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:20:22,580 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-07-23 15:20:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:23,245 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:20:23,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:20:23,245 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-07-23 15:20:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:23,246 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:20:23,246 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:20:23,250 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:20:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:20:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:20:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:20:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:20:23,253 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-07-23 15:20:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:23,253 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:20:23,253 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:20:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:20:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:20:23,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:23,254 INFO L353 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-07-23 15:20:23,254 INFO L414 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash -516789624, now seen corresponding path program 167 times [2018-07-23 15:20:23,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:24,086 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:24,087 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:20:24,087 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:20:24,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:20:24,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:20:24,093 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-07-23 15:20:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:24,589 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-23 15:20:24,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:20:24,589 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-07-23 15:20:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:24,590 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:20:24,590 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:20:24,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:20:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:20:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:20:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:20:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:20:24,596 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-07-23 15:20:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:24,596 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:20:24,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:20:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:20:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:20:24,596 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:24,597 INFO L353 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-07-23 15:20:24,597 INFO L414 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1159388865, now seen corresponding path program 168 times [2018-07-23 15:20:24,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:25,470 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:25,470 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:20:25,470 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:20:25,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:20:25,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:20:25,477 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-07-23 15:20:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:25,774 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:20:25,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:20:25,774 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-07-23 15:20:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:25,775 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:20:25,775 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:20:25,778 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:20:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:20:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:20:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:20:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:20:25,780 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-07-23 15:20:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:25,780 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:20:25,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:20:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:20:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:20:25,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:25,781 INFO L353 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-07-23 15:20:25,781 INFO L414 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1581314472, now seen corresponding path program 169 times [2018-07-23 15:20:25,781 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:26,698 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:26,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:20:26,699 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:20:26,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:20:26,701 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:20:26,701 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-07-23 15:20:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:27,449 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-23 15:20:27,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:20:27,449 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-07-23 15:20:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:27,450 INFO L225 Difference]: With dead ends: 176 [2018-07-23 15:20:27,450 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 15:20:27,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:20:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 15:20:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 15:20:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:20:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:20:27,454 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-07-23 15:20:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:27,454 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:20:27,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:20:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:20:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:20:27,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:27,455 INFO L353 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-07-23 15:20:27,455 INFO L414 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1776106401, now seen corresponding path program 170 times [2018-07-23 15:20:27,455 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:28,319 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:28,319 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:20:28,319 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:20:28,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:20:28,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:20:28,326 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-07-23 15:20:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:28,579 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:20:28,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:20:28,580 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-07-23 15:20:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:28,580 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:20:28,580 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:20:28,583 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:20:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:20:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:20:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:20:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:20:28,586 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-07-23 15:20:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:28,586 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:20:28,586 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:20:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:20:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:20:28,587 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:28,587 INFO L353 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-07-23 15:20:28,587 INFO L414 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash -775278392, now seen corresponding path program 171 times [2018-07-23 15:20:28,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:29,469 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:29,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:20:29,469 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:20:29,472 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:20:29,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:20:29,475 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-07-23 15:20:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:30,235 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 15:20:30,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:20:30,235 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-07-23 15:20:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:30,235 INFO L225 Difference]: With dead ends: 178 [2018-07-23 15:20:30,236 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 15:20:30,240 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:20:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 15:20:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 15:20:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:20:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:20:30,243 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-07-23 15:20:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:30,244 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:20:30,244 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:20:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:20:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:20:30,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:30,245 INFO L353 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-07-23 15:20:30,245 INFO L414 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1736171649, now seen corresponding path program 172 times [2018-07-23 15:20:30,245 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:31,146 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:31,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:20:31,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:20:31,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:20:31,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:20:31,152 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-07-23 15:20:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:31,689 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:20:31,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:20:31,689 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-07-23 15:20:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:31,689 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:20:31,690 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:20:31,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:20:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:20:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:20:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:20:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:20:31,696 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-07-23 15:20:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:31,697 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:20:31,697 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:20:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:20:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:20:31,698 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:31,698 INFO L353 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-07-23 15:20:31,698 INFO L414 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2013255704, now seen corresponding path program 173 times [2018-07-23 15:20:31,698 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:32,629 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:32,629 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:20:32,629 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:20:32,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:20:32,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:20:32,634 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 176 states. [2018-07-23 15:20:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:33,244 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-23 15:20:33,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:20:33,244 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 176 [2018-07-23 15:20:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:33,245 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:20:33,245 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:20:33,247 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:20:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:20:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:20:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:20:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:20:33,249 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-07-23 15:20:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:33,249 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:20:33,250 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:20:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:20:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:20:33,250 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:33,250 INFO L353 BasicCegarLoop]: trace histogram [174, 1, 1, 1] [2018-07-23 15:20:33,250 INFO L414 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2013580641, now seen corresponding path program 174 times [2018-07-23 15:20:33,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:34,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:34,153 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:20:34,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:20:34,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:20:34,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:20:34,159 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 177 states. [2018-07-23 15:20:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:34,821 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:20:34,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:20:34,821 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 177 [2018-07-23 15:20:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:34,822 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:20:34,822 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:20:34,826 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:20:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:20:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:20:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:20:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:20:34,830 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 177 [2018-07-23 15:20:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:34,831 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:20:34,831 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:20:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:20:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:20:34,831 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:34,831 INFO L353 BasicCegarLoop]: trace histogram [175, 1, 1, 1] [2018-07-23 15:20:34,832 INFO L414 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:34,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2003511544, now seen corresponding path program 175 times [2018-07-23 15:20:34,832 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:35,757 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:35,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:20:35,758 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:20:35,761 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:20:35,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:20:35,765 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 178 states. [2018-07-23 15:20:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:36,341 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-23 15:20:36,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:20:36,341 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-07-23 15:20:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:36,341 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:20:36,342 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 15:20:36,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:20:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 15:20:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 15:20:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:20:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:20:36,349 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 178 [2018-07-23 15:20:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:36,350 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:20:36,350 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:20:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:20:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:20:36,351 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:36,351 INFO L353 BasicCegarLoop]: trace histogram [176, 1, 1, 1] [2018-07-23 15:20:36,351 INFO L414 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1979317695, now seen corresponding path program 176 times [2018-07-23 15:20:36,351 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:37,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:37,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:20:37,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:20:37,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:20:37,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:20:37,426 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 179 states. [2018-07-23 15:20:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:37,982 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:20:37,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:20:37,982 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 179 [2018-07-23 15:20:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:37,982 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:20:37,983 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:20:37,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:20:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:20:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:20:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:20:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:20:37,987 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 