java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 13:20:22,793 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 13:20:22,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 13:20:22,807 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 13:20:22,808 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 13:20:22,809 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 13:20:22,810 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 13:20:22,812 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 13:20:22,814 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 13:20:22,815 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 13:20:22,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 13:20:22,816 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 13:20:22,817 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 13:20:22,818 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 13:20:22,819 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 13:20:22,820 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 13:20:22,821 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 13:20:22,822 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 13:20:22,825 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 13:20:22,826 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 13:20:22,827 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 13:20:22,829 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 13:20:22,834 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-25 13:20:22,850 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-07-25 13:20:22,866 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 13:20:22,867 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 13:20:22,868 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 13:20:22,869 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 13:20:22,869 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 13:20:22,869 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-25 13:20:22,870 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 13:20:22,870 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 13:20:22,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 13:20:22,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 13:20:22,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 13:20:22,950 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 13:20:22,951 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 13:20:22,952 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-07-25 13:20:22,952 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-07-25 13:20:23,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 13:20:23,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 13:20:23,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 13:20:23,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 13:20:23,024 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 13:20:23,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 13:20:23,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 13:20:23,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 13:20:23,063 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 13:20:23,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 13:20:23,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 13:20:23,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 13:20:23,083 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 13:20:23,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/1) ... [2018-07-25 13:20:23,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-25 13:20:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-25 13:20:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-25 13:20:23,302 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-25 13:20:23,303 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 01:20:23 BoogieIcfgContainer [2018-07-25 13:20:23,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 13:20:23,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 13:20:23,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 13:20:23,308 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 13:20:23,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:20:23" (1/2) ... [2018-07-25 13:20:23,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ae0393 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 01:20:23, skipping insertion in model container [2018-07-25 13:20:23,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 01:20:23" (2/2) ... [2018-07-25 13:20:23,313 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-07-25 13:20:23,323 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-25 13:20:23,332 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 13:20:23,384 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 13:20:23,385 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 13:20:23,385 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 13:20:23,385 INFO L376 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-25 13:20:23,385 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 13:20:23,385 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 13:20:23,386 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 13:20:23,386 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 13:20:23,386 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 13:20:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-25 13:20:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-25 13:20:23,410 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,411 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-25 13:20:23,412 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-07-25 13:20:23,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:20:23,521 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 13:20:23,521 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-25 13:20:23,526 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 13:20:23,542 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 13:20:23,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 13:20:23,548 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-25 13:20:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:23,594 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-07-25 13:20:23,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 13:20:23,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-25 13:20:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:23,607 INFO L225 Difference]: With dead ends: 11 [2018-07-25 13:20:23,607 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 13:20:23,611 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 13:20:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 13:20:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-07-25 13:20:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-25 13:20:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-07-25 13:20:23,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-07-25 13:20:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:23,651 INFO L472 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-07-25 13:20:23,651 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 13:20:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-07-25 13:20:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-25 13:20:23,652 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,653 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-07-25 13:20:23,653 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-07-25 13:20:23,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:20:23,688 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 13:20:23,689 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-25 13:20:23,691 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 13:20:23,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 13:20:23,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 13:20:23,694 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-07-25 13:20:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:23,718 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-07-25 13:20:23,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 13:20:23,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-07-25 13:20:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:23,719 INFO L225 Difference]: With dead ends: 11 [2018-07-25 13:20:23,720 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 13:20:23,722 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 13:20:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 13:20:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-25 13:20:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 13:20:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-07-25 13:20:23,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-07-25 13:20:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:23,727 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-07-25 13:20:23,727 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 13:20:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-07-25 13:20:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 