179 [2018-07-23 15:20:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:37,987 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:20:37,987 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:20:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:20:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:20:37,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:37,988 INFO L353 BasicCegarLoop]: trace histogram [177, 1, 1, 1] [2018-07-23 15:20:37,988 INFO L414 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1229308376, now seen corresponding path program 177 times [2018-07-23 15:20:37,989 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:38,945 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:38,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:20:38,946 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:20:38,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:20:38,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:20:38,952 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 180 states. [2018-07-23 15:20:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:39,777 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 15:20:39,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:20:39,778 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 180 [2018-07-23 15:20:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:39,778 INFO L225 Difference]: With dead ends: 184 [2018-07-23 15:20:39,778 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 15:20:39,781 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:20:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 15:20:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-23 15:20:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:20:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:20:39,784 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 180 [2018-07-23 15:20:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:39,785 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:20:39,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:20:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:20:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:20:39,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:39,785 INFO L353 BasicCegarLoop]: trace histogram [178, 1, 1, 1] [2018-07-23 15:20:39,785 INFO L414 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 546144033, now seen corresponding path program 178 times [2018-07-23 15:20:39,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:40,728 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:40,728 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:20:40,728 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:20:40,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:20:40,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:20:40,735 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 181 states. [2018-07-23 15:20:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:41,049 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:20:41,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:20:41,049 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 181 [2018-07-23 15:20:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:41,050 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:20:41,050 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:20:41,054 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:20:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:20:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:20:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:20:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:20:41,056 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 181 [2018-07-23 15:20:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:41,057 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:20:41,057 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:20:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:20:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:20:41,058 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:41,058 INFO L353 BasicCegarLoop]: trace histogram [179, 1, 1, 1] [2018-07-23 15:20:41,058 INFO L414 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash -249406136, now seen corresponding path program 179 times [2018-07-23 15:20:41,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:41,995 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:41,995 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:20:41,996 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:20:41,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:20:42,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:20:42,001 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 182 states. [2018-07-23 15:20:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:42,916 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-07-23 15:20:42,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:20:42,917 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 182 [2018-07-23 15:20:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:42,917 INFO L225 Difference]: With dead ends: 186 [2018-07-23 15:20:42,917 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:20:42,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:20:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:20:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-23 15:20:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:20:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-23 15:20:42,922 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 182 [2018-07-23 15:20:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:42,922 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-23 15:20:42,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:20:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-23 15:20:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:20:42,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:42,923 INFO L353 BasicCegarLoop]: trace histogram [180, 1, 1, 1] [2018-07-23 15:20:42,923 INFO L414 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 858342401, now seen corresponding path program 180 times [2018-07-23 15:20:42,924 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:43,849 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:43,849 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:20:43,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:20:43,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:20:43,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:20:43,855 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 183 states. [2018-07-23 15:20:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:44,166 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:20:44,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:20:44,166 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 183 [2018-07-23 15:20:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:44,167 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:20:44,167 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:20:44,171 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:20:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:20:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:20:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:20:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:20:44,175 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 183 [2018-07-23 15:20:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:44,175 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:20:44,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:20:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:20:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:20:44,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:44,176 INFO L353 BasicCegarLoop]: trace histogram [181, 1, 1, 1] [2018-07-23 15:20:44,176 INFO L414 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 838808680, now seen corresponding path program 181 times [2018-07-23 15:20:44,177 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:45,171 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:45,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:20:45,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:20:45,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:20:45,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:20:45,178 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 184 states. [2018-07-23 15:20:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:46,048 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-07-23 15:20:46,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:20:46,049 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 184 [2018-07-23 15:20:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:46,049 INFO L225 Difference]: With dead ends: 188 [2018-07-23 15:20:46,049 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 15:20:46,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:20:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 15:20:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-23 15:20:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:20:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-23 15:20:46,055 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 184 [2018-07-23 15:20:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:46,056 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-23 15:20:46,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:20:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-23 15:20:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:20:46,056 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:46,056 INFO L353 BasicCegarLoop]: trace histogram [182, 1, 1, 1] [2018-07-23 15:20:46,056 INFO L414 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash 233263329, now seen corresponding path program 182 times [2018-07-23 15:20:46,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:47,041 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:47,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-23 15:20:47,042 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:20:47,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:20:47,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:20:47,048 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 185 states. [2018-07-23 15:20:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:47,979 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:20:47,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:20:47,979 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 185 [2018-07-23 15:20:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:47,980 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:20:47,980 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:20:47,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:20:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:20:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:20:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:20:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-23 15:20:47,987 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 185 [2018-07-23 15:20:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:47,987 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-23 15:20:47,987 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:20:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-23 15:20:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:20:47,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:47,988 INFO L353 BasicCegarLoop]: trace histogram [183, 1, 1, 1] [2018-07-23 15:20:47,988 INFO L414 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1358773368, now seen corresponding path program 183 times [2018-07-23 15:20:47,988 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:49,032 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:49,032 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:20:49,032 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:20:49,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:20:49,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:20:49,037 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 186 states. [2018-07-23 15:20:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:49,313 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-23 15:20:49,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:20:49,313 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 186 [2018-07-23 15:20:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:49,314 INFO L225 Difference]: With dead ends: 190 [2018-07-23 15:20:49,314 INFO L226 Difference]: Without dead ends: 188 [2018-07-23 15:20:49,317 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:20:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-23 15:20:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-07-23 15:20:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 15:20:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 15:20:49,319 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 186 [2018-07-23 15:20:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:49,319 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 15:20:49,319 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:20:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 15:20:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 15:20:49,320 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:49,320 INFO L353 BasicCegarLoop]: trace histogram [184, 1, 1, 1] [2018-07-23 15:20:49,320 INFO L414 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 827696577, now seen corresponding path program 184 times [2018-07-23 15:20:49,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:50,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:50,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-23 15:20:50,289 INFO L450 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-23 15:20:50,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-23 15:20:50,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:20:50,295 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 187 states. [2018-07-23 15:20:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:51,157 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:20:51,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-23 15:20:51,157 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 187 [2018-07-23 15:20:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:51,157 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:20:51,157 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:20:51,162 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:20:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:20:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:20:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:20:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-23 15:20:51,165 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 187 [2018-07-23 15:20:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:51,165 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-23 15:20:51,165 INFO L472 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-23 15:20:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-23 15:20:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:20:51,166 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:51,166 INFO L353 BasicCegarLoop]: trace histogram [185, 1, 1, 1] [2018-07-23 15:20:51,167 INFO L414 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash -111211864, now seen corresponding path program 185 times [2018-07-23 15:20:51,167 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:52,245 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:52,245 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:20:52,245 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:20:52,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:20:52,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:20:52,251 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 188 states. [2018-07-23 15:20:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:53,292 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-07-23 15:20:53,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:20:53,293 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 188 [2018-07-23 15:20:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:53,293 INFO L225 Difference]: With dead ends: 192 [2018-07-23 15:20:53,293 INFO L226 Difference]: Without dead ends: 190 [2018-07-23 15:20:53,297 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:20:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-23 15:20:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-07-23 15:20:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 15:20:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-07-23 15:20:53,299 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 188 [2018-07-23 15:20:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:53,299 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-07-23 15:20:53,299 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:20:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-07-23 15:20:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 15:20:53,300 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:53,300 INFO L353 BasicCegarLoop]: trace histogram [186, 1, 1, 1] [2018-07-23 15:20:53,300 INFO L414 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash 847397537, now seen corresponding path program 186 times [2018-07-23 15:20:53,300 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:54,343 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:54,343 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-23 15:20:54,343 INFO L450 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-23 15:20:54,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-23 15:20:54,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:20:54,349 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 189 states. [2018-07-23 15:20:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:54,738 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 15:20:54,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-23 15:20:54,738 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 189 [2018-07-23 15:20:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:54,739 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:20:54,739 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:20:54,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:20:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:20:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 15:20:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 15:20:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 15:20:54,746 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 189 [2018-07-23 15:20:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:54,746 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 15:20:54,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-23 15:20:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 15:20:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 15:20:54,746 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:54,746 INFO L353 BasicCegarLoop]: trace histogram [187, 1, 1, 1] [2018-07-23 15:20:54,747 INFO L414 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash 499517896, now seen corresponding path program 187 times [2018-07-23 15:20:54,747 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:55,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:55,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:20:55,798 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:20:55,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:20:55,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:20:55,805 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 190 states. [2018-07-23 15:20:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:56,219 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-07-23 15:20:56,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:20:56,219 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 190 [2018-07-23 15:20:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:56,220 INFO L225 Difference]: With dead ends: 194 [2018-07-23 15:20:56,220 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 15:20:56,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:20:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 15:20:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-23 15:20:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 15:20:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-07-23 15:20:56,225 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 190 [2018-07-23 15:20:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:56,226 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-07-23 15:20:56,226 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:20:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-07-23 15:20:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 15:20:56,226 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:56,226 INFO L353 BasicCegarLoop]: trace histogram [188, 1, 1, 1] [2018-07-23 15:20:56,226 INFO L414 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:56,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1694816383, now seen corresponding path program 188 times [2018-07-23 15:20:56,226 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:57,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:57,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-23 15:20:57,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-23 15:20:57,253 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-23 15:20:57,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:20:57,256 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 191 states. [2018-07-23 15:20:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:58,214 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-23 15:20:58,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-23 15:20:58,214 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 191 [2018-07-23 15:20:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:58,215 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:20:58,215 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:20:58,219 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:20:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:20:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:20:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:20:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-07-23 15:20:58,223 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 191 [2018-07-23 15:20:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:58,223 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-07-23 15:20:58,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-23 15:20:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-07-23 15:20:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:20:58,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:58,224 INFO L353 BasicCegarLoop]: trace histogram [189, 1, 1, 1] [2018-07-23 15:20:58,224 INFO L414 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -999702296, now seen corresponding path program 189 times [2018-07-23 15:20:58,225 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:20:59,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:59,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:20:59,262 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:20:59,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:20:59,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:20:59,269 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 192 states. [2018-07-23 15:21:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:00,384 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-23 15:21:00,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:21:00,384 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 192 [2018-07-23 15:21:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:00,385 INFO L225 Difference]: With dead ends: 196 [2018-07-23 15:21:00,385 INFO L226 Difference]: Without dead ends: 194 [2018-07-23 15:21:00,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:21:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-07-23 15:21:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-07-23 15:21:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 15:21:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 15:21:00,393 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 192 [2018-07-23 15:21:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:00,393 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 15:21:00,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:21:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 15:21:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 15:21:00,394 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:00,394 INFO L353 BasicCegarLoop]: trace histogram [190, 1, 1, 1] [2018-07-23 15:21:00,394 INFO L414 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash -926002079, now seen corresponding path program 190 times [2018-07-23 15:21:00,394 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:01,337 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:01,337 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-23 15:21:01,338 INFO L450 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-23 15:21:01,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-23 15:21:01,342 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:21:01,343 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 193 states. [2018-07-23 15:21:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:01,819 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-23 15:21:01,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-23 15:21:01,819 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 193 [2018-07-23 15:21:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:01,819 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:21:01,819 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:21:01,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:21:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:21:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-23 15:21:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:21:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-07-23 15:21:01,826 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 193 [2018-07-23 15:21:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:01,826 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-07-23 15:21:01,826 INFO L472 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-23 15:21:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-07-23 15:21:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:21:01,827 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:01,827 INFO L353 BasicCegarLoop]: trace histogram [191, 1, 1, 1] [2018-07-23 15:21:01,827 INFO L414 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1358704648, now seen corresponding path program 191 times [2018-07-23 15:21:01,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:02,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:02,807 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:21:02,807 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:21:02,811 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:21:02,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:21:02,815 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 194 states. [2018-07-23 15:21:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:03,140 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-07-23 15:21:03,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:21:03,140 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 194 [2018-07-23 15:21:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:03,141 INFO L225 Difference]: With dead ends: 198 [2018-07-23 15:21:03,141 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 15:21:03,143 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:21:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 15:21:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-07-23 15:21:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:21:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-07-23 15:21:03,147 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 194 [2018-07-23 15:21:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:03,148 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-07-23 15:21:03,148 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:21:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-07-23 15:21:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:21:03,149 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:03,149 INFO L353 BasicCegarLoop]: trace histogram [192, 1, 1, 1] [2018-07-23 15:21:03,149 INFO L414 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -829830847, now seen corresponding path program 192 times [2018-07-23 15:21:03,150 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:04,186 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:04,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-23 15:21:04,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-23 15:21:04,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-23 15:21:04,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:21:04,193 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 195 states. [2018-07-23 15:21:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:04,791 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 15:21:04,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-23 15:21:04,791 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 195 [2018-07-23 15:21:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:04,792 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:21:04,792 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:21:04,798 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:21:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:21:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-23 15:21:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 15:21:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 15:21:04,803 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 195 [2018-07-23 15:21:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:04,803 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 15:21:04,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-23 15:21:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 15:21:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 15:21:04,804 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:04,804 INFO L353 BasicCegarLoop]: trace histogram [193, 1, 1, 1] [2018-07-23 15:21:04,804 INFO L414 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 45045544, now seen corresponding path program 193 times [2018-07-23 15:21:04,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:05,963 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:05,963 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:21:05,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:21:05,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:21:05,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:21:05,969 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 196 states. [2018-07-23 15:21:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:07,048 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2018-07-23 15:21:07,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:21:07,048 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 196 [2018-07-23 15:21:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:07,049 INFO L225 Difference]: With dead ends: 200 [2018-07-23 15:21:07,049 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 15:21:07,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:21:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 15:21:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-23 15:21:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 15:21:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-07-23 15:21:07,057 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 196 [2018-07-23 15:21:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:07,057 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-07-23 15:21:07,057 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:21:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-07-23 15:21:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 15:21:07,058 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:07,058 INFO L353 BasicCegarLoop]: trace histogram [194, 1, 1, 1] [2018-07-23 15:21:07,058 INFO L414 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1396409889, now seen corresponding path program 194 times [2018-07-23 15:21:07,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:08,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:08,288 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-23 15:21:08,288 INFO L450 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-23 15:21:08,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-23 15:21:08,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:21:08,292 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2018-07-23 15:21:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:09,253 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-23 15:21:09,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-23 15:21:09,253 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2018-07-23 15:21:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:09,254 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:21:09,254 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:21:09,256 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:21:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:21:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:21:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:21:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-07-23 15:21:09,258 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 197 [2018-07-23 15:21:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:09,258 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-07-23 15:21:09,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-23 15:21:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-07-23 15:21:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:21:09,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:09,259 INFO L353 BasicCegarLoop]: trace histogram [195, 1, 1, 1] [2018-07-23 15:21:09,259 INFO L414 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:09,259 INFO L82 PathProgramCache]: Analyzing trace with hash 339031624, now seen corresponding path program 195 times [2018-07-23 15:21:09,259 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:10,348 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:10,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:21:10,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:21:10,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:21:10,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:21:10,355 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 198 states. [2018-07-23 15:21:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:11,653 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-23 15:21:11,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:21:11,654 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 198 [2018-07-23 15:21:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:11,654 INFO L225 Difference]: With dead ends: 202 [2018-07-23 15:21:11,654 INFO L226 Difference]: Without dead ends: 200 [2018-07-23 15:21:11,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:21:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-23 15:21:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-07-23 15:21:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 15:21:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 15:21:11,661 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 198 [2018-07-23 15:21:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:11,661 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 15:21:11,661 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:21:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 15:21:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 15:21:11,662 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:11,662 INFO L353 BasicCegarLoop]: trace histogram [196, 1, 1, 1] [2018-07-23 15:21:11,662 INFO L414 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1920043777, now seen corresponding path program 196 times [2018-07-23 15:21:11,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:12,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:12,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-23 15:21:12,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-23 15:21:12,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-23 15:21:12,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:21:12,787 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 199 states. [2018-07-23 15:21:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:13,992 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-23 15:21:13,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-23 15:21:13,992 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 199 [2018-07-23 15:21:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:13,992 INFO L225 Difference]: With dead ends: 203 [2018-07-23 15:21:13,992 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:21:13,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:21:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:21:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-23 15:21:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:21:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-07-23 15:21:13,998 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 199 [2018-07-23 15:21:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:13,999 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-07-23 15:21:13,999 INFO L472 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-23 15:21:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-07-23 15:21:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:21:13,999 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:13,999 INFO L353 BasicCegarLoop]: trace histogram [197, 1, 1, 1] [2018-07-23 15:21:13,999 INFO