13:20:23,728 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,729 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-25 13:20:23,729 INFO L415 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-07-25 13:20:23,731 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:20:23,775 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:23,775 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-25 13:20:23,776 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 13:20:23,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 13:20:23,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:20:23,782 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-07-25 13:20:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:23,803 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-07-25 13:20:23,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 13:20:23,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-25 13:20:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:23,805 INFO L225 Difference]: With dead ends: 13 [2018-07-25 13:20:23,805 INFO L226 Difference]: Without dead ends: 8 [2018-07-25 13:20:23,805 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:20:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-25 13:20:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-25 13:20:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-25 13:20:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-07-25 13:20:23,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-07-25 13:20:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:23,809 INFO L472 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-07-25 13:20:23,809 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 13:20:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-07-25 13:20:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-25 13:20:23,810 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,810 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-07-25 13:20:23,811 INFO L415 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-07-25 13:20:23,811 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-25 13:20:23,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:23,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 13:20:23,839 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 13:20:23,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 13:20:23,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:20:23,840 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-07-25 13:20:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:23,865 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-07-25 13:20:23,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 13:20:23,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-07-25 13:20:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:23,867 INFO L225 Difference]: With dead ends: 17 [2018-07-25 13:20:23,867 INFO L226 Difference]: Without dead ends: 15 [2018-07-25 13:20:23,868 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:20:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-25 13:20:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-07-25 13:20:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-25 13:20:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-07-25 13:20:23,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2018-07-25 13:20:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:23,883 INFO L472 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-07-25 13:20:23,884 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 13:20:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-07-25 13:20:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-25 13:20:23,885 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,885 INFO L354 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-07-25 13:20:23,886 INFO L415 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash 201207191, now seen corresponding path program 3 times [2018-07-25 13:20:23,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-25 13:20:23,956 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:23,956 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 13:20:23,958 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 13:20:23,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 13:20:23,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 13:20:23,959 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-07-25 13:20:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:23,975 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2018-07-25 13:20:23,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 13:20:23,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-25 13:20:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:23,977 INFO L225 Difference]: With dead ends: 21 [2018-07-25 13:20:23,977 INFO L226 Difference]: Without dead ends: 14 [2018-07-25 13:20:23,978 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 13:20:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-25 13:20:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-25 13:20:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-25 13:20:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-25 13:20:23,986 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-07-25 13:20:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:23,986 INFO L472 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-25 13:20:23,986 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 13:20:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-25 13:20:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-25 13:20:23,991 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:23,991 INFO L354 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-07-25 13:20:23,991 INFO L415 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 4 times [2018-07-25 13:20:23,992 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-25 13:20:24,024 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-25 13:20:24,025 INFO L451 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-25 13:20:24,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-25 13:20:24,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:20:24,026 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-07-25 13:20:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,041 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-07-25 13:20:24,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 13:20:24,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-07-25 13:20:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,042 INFO L225 Difference]: With dead ends: 24 [2018-07-25 13:20:24,042 INFO L226 Difference]: Without dead ends: 16 [2018-07-25 13:20:24,043 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:20:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-25 13:20:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-25 13:20:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-25 13:20:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-07-25 13:20:24,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-07-25 13:20:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,056 INFO L472 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-07-25 13:20:24,056 INFO L473 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-25 13:20:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-07-25 13:20:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-25 13:20:24,056 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,057 INFO L354 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-07-25 13:20:24,057 INFO L415 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 5 times [2018-07-25 13:20:24,059 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-25 13:20:24,116 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,117 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-25 13:20:24,117 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 13:20:24,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 13:20:24,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 13:20:24,118 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-07-25 13:20:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,140 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-07-25 13:20:24,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 13:20:24,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-07-25 13:20:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,141 INFO L225 Difference]: With dead ends: 29 [2018-07-25 13:20:24,142 INFO L226 Difference]: Without dead ends: 27 [2018-07-25 13:20:24,142 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 13:20:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-25 13:20:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-07-25 13:20:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-25 13:20:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-07-25 13:20:24,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2018-07-25 13:20:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,153 INFO L472 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-07-25 13:20:24,153 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 13:20:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-07-25 13:20:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-25 13:20:24,155 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,155 INFO L354 BasicCegarLoop]: trace histogram [12, 3, 3, 1, 1, 1] [2018-07-25 13:20:24,156 INFO L415 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash -569669823, now seen corresponding path program 6 times [2018-07-25 13:20:24,156 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-07-25 13:20:24,236 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,236 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 13:20:24,236 INFO L451 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-25 13:20:24,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-25 13:20:24,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:20:24,238 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2018-07-25 13:20:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,287 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-07-25 13:20:24,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 13:20:24,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-07-25 13:20:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,288 INFO L225 Difference]: With dead ends: 35 [2018-07-25 13:20:24,288 INFO L226 Difference]: Without dead ends: 33 [2018-07-25 13:20:24,289 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:20:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-25 13:20:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-07-25 13:20:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-25 13:20:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-07-25 13:20:24,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2018-07-25 13:20:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,307 INFO L472 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-07-25 13:20:24,307 INFO L473 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-25 13:20:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-07-25 13:20:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-25 13:20:24,309 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,309 INFO L354 BasicCegarLoop]: trace histogram [16, 4, 4, 1, 1, 1] [2018-07-25 13:20:24,309 INFO L415 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash -384158805, now seen corresponding path program 7 times [2018-07-25 13:20:24,310 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-07-25 13:20:24,375 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,375 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-25 13:20:24,376 INFO L451 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-25 13:20:24,376 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-25 13:20:24,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 13:20:24,379 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2018-07-25 13:20:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,410 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2018-07-25 13:20:24,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-25 13:20:24,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-07-25 13:20:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,412 INFO L225 Difference]: With dead ends: 53 [2018-07-25 13:20:24,412 INFO L226 Difference]: Without dead ends: 32 [2018-07-25 13:20:24,413 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 13:20:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-25 13:20:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-25 13:20:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-25 13:20:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-07-25 13:20:24,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2018-07-25 13:20:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,423 INFO L472 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-07-25 13:20:24,424 INFO L473 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-25 13:20:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-07-25 13:20:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-25 13:20:24,425 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,425 INFO L354 BasicCegarLoop]: trace histogram [20, 4, 4, 1, 1, 1] [2018-07-25 13:20:24,425 INFO L415 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1897277373, now seen corresponding path program 8 times [2018-07-25 13:20:24,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-07-25 13:20:24,472 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,472 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-25 13:20:24,475 INFO L451 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-25 13:20:24,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-25 13:20:24,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 13:20:24,476 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-07-25 13:20:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,514 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-07-25 13:20:24,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-25 13:20:24,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-07-25 13:20:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,516 INFO L225 Difference]: With dead ends: 60 [2018-07-25 13:20:24,516 INFO L226 Difference]: Without dead ends: 36 [2018-07-25 13:20:24,517 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 13:20:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-25 13:20:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-25 13:20:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-25 13:20:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-07-25 13:20:24,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2018-07-25 13:20:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,530 INFO L472 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-07-25 13:20:24,530 INFO L473 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-25 13:20:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-07-25 13:20:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-25 13:20:24,531 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,531 INFO L354 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-07-25 13:20:24,532 INFO L415 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 9 times [2018-07-25 13:20:24,532 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-07-25 13:20:24,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-25 13:20:24,575 INFO L451 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-25 13:20:24,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-25 13:20:24,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 13:20:24,576 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-07-25 13:20:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,604 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-07-25 13:20:24,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-25 13:20:24,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-07-25 13:20:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,605 INFO L225 Difference]: With dead ends: 67 [2018-07-25 13:20:24,605 INFO L226 Difference]: Without dead ends: 40 [2018-07-25 13:20:24,606 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 13:20:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-25 13:20:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-25 13:20:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-25 13:20:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-07-25 13:20:24,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-07-25 13:20:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,624 INFO L472 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-07-25 13:20:24,624 INFO L473 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-25 13:20:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-07-25 13:20:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-25 13:20:24,625 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,625 INFO L354 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-07-25 13:20:24,626 INFO L415 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 10 times [2018-07-25 13:20:24,626 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-07-25 13:20:24,680 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,680 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-25 13:20:24,681 INFO L451 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-25 13:20:24,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-25 13:20:24,682 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 13:20:24,682 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2018-07-25 13:20:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,719 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2018-07-25 13:20:24,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-25 13:20:24,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-07-25 13:20:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,721 INFO L225 Difference]: With dead ends: 59 [2018-07-25 13:20:24,722 INFO L226 Difference]: Without dead ends: 57 [2018-07-25 13:20:24,722 