L414 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash -608187032, now seen corresponding path program 197 times [2018-07-23 15:21:14,000 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:15,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:15,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:21:15,095 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:21:15,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:21:15,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:21:15,100 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 200 states. [2018-07-23 15:21:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:16,179 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-07-23 15:21:16,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:21:16,179 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 200 [2018-07-23 15:21:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:16,180 INFO L225 Difference]: With dead ends: 204 [2018-07-23 15:21:16,180 INFO L226 Difference]: Without dead ends: 202 [2018-07-23 15:21:16,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:21:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-23 15:21:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-07-23 15:21:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 15:21:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-07-23 15:21:16,186 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 200 [2018-07-23 15:21:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:16,186 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-07-23 15:21:16,186 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:21:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-07-23 15:21:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 15:21:16,187 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:16,187 INFO L353 BasicCegarLoop]: trace histogram [198, 1, 1, 1] [2018-07-23 15:21:16,187 INFO L414 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1673930783, now seen corresponding path program 198 times [2018-07-23 15:21:16,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:17,321 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:17,321 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-23 15:21:17,321 INFO L450 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-23 15:21:17,325 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-23 15:21:17,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:21:17,328 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 201 states. [2018-07-23 15:21:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:18,343 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 15:21:18,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-07-23 15:21:18,343 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 201 [2018-07-23 15:21:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:18,344 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:21:18,344 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:21:18,347 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:21:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:21:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 15:21:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 15:21:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 15:21:18,349 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 201 [2018-07-23 15:21:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:18,350 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 15:21:18,350 INFO L472 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-07-23 15:21:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 15:21:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 15:21:18,350 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:18,350 INFO L353 BasicCegarLoop]: trace histogram [199, 1, 1, 1] [2018-07-23 15:21:18,350 INFO L414 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -352248696, now seen corresponding path program 199 times [2018-07-23 15:21:18,351 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:19,513 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:19,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:21:19,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:21:19,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:21:19,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:21:19,517 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 202 states. [2018-07-23 15:21:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:20,185 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-07-23 15:21:20,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:21:20,185 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 202 [2018-07-23 15:21:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:20,185 INFO L225 Difference]: With dead ends: 206 [2018-07-23 15:21:20,185 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 15:21:20,187 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:21:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 15:21:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-07-23 15:21:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 15:21:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-07-23 15:21:20,189 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 202 [2018-07-23 15:21:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:20,189 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-07-23 15:21:20,189 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:21:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-07-23 15:21:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 15:21:20,190 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:20,190 INFO L353 BasicCegarLoop]: trace histogram [200, 1, 1, 1] [2018-07-23 15:21:20,190 INFO L414 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1965190337, now seen corresponding path program 200 times [2018-07-23 15:21:20,190 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:21,292 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:21,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2018-07-23 15:21:21,293 INFO L450 AbstractCegarLoop]: Interpolant automaton has 203 states [2018-07-23 15:21:21,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2018-07-23 15:21:21,299 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:21:21,299 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 203 states. [2018-07-23 15:21:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:22,247 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-07-23 15:21:22,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2018-07-23 15:21:22,247 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 203 [2018-07-23 15:21:22,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:22,247 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:21:22,247 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:21:22,253 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:21:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:21:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:21:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:21:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-07-23 15:21:22,256 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 203 [2018-07-23 15:21:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:22,256 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-07-23 15:21:22,256 INFO L472 AbstractCegarLoop]: Interpolant automaton has 203 states. [2018-07-23 15:21:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-07-23 15:21:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:21:22,256 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:22,257 INFO L353 BasicCegarLoop]: trace histogram [201, 1, 1, 1] [2018-07-23 15:21:22,257 INFO L414 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash 791356328, now seen corresponding path program 201 times [2018-07-23 15:21:22,257 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:23,475 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:23,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:21:23,476 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:21:23,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:21:23,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:21:23,483 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 204 states. [2018-07-23 15:21:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:24,500 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-07-23 15:21:24,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:21:24,500 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 204 [2018-07-23 15:21:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:24,500 INFO L225 Difference]: With dead ends: 208 [2018-07-23 15:21:24,500 INFO L226 Difference]: Without dead ends: 206 [2018-07-23 15:21:24,504 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:21:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-07-23 15:21:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-07-23 15:21:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 15:21:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 15:21:24,507 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 204 [2018-07-23 15:21:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:24,507 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 15:21:24,507 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:21:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 15:21:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 15:21:24,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:24,508 INFO L353 BasicCegarLoop]: trace histogram [202, 1, 1, 1] [2018-07-23 15:21:24,508 INFO L414 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1237759583, now seen corresponding path program 202 times [2018-07-23 15:21:24,508 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20503 backedges. 0 proven. 20503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:25,697 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:25,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [204] total 204 [2018-07-23 15:21:25,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-07-23 15:21:25,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-07-23 15:21:25,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:21:25,704 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 205 states. [2018-07-23 15:21:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:26,558 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-07-23 15:21:26,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2018-07-23 15:21:26,558 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 205 [2018-07-23 15:21:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:26,559 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:21:26,559 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:21:26,562 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:21:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:21:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-07-23 15:21:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:21:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-07-23 15:21:26,565 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 205 [2018-07-23 15:21:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:26,565 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-07-23 15:21:26,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-07-23 15:21:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-07-23 15:21:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:21:26,566 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:26,566 INFO L353 BasicCegarLoop]: trace histogram [203, 1, 1, 1] [2018-07-23 15:21:26,566 INFO L414 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 284156616, now seen corresponding path program 203 times [2018-07-23 15:21:26,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:27,718 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:27,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:21:27,718 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:21:27,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:21:27,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:21:27,725 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 206 states. [2018-07-23 15:21:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:28,772 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2018-07-23 15:21:28,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:21:28,773 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 206 [2018-07-23 15:21:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:28,773 INFO L225 Difference]: With dead ends: 210 [2018-07-23 15:21:28,773 INFO L226 Difference]: Without dead ends: 208 [2018-07-23 15:21:28,777 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:21:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-07-23 15:21:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-07-23 15:21:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:21:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-07-23 15:21:28,780 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 206 [2018-07-23 15:21:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,780 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-07-23 15:21:28,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:21:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-07-23 15:21:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:21:28,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,781 INFO L353 BasicCegarLoop]: trace histogram [204, 1, 1, 1] [2018-07-23 15:21:28,781 INFO L414 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 218918529, now seen corresponding path program 204 times [2018-07-23 15:21:28,781 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20910 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:30,007 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:30,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [206] total 206 [2018-07-23 15:21:30,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 207 states [2018-07-23 15:21:30,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2018-07-23 15:21:30,010 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:21:30,010 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 207 states. [2018-07-23 15:21:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:31,185 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 15:21:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-07-23 15:21:31,186 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 207 [2018-07-23 15:21:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:31,186 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:21:31,186 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:21:31,188 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:21:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:21:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-07-23 15:21:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 15:21:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 15:21:31,190 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 207 [2018-07-23 15:21:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,190 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 15:21:31,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 207 states. [2018-07-23 15:21:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 15:21:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 15:21:31,191 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,191 INFO L353 BasicCegarLoop]: trace histogram [205, 1, 1, 1] [2018-07-23 15:21:31,191 INFO L414 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1803462168, now seen corresponding path program 205 times [2018-07-23 15:21:31,191 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:32,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,359 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:21:32,360 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:21:32,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:21:32,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:21:32,366 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 208 states. [2018-07-23 15:21:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:33,764 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-07-23 15:21:33,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:21:33,764 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 208 [2018-07-23 15:21:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:33,765 INFO L225 Difference]: With dead ends: 212 [2018-07-23 15:21:33,765 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 15:21:33,768 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:21:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 15:21:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-07-23 15:21:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 15:21:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-07-23 15:21:33,771 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 208 [2018-07-23 15:21:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:33,771 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-07-23 15:21:33,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:21:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-07-23 15:21:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 15:21:33,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:33,772 INFO L353 BasicCegarLoop]: trace histogram [206, 1, 1, 1] [2018-07-23 15:21:33,772 INFO L414 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash -72754335, now seen corresponding path program 206 times [2018-07-23 15:21:33,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21321 backedges. 0 proven. 