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 13:20:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-25 13:20:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2018-07-25 13:20:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-25 13:20:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-07-25 13:20:24,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 39 [2018-07-25 13:20:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,742 INFO L472 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-07-25 13:20:24,742 INFO L473 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-25 13:20:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-07-25 13:20:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-25 13:20:24,748 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,749 INFO L354 BasicCegarLoop]: trace histogram [35, 5, 5, 1, 1, 1] [2018-07-25 13:20:24,750 INFO L415 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1933961390, now seen corresponding path program 11 times [2018-07-25 13:20:24,750 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-07-25 13:20:24,827 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-25 13:20:24,828 INFO L451 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-25 13:20:24,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-25 13:20:24,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 13:20:24,829 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2018-07-25 13:20:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:24,864 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-07-25 13:20:24,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-25 13:20:24,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2018-07-25 13:20:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:24,866 INFO L225 Difference]: With dead ends: 68 [2018-07-25 13:20:24,866 INFO L226 Difference]: Without dead ends: 66 [2018-07-25 13:20:24,871 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-25 13:20:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-25 13:20:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-07-25 13:20:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-25 13:20:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2018-07-25 13:20:24,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 48 [2018-07-25 13:20:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:24,893 INFO L472 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2018-07-25 13:20:24,893 INFO L473 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-25 13:20:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2018-07-25 13:20:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-25 13:20:24,896 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:24,896 INFO L354 BasicCegarLoop]: trace histogram [42, 6, 6, 1, 1, 1] [2018-07-25 13:20:24,897 INFO L415 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash -529480157, now seen corresponding path program 12 times [2018-07-25 13:20:24,897 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 981 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-07-25 13:20:24,966 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:24,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-25 13:20:24,967 INFO L451 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-25 13:20:24,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-25 13:20:24,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 13:20:24,968 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2018-07-25 13:20:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,000 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2018-07-25 13:20:25,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-25 13:20:25,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2018-07-25 13:20:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,001 INFO L225 Difference]: With dead ends: 77 [2018-07-25 13:20:25,002 INFO L226 Difference]: Without dead ends: 75 [2018-07-25 13:20:25,002 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-25 13:20:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-25 13:20:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2018-07-25 13:20:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-25 13:20:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2018-07-25 13:20:25,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 57 [2018-07-25 13:20:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,018 INFO L472 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2018-07-25 13:20:25,018 INFO L473 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-25 13:20:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2018-07-25 13:20:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-25 13:20:25,020 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,020 INFO L354 BasicCegarLoop]: trace histogram [49, 7, 7, 1, 1, 1] [2018-07-25 13:20:25,020 INFO L415 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1363198898, now seen corresponding path program 13 times [2018-07-25 13:20:25,021 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 391 proven. 28 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2018-07-25 13:20:25,070 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-25 13:20:25,071 INFO L451 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-25 13:20:25,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-25 13:20:25,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 13:20:25,072 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 10 states. [2018-07-25 13:20:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,094 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2018-07-25 13:20:25,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-25 13:20:25,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2018-07-25 13:20:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,095 INFO L225 Difference]: With dead ends: 131 [2018-07-25 13:20:25,095 INFO L226 Difference]: Without dead ends: 74 [2018-07-25 13:20:25,096 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 13:20:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-25 13:20:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-25 13:20:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-25 13:20:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-07-25 13:20:25,114 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 66 [2018-07-25 13:20:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,115 INFO L472 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-07-25 13:20:25,115 INFO L473 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-25 13:20:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-07-25 13:20:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-25 13:20:25,116 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,117 INFO L354 BasicCegarLoop]: trace histogram [56, 7, 7, 1, 1, 1] [2018-07-25 13:20:25,117 INFO L415 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1515039575, now seen corresponding path program 14 times [2018-07-25 13:20:25,118 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-07-25 13:20:25,195 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,195 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-25 13:20:25,196 INFO L451 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-25 13:20:25,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-25 13:20:25,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 13:20:25,197 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2018-07-25 13:20:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,226 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2018-07-25 13:20:25,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-25 13:20:25,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2018-07-25 13:20:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,228 INFO L225 Difference]: With dead ends: 95 [2018-07-25 13:20:25,228 INFO L226 Difference]: Without dead ends: 93 [2018-07-25 13:20:25,229 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-25 13:20:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-25 13:20:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2018-07-25 13:20:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-25 13:20:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2018-07-25 13:20:25,247 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 73 [2018-07-25 13:20:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,248 INFO L472 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2018-07-25 13:20:25,248 INFO L473 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-25 13:20:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2018-07-25 13:20:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-25 13:20:25,249 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,250 INFO L354 BasicCegarLoop]: trace histogram [64, 8, 8, 1, 1, 1] [2018-07-25 13:20:25,250 INFO L415 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash -603639725, now seen corresponding path program 15 times [2018-07-25 13:20:25,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 575 proven. 