21321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:34,977 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:34,977 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [208] total 208 [2018-07-23 15:21:34,977 INFO L450 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-07-23 15:21:34,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-07-23 15:21:34,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:21:34,984 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 209 states. [2018-07-23 15:21:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:36,503 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-07-23 15:21:36,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2018-07-23 15:21:36,503 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 209 [2018-07-23 15:21:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:36,504 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:21:36,504 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:21:36,508 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:21:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:21:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:21:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:21:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-07-23 15:21:36,511 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 209 [2018-07-23 15:21:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:36,511 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-07-23 15:21:36,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-07-23 15:21:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-07-23 15:21:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:21:36,511 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:36,512 INFO L353 BasicCegarLoop]: trace histogram [207, 1, 1, 1] [2018-07-23 15:21:36,512 INFO L414 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2039580936, now seen corresponding path program 207 times [2018-07-23 15:21:36,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:37,709 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:37,709 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:21:37,709 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:21:37,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:21:37,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:21:37,716 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 210 states. [2018-07-23 15:21:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:38,986 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-07-23 15:21:38,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:21:38,986 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 210 [2018-07-23 15:21:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:38,987 INFO L225 Difference]: With dead ends: 214 [2018-07-23 15:21:38,987 INFO L226 Difference]: Without dead ends: 212 [2018-07-23 15:21:38,992 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:21:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-07-23 15:21:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-07-23 15:21:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 15:21:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 15:21:38,996 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 210 [2018-07-23 15:21:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:38,996 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 15:21:38,996 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:21:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 15:21:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 15:21:38,997 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:38,997 INFO L353 BasicCegarLoop]: trace histogram [208, 1, 1, 1] [2018-07-23 15:21:38,997 INFO L414 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1197502399, now seen corresponding path program 208 times [2018-07-23 15:21:38,998 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21736 backedges. 0 proven. 21736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:40,579 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:40,579 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [210] total 210 [2018-07-23 15:21:40,579 INFO L450 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-07-23 15:21:40,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-07-23 15:21:40,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:21:40,587 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 211 states. [2018-07-23 15:21:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:41,290 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-07-23 15:21:41,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2018-07-23 15:21:41,290 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 211 [2018-07-23 15:21:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:41,290 INFO L225 Difference]: With dead ends: 215 [2018-07-23 15:21:41,291 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:21:41,294 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:21:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:21:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-07-23 15:21:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:21:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-07-23 15:21:41,297 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 211 [2018-07-23 15:21:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:41,297 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-07-23 15:21:41,297 INFO L472 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-07-23 15:21:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-07-23 15:21:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:21:41,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:41,298 INFO L353 BasicCegarLoop]: trace histogram [209, 1, 1, 1] [2018-07-23 15:21:41,298 INFO L414 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1532129320, now seen corresponding path program 209 times [2018-07-23 15:21:41,298 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:42,448 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:42,448 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:21:42,449 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:21:42,451 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:21:42,453 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:21:42,453 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 212 states. [2018-07-23 15:21:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:43,121 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2018-07-23 15:21:43,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:21:43,121 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 212 [2018-07-23 15:21:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:43,121 INFO L225 Difference]: With dead ends: 216 [2018-07-23 15:21:43,122 INFO L226 Difference]: Without dead ends: 214 [2018-07-23 15:21:43,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:21:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-07-23 15:21:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-07-23 15:21:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 15:21:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-07-23 15:21:43,126 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 212 [2018-07-23 15:21:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:43,127 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-07-23 15:21:43,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:21:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-07-23 15:21:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 15:21:43,127 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:43,127 INFO L353 BasicCegarLoop]: trace histogram [210, 1, 1, 1] [2018-07-23 15:21:43,127 INFO L414 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash 251366689, now seen corresponding path program 210 times [2018-07-23 15:21:43,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22155 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:44,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:44,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [212] total 212 [2018-07-23 15:21:44,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-07-23 15:21:44,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-07-23 15:21:44,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:21:44,389 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 213 states. [2018-07-23 15:21:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:45,634 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 15:21:45,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-07-23 15:21:45,635 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 213 [2018-07-23 15:21:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:45,635 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:21:45,635 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:21:45,640 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:21:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:21:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-07-23 15:21:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 15:21:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 15:21:45,643 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 213 [2018-07-23 15:21:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:45,643 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 15:21:45,643 INFO L472 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-07-23 15:21:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 15:21:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 15:21:45,644 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:45,644 INFO L353 BasicCegarLoop]: trace histogram [211, 1, 1, 1] [2018-07-23 15:21:45,644 INFO L414 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -797569208, now seen corresponding path program 211 times [2018-07-23 15:21:45,644 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:46,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:46,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:21:46,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:21:46,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:21:46,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:21:46,993 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 214 states. [2018-07-23 15:21:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:48,744 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-07-23 15:21:48,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:21:48,744 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 214 [2018-07-23 15:21:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:48,745 INFO L225 Difference]: With dead ends: 218 [2018-07-23 15:21:48,745 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 15:21:48,746 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:21:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 15:21:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-07-23 15:21:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 15:21:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-07-23 15:21:48,749 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 214 [2018-07-23 15:21:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:48,749 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-07-23 15:21:48,749 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:21:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-07-23 15:21:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 15:21:48,750 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:48,750 INFO L353 BasicCegarLoop]: trace histogram [212, 1, 1, 1] [2018-07-23 15:21:48,750 INFO L414 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1045156353, now seen corresponding path program 212 times [2018-07-23 15:21:48,751 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22578 backedges. 0 proven. 22578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:50,045 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:50,045 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [214] total 214 [2018-07-23 15:21:50,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 215 states [2018-07-23 15:21:50,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2018-07-23 15:21:50,052 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:21:50,052 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 215 states. [2018-07-23 15:21:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:51,190 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-07-23 15:21:51,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-07-23 15:21:51,190 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 215 [2018-07-23 15:21:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:51,191 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:21:51,191 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:21:51,196 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:21:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:21:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:21:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:21:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-07-23 15:21:51,198 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 215 [2018-07-23 15:21:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:51,199 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-07-23 15:21:51,199 INFO L472 AbstractCegarLoop]: Interpolant automaton has 215 states. [2018-07-23 15:21:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-07-23 15:21:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:21:51,200 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:51,200 INFO L353 BasicCegarLoop]: trace histogram [213, 1, 1, 1] [2018-07-23 15:21:51,200 INFO L414 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1959893400, now seen corresponding path program 213 times [2018-07-23 15:21:51,200 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:52,492 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:52,492 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:21:52,493 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:21:52,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:21:52,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:21:52,500 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 216 states. [2018-07-23 15:21:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:52,985 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-07-23 15:21:52,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:21:52,985 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 216 [2018-07-23 15:21:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:52,985 INFO L225 Difference]: With dead ends: 220 [2018-07-23 15:21:52,986 INFO L226 Difference]: Without dead ends: 218 [2018-07-23 15:21:52,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:21:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-07-23 15:21:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-07-23 15:21:52,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 15:21:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 15:21:52,992 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 216 [2018-07-23 15:21:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:52,992 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 15:21:52,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:21:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 15:21:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 15:21:52,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:52,993 INFO L353 BasicCegarLoop]: trace histogram [214, 1, 1, 1] [2018-07-23 15:21:52,993 INFO L414 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -627155231, now seen corresponding path program 214 times [2018-07-23 15:21:52,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23005 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:54,267 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,267 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [216] total 216 [2018-07-23 15:21:54,267 INFO L450 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-07-23 15:21:54,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-07-23 15:21:54,274 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:21:54,274 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 217 states. [2018-07-23 15:21:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,150 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-07-23 15:21:55,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2018-07-23 15:21:55,150 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 217 [2018-07-23 15:21:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,151 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:21:55,151 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:21:55,155 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:21:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:21:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-07-23 15:21:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:21:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-07-23 15:21:55,158 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 217 [2018-07-23 15:21:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:55,158 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-07-23 15:21:55,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-07-23 15:21:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-07-23 15:21:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:21:55,159 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:55,159 INFO L353 BasicCegarLoop]: trace histogram [215, 1, 1, 1] [2018-07-23 15:21:55,159 INFO L414 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2033022344, now seen corresponding path program 215 times [2018-07-23 15:21:55,159 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:56,368 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:56,368 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:21:56,369 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:21:56,372 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:21:56,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:21:56,376 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 218 states. [2018-07-23 15:21:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:58,269 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-07-23 15:21:58,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:21:58,270 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 218 [2018-07-23 15:21:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:58,270 INFO L225 Difference]: With dead ends: 222 [2018-07-23 15:21:58,270 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 15:21:58,275 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:21:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 15:21:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-07-23 15:21:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:21:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-07-23 15:21:58,278 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 218 [2018-07-23 15:21:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:58,278 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-07-23 15:21:58,278 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:21:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-07-23 15:21:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:21:58,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:58,279 INFO L353 BasicCegarLoop]: trace histogram [216, 1, 1, 1] [2018-07-23 15:21:58,279 INFO L414 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1400818751, now seen corresponding path program 216 times [2018-07-23 15:21:58,279 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23436 backedges. 0 proven. 23436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:21:59,616 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:59,616 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [218] total 218 [2018-07-23 15:21:59,616 INFO L450 AbstractCegarLoop]: Interpolant automaton has 219 states [2018-07-23 15:21:59,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2018-07-23 15:21:59,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:21:59,625 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 219 states. [2018-07-23 15:22:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:00,698 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 15:22:00,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-07-23 15:22:00,698 INFO L78 Accepts]: Start accepts. Automaton has 219 states. Word has length 219 [2018-07-23 15:22:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:00,699 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:22:00,699 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:22:00,704 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:22:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:22:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-07-23 15:22:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 15:22:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 15:22:00,708 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 219 [2018-07-23 15:22:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:00,708 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 15:22:00,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 219 states. [2018-07-23 15:22:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 15:22:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 15:22:00,709 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:00,709 INFO L353 BasicCegarLoop]: trace histogram [217, 1, 1, 1] [2018-07-23 15:22:00,710 INFO L414 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:00,710 INFO L82 PathProgramCache]: Analyzing trace with hash -475710296, now seen corresponding path program 217 times [2018-07-23 15:22:00,710 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23653 backedges. 0 proven. 23653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:02,010 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:02,010 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:22:02,010 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:22:02,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:22:02,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:22:02,018 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 220 states. [2018-07-23 15:22:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:02,910 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2018-07-23 15:22:02,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:22:02,911 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 220 [2018-07-23 15:22:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:02,911 INFO L225 Difference]: With dead ends: 224 [2018-07-23 15:22:02,911 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 15:22:02,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:22:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 15:22:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-07-23 15:22:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 15:22:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-07-23 15:22:02,918 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 220 [2018-07-23 15:22:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:02,918 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-07-23 15:22:02,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:22:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-07-23 15:22:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 15:22:02,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:02,919 INFO L353 BasicCegarLoop]: trace histogram [218, 1, 1, 1] [2018-07-23 15:22:02,919 INFO L414 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1862119263, now seen corresponding path program 218 times [2018-07-23 15:22:02,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 23871 backedges. 0 proven. 23871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:04,229 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:04,229 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [220] total 220 [2018-07-23 15:22:04,229 INFO L450 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-07-23 15:22:04,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-07-23 15:22:04,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:22:04,236 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 221 states. [2018-07-23 15:22:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:05,765 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-07-23 15:22:05,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:22:05,765 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 221 [2018-07-23 15:22:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:05,765 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:22:05,765 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:22:05,768 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:22:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:22:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:22:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:22:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-07-23 15:22:05,771 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 221 [2018-07-23 15:22:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:05,771 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-07-23 15:22:05,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-07-23 15:22:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-07-23 15:22:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:22:05,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:05,772 INFO L353 BasicCegarLoop]: trace histogram [219, 1, 1, 1] [2018-07-23 15:22:05,772 INFO L414 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1891124280, now seen corresponding path program 219 times [2018-07-23 15:22:05,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24090 backedges. 0 proven. 24090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:07,076 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:07,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:22:07,077 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:22:07,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:22:07,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:22:07,085 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 222 states. [2018-07-23 15:22:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:07,705 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-07-23 15:22:07,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:22:07,705 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 222 [2018-07-23 15:22:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:07,705 INFO L225 Difference]: With dead ends: 226 [2018-07-23 15:22:07,705 INFO L226 Difference]: Without dead ends: 224 [2018-07-23 15:22:07,710 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:22:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-07-23 15:22:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-07-23 15:22:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 15:22:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 15:22:07,713 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 222 [2018-07-23 15:22:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:07,714 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 15:22:07,714 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:22:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 15:22:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 15:22:07,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:07,715 INFO L353 BasicCegarLoop]: trace histogram [220, 1, 1, 1] [2018-07-23 15:22:07,715 INFO L414 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1504687489, now seen corresponding path program 220 times [2018-07-23 15:22:07,715 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24310 backedges. 0 proven. 24310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:09,236 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:09,236 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [222] total 222 [2018-07-23 15:22:09,236 INFO L450 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-07-23 15:22:09,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-07-23 15:22:09,242 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:22:09,242 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 223 states. [2018-07-23 15:22:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:10,318 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-07-23 15:22:10,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-07-23 15:22:10,319 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 223 [2018-07-23 15:22:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:10,319 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:22:10,319 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:22:10,323 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:22:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:22:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-07-23 15:22:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:22:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-07-23 15:22:10,325 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 223 [2018-07-23 15:22:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:10,325 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-07-23 15:22:10,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-07-23 15:22:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-07-23 15:22:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:22:10,326 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:10,326 INFO L353 BasicCegarLoop]: trace histogram [221, 1, 1, 1] [2018-07-23 15:22:10,326 INFO L414 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash -599330072, now seen corresponding path program 221 times [2018-07-23 15:22:10,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24531 backedges. 0 proven. 24531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:11,741 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:11,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:22:11,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:22:11,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:22:11,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:22:11,750 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 224 states. [2018-07-23 15:22:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:13,883 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-07-23 15:22:13,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:22:13,883 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 224 [2018-07-23 15:22:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:13,883 INFO L225 Difference]: With dead ends: 228 [2018-07-23 15:22:13,883 INFO L226 Difference]: Without dead ends: 226 [2018-07-23 15:22:13,888 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:22:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-23 15:22:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-07-23 15:22:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 15:22:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-07-23 15:22:13,891 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 224 [2018-07-23 15:22:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:13,891 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-07-23 15:22:13,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:22:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-07-23 15:22:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 15:22:13,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:13,892 INFO L353 BasicCegarLoop]: trace histogram [222, 1, 1, 1] [2018-07-23 15:22:13,892 INFO L414 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1399365023, now seen corresponding path program 222 times [2018-07-23 15:22:13,892 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24753 backedges. 0 proven. 24753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:15,347 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:15,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [224] total 224 [2018-07-23 15:22:15,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-07-23 15:22:15,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-07-23 15:22:15,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:22:15,353 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 225 states. [2018-07-23 15:22:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:16,364 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 15:22:16,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2018-07-23 15:22:16,365 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 225 [2018-07-23 15:22:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:16,365 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:22:16,365 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:22:16,368 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:22:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:22:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-07-23 15:22:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 15:22:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 15:22:16,371 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 225 [2018-07-23 15:22:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:16,371 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 15:22:16,371 INFO L472 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-07-23 15:22:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 15:22:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 15:22:16,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:16,372 INFO L353 BasicCegarLoop]: trace histogram [223, 1, 1, 1] [2018-07-23 15:22:16,372 INFO L414 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -430644728, now seen corresponding path program 223 times [2018-07-23 15:22:16,372 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24976 backedges. 0 proven. 24976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:17,698 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:17,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [225] total 225 [2018-07-23 15:22:17,699 INFO L450 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-07-23 15:22:17,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-07-23 15:22:17,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:22:17,707 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 226 states. [2018-07-23 15:22:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:19,742 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-07-23 15:22:19,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:22:19,742 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 226 [2018-07-23 15:22:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:19,742 INFO L225 Difference]: With dead ends: 230 [2018-07-23 15:22:19,742 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 15:22:19,747 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:22:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 15:22:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-07-23 15:22:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 15:22:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-07-23 15:22:19,749 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 226 [2018-07-23 15:22:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:19,749 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-07-23 15:22:19,749 INFO L472 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-07-23 15:22:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-07-23 15:22:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 15:22:19,750 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:19,750 INFO L353 BasicCegarLoop]: trace histogram [224, 1, 1, 1] [2018-07-23 15:22:19,750 INFO L414 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -465086655, now seen corresponding path program 224 times [2018-07-23 15:22:19,750 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25200 backedges. 0 proven. 25200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:21,119 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:21,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [226] total 226 [2018-07-23 15:22:21,120 INFO L450 AbstractCegarLoop]: Interpolant automaton has 227 states [2018-07-23 15:22:21,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2018-07-23 15:22:21,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:22:21,125 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 227 states. [2018-07-23 15:22:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:21,594 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-07-23 15:22:21,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2018-07-23 15:22:21,594 INFO L78 Accepts]: Start accepts. Automaton has 227 states. Word has length 227 [2018-07-23 15:22:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:21,594 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:22:21,595 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:22:21,597 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:22:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:22:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:22:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:22:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-07-23 15:22:21,600 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 227 [2018-07-23 15:22:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:21,600 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-07-23 15:22:21,600 INFO L472 AbstractCegarLoop]: Interpolant automaton has 227 states. [2018-07-23 15:22:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-07-23 15:22:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:22:21,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:21,601 INFO L353 BasicCegarLoop]: trace histogram [225, 1, 1, 1] [2018-07-23 15:22:21,601 INFO L414 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1532786392, now seen corresponding path program 225 times [2018-07-23 15:22:21,601 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25425 backedges. 0 proven. 25425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:22,891 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:22,891 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [227] total 227 [2018-07-23 15:22:22,891 INFO L450 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-07-23 15:22:22,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-07-23 15:22:22,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:22:22,899 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 228 states. [2018-07-23 15:22:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:24,588 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-07-23 15:22:24,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-07-23 15:22:24,588 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 228 [2018-07-23 15:22:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:24,588 INFO L225 Difference]: With dead ends: 232 [2018-07-23 15:22:24,588 INFO L226 Difference]: Without dead ends: 230 [2018-07-23 15:22:24,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:22:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-07-23 15:22:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-07-23 15:22:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 15:22:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 15:22:24,596 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 228 [2018-07-23 15:22:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:24,596 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 15:22:24,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-07-23 15:22:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 15:22:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 15:22:24,597 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:24,597 INFO L353 BasicCegarLoop]: trace histogram [226, 1, 1, 1] [2018-07-23 15:22:24,597 INFO L414 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash -271739871, now seen corresponding path program 226 times [2018-07-23 15:22:24,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25651 backedges. 0 proven. 25651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:26,100 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:26,100 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [228] total 228 [2018-07-23 15:22:26,100 INFO L450 AbstractCegarLoop]: Interpolant automaton has 229 states [2018-07-23 15:22:26,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2018-07-23 15:22:26,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:22:26,107 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 229 states. [2018-07-23 15:22:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:27,462 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-07-23 15:22:27,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2018-07-23 15:22:27,462 INFO L78 Accepts]: Start accepts. Automaton has 229 states. Word has length 229 [2018-07-23 15:22:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:27,463 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:22:27,463 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:22:27,466 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:22:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:22:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-07-23 15:22:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:22:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-07-23 15:22:27,469 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 229 [2018-07-23 15:22:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:27,469 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-07-23 15:22:27,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 229 states. [2018-07-23 15:22:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-07-23 15:22:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:22:27,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:27,470 INFO L353 BasicCegarLoop]: trace histogram [227, 1, 1, 1] [2018-07-23 15:22:27,470 INFO L414 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 165996616, now seen corresponding path program 227 times [2018-07-23 15:22:27,470 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25878 backedges. 0 proven. 25878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:28,959 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:28,959 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [229] total 229 [2018-07-23 15:22:28,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-07-23 15:22:28,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-07-23 15:22:28,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26335, Invalid=26335, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:22:28,970 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 230 states. [2018-07-23 15:22:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:30,797 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2018-07-23 15:22:30,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2018-07-23 15:22:30,797 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 230 [2018-07-23 15:22:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:30,797 INFO L225 Difference]: With dead ends: 234 [2018-07-23 15:22:30,797 INFO L226 Difference]: Without dead ends: 232 [2018-07-23 15:22:30,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26335, Invalid=26335, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:22:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-07-23 15:22:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-07-23 15:22:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 15:22:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-07-23 15:22:30,806 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 230 [2018-07-23 15:22:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:30,806 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-07-23 15:22:30,806 INFO L472 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-07-23 15:22:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-07-23 15:22:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 15:22:30,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:30,807 INFO L353 BasicCegarLoop]: trace histogram [228, 1, 1, 1] [2018-07-23 15:22:30,807 INFO L414 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash 850925825, now seen corresponding path program 228 times [2018-07-23 15:22:30,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 26106 backedges. 0 proven. 26106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:32,134 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:32,134 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [230] total 230 [2018-07-23 15:22:32,134 INFO L450 AbstractCegarLoop]: Interpolant automaton has 231 states [2018-07-23 15:22:32,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2018-07-23 15:22:32,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26565, Invalid=26565, Unknown=0, NotChecked=0, Total=53130 [2018-07-23 15:22:32,139 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 231 states. [2018-07-23 15:22:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:32,614 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 15:22:32,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2018-07-23 15:22:32,614 INFO L78 Accepts]: Start accepts. Automaton has 231 states. Word has length 231 [2018-07-23 15:22:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:32,615 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:22:32,615 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 15:22:32,619 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26565, Invalid=26565, Unknown=0, NotChecked=0, Total=53130 [2018-07-23 15:22:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 15:22:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-07-23 15:22:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 15:22:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 15:22:32,622 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 231 [2018-07-23 15:22:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:32,622 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 15:22:32,622 INFO L472 AbstractCegarLoop]: Interpolant automaton has 231 states. [2018-07-23 15:22:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 15:22:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 15:22:32,623 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:32,623 INFO L353 BasicCegarLoop]: trace histogram [229, 1, 1, 1] [2018-07-23 15:22:32,623 INFO L414 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 608894824, now seen corresponding path program 229 times [2018-07-23 15:22:32,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26335 backedges. 0 proven. 26335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:33,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:33,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [231] total 231 [2018-07-23 15:22:33,988 INFO L450 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-07-23 15:22:33,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-07-23 15:22:33,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26796, Invalid=26796, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:22:33,999 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 232 states. [2018-07-23 15:22:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:35,930 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2018-07-23 15:22:35,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2018-07-23 15:22:35,930 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 232 [2018-07-23 15:22:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:35,931 INFO L225 Difference]: With dead ends: 236 [2018-07-23 15:22:35,931 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 15:22:35,936 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26796, Invalid=26796, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:22:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 15:22:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-07-23 15:22:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-23 15:22:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-07-23 15:22:35,939 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 232 [2018-07-23 15:22:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:35,939 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-07-23 15:22:35,939 INFO L472 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-07-23 15:22:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-07-23 15:22:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-23 15:22:35,940 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:35,940 INFO L353 BasicCegarLoop]: trace histogram [230, 1, 1, 1] [2018-07-23 15:22:35,940 INFO L414 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1695868385, now seen corresponding path program 230 times [2018-07-23 15:22:35,940 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26565 backedges. 0 proven. 26565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:37,461 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:37,462 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [232] total 232 [2018-07-23 15:22:37,462 INFO L450 AbstractCegarLoop]: Interpolant automaton has 233 states [2018-07-23 15:22:37,465 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2018-07-23 15:22:37,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27028, Invalid=27028, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:22:37,468 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 233 states. [2018-07-23 15:22:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:38,675 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-07-23 15:22:38,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2018-07-23 15:22:38,675 INFO L78 Accepts]: Start accepts. Automaton has 233 states. Word has length 233 [2018-07-23 15:22:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:38,676 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:22:38,676 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:22:38,680 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27028, Invalid=27028, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:22:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:22:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:22:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:22:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-07-23 15:22:38,683 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 233 [2018-07-23 15:22:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:38,683 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-07-23 15:22:38,683 INFO L472 AbstractCegarLoop]: Interpolant automaton has 233 states. [2018-07-23 15:22:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-07-23 15:22:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:22:38,684 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:38,684 INFO L353 BasicCegarLoop]: trace histogram [231, 1, 1, 1] [2018-07-23 15:22:38,684 INFO L414 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1032310408, now seen corresponding path program 231 times [2018-07-23 15:22:38,685 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 26796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:40,167 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:40,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [233] total 233 [2018-07-23 15:22:40,167 INFO L450 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-07-23 15:22:40,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-07-23 15:22:40,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27261, Invalid=27261, Unknown=0, NotChecked=0, Total=54522 [2018-07-23 15:22:40,177 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 234 states. [2018-07-23 15:22:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:41,460 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-07-23 15:22:41,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2018-07-23 15:22:41,460 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 234 [2018-07-23 15:22:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:41,461 INFO L225 Difference]: With dead ends: 238 [2018-07-23 15:22:41,461 INFO L226 Difference]: Without dead ends: 236 [2018-07-23 15:22:41,467 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27261, Invalid=27261, Unknown=0, NotChecked=0, Total=54522 [2018-07-23 15:22:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-07-23 15:22:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-07-23 15:22:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 15:22:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-07-23 15:22:41,470 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 234 [2018-07-23 15:22:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:41,470 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-07-23 15:22:41,470 INFO L472 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-07-23 15:22:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-07-23 15:22:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 15:22:41,471 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:41,471 INFO L353 BasicCegarLoop]: trace histogram [232, 1, 1, 1] [2018-07-23 15:22:41,471 INFO L414 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1936849601, now seen corresponding path program 232 times [2018-07-23 15:22:41,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27028 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:42,906 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:42,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [234] total 234 [2018-07-23 15:22:42,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 235 states [2018-07-23 15:22:42,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2018-07-23 15:22:42,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27495, Invalid=27495, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:22:42,914 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 235 states. [2018-07-23 15:22:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:44,454 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-07-23 15:22:44,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2018-07-23 15:22:44,454 INFO L78 Accepts]: Start accepts. Automaton has 235 states. Word has length 235 [2018-07-23 15:22:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:44,455 INFO L225 Difference]: With dead ends: 239 [2018-07-23 15:22:44,455 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 15:22:44,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27495, Invalid=27495, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:22:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 15:22:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-07-23 15:22:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:22:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-07-23 15:22:44,461 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 235 [2018-07-23 15:22:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:44,461 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-07-23 15:22:44,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 235 states. [2018-07-23 15:22:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-07-23 15:22:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:22:44,462 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:44,462 INFO L353 BasicCegarLoop]: trace histogram [233, 1, 1, 1] [2018-07-23 15:22:44,462 INFO L414 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -87206488, now seen corresponding path program 233 times [2018-07-23 15:22:44,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27261 backedges. 0 proven. 27261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:45,892 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:45,892 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [235] total 235 [2018-07-23 15:22:45,893 INFO L450 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-07-23 15:22:45,897 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-07-23 15:22:45,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27730, Invalid=27730, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:22:45,903 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 236 states. [2018-07-23 15:22:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:47,447 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2018-07-23 15:22:47,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2018-07-23 15:22:47,447 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 236 [2018-07-23 15:22:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:47,448 INFO L225 Difference]: With dead ends: 240 [2018-07-23 15:22:47,448 INFO L226 Difference]: Without dead ends: 238 [2018-07-23 15:22:47,453 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27730, Invalid=27730, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:22:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-07-23 15:22:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-07-23 15:22:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-23 15:22:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-07-23 15:22:47,455 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 236 [2018-07-23 15:22:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:47,456 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-07-23 15:22:47,456 INFO L472 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-07-23 15:22:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-07-23 15:22:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-23 15:22:47,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:47,456 INFO L353 BasicCegarLoop]: trace histogram [234, 1, 1, 1] [2018-07-23 15:22:47,456 INFO L414 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1591564193, now seen corresponding path program 234 times [2018-07-23 15:22:47,457 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27495 backedges. 0 proven. 27495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:48,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:48,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [236] total 236 [2018-07-23 15:22:48,920 INFO L450 AbstractCegarLoop]: Interpolant automaton has 237 states [2018-07-23 15:22:48,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 237 interpolants. [2018-07-23 15:22:48,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27966, Invalid=27966, Unknown=0, NotChecked=0, Total=55932 [2018-07-23 15:22:48,932 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 237 states. [2018-07-23 15:22:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:50,413 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 15:22:50,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2018-07-23 15:22:50,413 INFO L78 Accepts]: Start accepts. Automaton has 237 states. Word has length 237 [2018-07-23 15:22:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:50,413 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:22:50,414 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 15:22:50,418 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27966, Invalid=27966, Unknown=0, NotChecked=0, Total=55932 [2018-07-23 15:22:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 15:22:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-07-23 15:22:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 15:22:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 15:22:50,421 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 237 [2018-07-23 15:22:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:50,421 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 15:22:50,421 INFO L472 AbstractCegarLoop]: Interpolant automaton has 237 states. [2018-07-23 15:22:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 15:22:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 15:22:50,422 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:50,422 INFO L353 BasicCegarLoop]: trace histogram [235, 1, 1, 1] [2018-07-23 15:22:50,422 INFO L414 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2093847752, now seen corresponding path program 235 times [2018-07-23 15:22:50,422 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27730 backedges. 0 proven. 27730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:51,905 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:51,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [237] total 237 [2018-07-23 15:22:51,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-07-23 15:22:51,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-07-23 15:22:51,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28203, Invalid=28203, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:22:51,914 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 238 states. [2018-07-23 15:22:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:53,345 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-07-23 15:22:53,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2018-07-23 15:22:53,345 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 238 [2018-07-23 15:22:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:53,346 INFO L225 Difference]: With dead ends: 242 [2018-07-23 15:22:53,346 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 15:22:53,350 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28203, Invalid=28203, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:22:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 15:22:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-07-23 15:22:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-23 15:22:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-07-23 15:22:53,353 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 238 [2018-07-23 15:22:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:53,353 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-07-23 15:22:53,353 INFO L472 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-07-23 15:22:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-07-23 15:22:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-23 15:22:53,354 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:53,354 INFO L353 BasicCegarLoop]: trace histogram [236, 1, 1, 1] [2018-07-23 15:22:53,354 INFO L414 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash 484768897, now seen corresponding path program 236 times [2018-07-23 15:22:53,354 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27966 backedges. 0 proven. 27966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:54,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:54,880 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [238] total 238 [2018-07-23 15:22:54,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 239 states [2018-07-23 15:22:54,884 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2018-07-23 15:22:54,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28441, Invalid=28441, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:22:54,889 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 239 states. [2018-07-23 15:22:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:56,219 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-07-23 15:22:56,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2018-07-23 15:22:56,219 INFO L78 Accepts]: Start accepts. Automaton has 239 states. Word has length 239 [2018-07-23 15:22:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:56,219 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:22:56,220 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:22:56,225 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28441, Invalid=28441, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:22:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:22:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:22:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:22:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-07-23 15:22:56,228 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 239 [2018-07-23 15:22:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:56,228 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-07-23 15:22:56,228 INFO L472 AbstractCegarLoop]: Interpolant automaton has 239 states. [2018-07-23 15:22:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-07-23 15:22:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:22:56,229 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:56,229 INFO L353 BasicCegarLoop]: trace histogram [237, 1, 1, 1] [2018-07-23 15:22:56,229 INFO L414 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2142931944, now seen corresponding path program 237 times [2018-07-23 15:22:56,229 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 28203 backedges. 0 proven. 28203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:22:57,754 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:57,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [239] total 239 [2018-07-23 15:22:57,755 INFO L450 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-07-23 15:22:57,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-07-23 15:22:57,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28680, Invalid=28680, Unknown=0, NotChecked=0, Total=57360 [2018-07-23 15:22:57,758 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 240 states. [2018-07-23 15:22:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:58,736 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-07-23 15:22:58,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2018-07-23 15:22:58,736 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 240 [2018-07-23 15:22:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:58,736 INFO L225 Difference]: With dead ends: 244 [2018-07-23 15:22:58,736 INFO L226 Difference]: Without dead ends: 242 [2018-07-23 15:22:58,738 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28680, Invalid=28680, Unknown=0, NotChecked=0, Total=57360 [2018-07-23 15:22:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-07-23 15:22:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2018-07-23 15:22:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 15:22:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-07-23 15:22:58,741 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 240 [2018-07-23 15:22:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:58,741 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-07-23 15:22:58,741 INFO L472 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-07-23 15:22:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-07-23 15:22:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 15:22:58,742 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:58,742 INFO L353 BasicCegarLoop]: trace histogram [238, 1, 1, 1] [2018-07-23 15:22:58,742 INFO L414 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2006378849, now seen corresponding path program 238 times [2018-07-23 15:22:58,742 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 28441 backedges. 0 proven. 28441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:00,163 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:00,163 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [240] total 240 [2018-07-23 15:23:00,163 INFO L450 AbstractCegarLoop]: Interpolant automaton has 241 states [2018-07-23 15:23:00,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 241 interpolants. [2018-07-23 15:23:00,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28920, Invalid=28920, Unknown=0, NotChecked=0, Total=57840 [2018-07-23 15:23:00,171 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 241 states. [2018-07-23 15:23:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:02,299 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-07-23 15:23:02,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2018-07-23 15:23:02,299 INFO L78 Accepts]: Start accepts. Automaton has 241 states. Word has length 241 [2018-07-23 15:23:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:02,299 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:23:02,299 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:23:02,304 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28920, Invalid=28920, Unknown=0, NotChecked=0, Total=57840 [2018-07-23 15:23:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:23:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-07-23 15:23:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:23:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-07-23 15:23:02,307 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 241 [2018-07-23 15:23:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:02,307 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-07-23 15:23:02,307 INFO L472 AbstractCegarLoop]: Interpolant automaton has 241 states. [2018-07-23 15:23:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-07-23 15:23:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:23:02,308 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:02,308 INFO L353 BasicCegarLoop]: trace histogram [239, 1, 1, 1] [2018-07-23 15:23:02,308 INFO L414 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2068200200, now seen corresponding path program 239 times [2018-07-23 15:23:02,308 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28680 backedges. 0 proven. 28680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:03,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:03,794 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [241] total 241 [2018-07-23 15:23:03,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-07-23 15:23:03,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-07-23 15:23:03,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29161, Invalid=29161, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:23:03,800 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 242 states. [2018-07-23 15:23:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:05,324 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2018-07-23 15:23:05,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2018-07-23 15:23:05,324 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 242 [2018-07-23 15:23:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:05,325 INFO L225 Difference]: With dead ends: 246 [2018-07-23 15:23:05,325 INFO L226 Difference]: Without dead ends: 244 [2018-07-23 15:23:05,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=29161, Invalid=29161, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:23:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-07-23 15:23:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-07-23 15:23:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 15:23:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-07-23 15:23:05,331 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 242 [2018-07-23 15:23:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:05,331 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-07-23 15:23:05,332 INFO L472 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-07-23 15:23:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-07-23 15:23:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 15:23:05,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:05,332 INFO L353 BasicCegarLoop]: trace histogram [240, 1, 1, 1] [2018-07-23 15:23:05,332 INFO L414 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -310305215, now seen corresponding path program 240 times [2018-07-23 15:23:05,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 28920 backedges. 0 proven. 28920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:06,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:06,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [242] total 242 [2018-07-23 15:23:06,989 INFO L450 AbstractCegarLoop]: Interpolant automaton has 243 states [2018-07-23 15:23:06,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2018-07-23 15:23:06,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29403, Invalid=29403, Unknown=0, NotChecked=0, Total=58806 [2018-07-23 15:23:06,998 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 243 states. [2018-07-23 15:23:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:07,668 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 15:23:07,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2018-07-23 15:23:07,669 INFO L78 Accepts]: Start accepts. Automaton has 243 states. Word has length 243 [2018-07-23 15:23:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:07,669 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:23:07,669 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 15:23:07,674 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29403, Invalid=29403, Unknown=0, NotChecked=0, Total=58806 [2018-07-23 15:23:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 15:23:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-07-23 15:23:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 15:23:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 15:23:07,677 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 243 [2018-07-23 15:23:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:07,677 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 15:23:07,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 243 states. [2018-07-23 15:23:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 15:23:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 15:23:07,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:07,678 INFO L353 BasicCegarLoop]: trace histogram [241, 1, 1, 1] [2018-07-23 15:23:07,678 INFO L414 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1029529048, now seen corresponding path program 241 times [2018-07-23 15:23:07,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 29161 backedges. 0 proven. 29161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:09,368 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:09,368 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [243] total 243 [2018-07-23 15:23:09,368 INFO L450 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-07-23 15:23:09,372 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-07-23 15:23:09,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29646, Invalid=29646, Unknown=0, NotChecked=0, Total=59292 [2018-07-23 15:23:09,377 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 244 states. [2018-07-23 15:23:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:11,715 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2018-07-23 15:23:11,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2018-07-23 15:23:11,715 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 244 [2018-07-23 15:23:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:11,715 INFO L225 Difference]: With dead ends: 248 [2018-07-23 15:23:11,716 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 15:23:11,720 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29646, Invalid=29646, Unknown=0, NotChecked=0, Total=59292 [2018-07-23 15:23:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 15:23:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-07-23 15:23:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-23 15:23:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-07-23 15:23:11,724 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 244 [2018-07-23 15:23:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:11,724 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-07-23 15:23:11,725 INFO L472 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-07-23 15:23:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-07-23 15:23:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-23 15:23:11,725 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:11,725 INFO L353 BasicCegarLoop]: trace histogram [242, 1, 1, 1] [2018-07-23 15:23:11,725 INFO L414 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:11,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1850631391, now seen corresponding path program 242 times [2018-07-23 15:23:11,726 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:23:12,139 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:23:12,146 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:23:12,146 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:23:12 BoogieIcfgContainer [2018-07-23 15:23:12,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:23:12,152 INFO L168 Benchmark]: Toolchain (without parser) took 252133.96 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: -362.9 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-07-23 15:23:12,153 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:23:12,153 INFO L168 Benchmark]: Boogie Preprocessor took 43.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:23:12,154 INFO L168 Benchmark]: RCFGBuilder took 221.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:23:12,154 INFO L168 Benchmark]: TraceAbstraction took 251864.74 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: -373.5 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-07-23 15:23:12,155 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 221.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251864.74 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: -373.5 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 43). Cancelled while BasicCegarLoop was analyzing trace of length 246 with TraceHistMax 242, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 244 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 251.7s OverallTime, 243 OverallIterations, 242 TraceHistogramMax, 99.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 726 SDtfs, 0 SDslu, 15675 SDs, 0 SdLazy, 45320 SolverSat, 453 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29645 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 29403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=246occurred in iteration=242, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 242 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 12.3s SatisfiabilityAnalysisTime, 132.8s InterpolantComputationTime, 29887 NumberOfCodeBlocks, 29887 NumberOfCodeBlocksAsserted, 242 NumberOfCheckSat, 29645 ConstructedInterpolants, 0 QuantifiedInterpolants, 14378309 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 242 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2362041 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-23-12-167.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-23-12-167.csv Completed graceful shutdown