36 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2018-07-25 13:20:25,320 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,320 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-25 13:20:25,321 INFO L451 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-25 13:20:25,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-25 13:20:25,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 13:20:25,323 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 11 states. [2018-07-25 13:20:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,349 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2018-07-25 13:20:25,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-25 13:20:25,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2018-07-25 13:20:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,351 INFO L225 Difference]: With dead ends: 165 [2018-07-25 13:20:25,351 INFO L226 Difference]: Without dead ends: 92 [2018-07-25 13:20:25,352 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 13:20:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-25 13:20:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-25 13:20:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-25 13:20:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2018-07-25 13:20:25,369 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 83 [2018-07-25 13:20:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,369 INFO L472 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2018-07-25 13:20:25,369 INFO L473 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-25 13:20:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2018-07-25 13:20:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-25 13:20:25,371 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,371 INFO L354 BasicCegarLoop]: trace histogram [72, 8, 8, 1, 1, 1] [2018-07-25 13:20:25,372 INFO L415 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1521070467, now seen corresponding path program 16 times [2018-07-25 13:20:25,372 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 708 proven. 45 refuted. 0 times theorem prover too weak. 2443 trivial. 0 not checked. [2018-07-25 13:20:25,439 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,439 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-25 13:20:25,440 INFO L451 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-25 13:20:25,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-25 13:20:25,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 13:20:25,441 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 12 states. [2018-07-25 13:20:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,466 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2018-07-25 13:20:25,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-25 13:20:25,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2018-07-25 13:20:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,468 INFO L225 Difference]: With dead ends: 180 [2018-07-25 13:20:25,468 INFO L226 Difference]: Without dead ends: 100 [2018-07-25 13:20:25,469 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 13:20:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-25 13:20:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-25 13:20:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-25 13:20:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-07-25 13:20:25,486 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 91 [2018-07-25 13:20:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,486 INFO L472 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-07-25 13:20:25,487 INFO L473 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-25 13:20:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-07-25 13:20:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-25 13:20:25,488 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,488 INFO L354 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-07-25 13:20:25,489 INFO L415 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 17 times [2018-07-25 13:20:25,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-07-25 13:20:25,583 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,583 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-25 13:20:25,584 INFO L451 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-25 13:20:25,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-25 13:20:25,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 13:20:25,585 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-07-25 13:20:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,621 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-07-25 13:20:25,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-25 13:20:25,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-07-25 13:20:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,623 INFO L225 Difference]: With dead ends: 125 [2018-07-25 13:20:25,623 INFO L226 Difference]: Without dead ends: 123 [2018-07-25 13:20:25,624 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-25 13:20:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-25 13:20:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-07-25 13:20:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-25 13:20:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-07-25 13:20:25,645 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-07-25 13:20:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,646 INFO L472 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-07-25 13:20:25,646 INFO L473 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-25 13:20:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-07-25 13:20:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-25 13:20:25,648 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,648 INFO L354 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-07-25 13:20:25,648 INFO L415 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 18 times [2018-07-25 13:20:25,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-07-25 13:20:25,753 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-25 13:20:25,753 INFO L451 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-25 13:20:25,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-25 13:20:25,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 13:20:25,754 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-07-25 13:20:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:25,795 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-07-25 13:20:25,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-25 13:20:25,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-07-25 13:20:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:25,796 INFO L225 Difference]: With dead ends: 137 [2018-07-25 13:20:25,797 INFO L226 Difference]: Without dead ends: 135 [2018-07-25 13:20:25,797 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-25 13:20:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-25 13:20:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-07-25 13:20:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-25 13:20:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-07-25 13:20:25,823 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-07-25 13:20:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:25,823 INFO L472 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-07-25 13:20:25,823 INFO L473 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-25 13:20:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-07-25 13:20:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-25 13:20:25,825 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:25,825 INFO L354 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-07-25 13:20:25,825 INFO L415 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:25,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 19 times [2018-07-25 13:20:25,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-07-25 13:20:25,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:25,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-25 13:20:25,954 INFO L451 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-25 13:20:25,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-25 13:20:25,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-25 13:20:25,955 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-07-25 13:20:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:26,004 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-07-25 13:20:26,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-25 13:20:26,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-07-25 13:20:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:26,006 INFO L225 Difference]: With dead ends: 149 [2018-07-25 13:20:26,006 INFO L226 Difference]: Without dead ends: 147 [2018-07-25 13:20:26,007 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-25 13:20:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-25 13:20:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-07-25 13:20:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-25 13:20:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-07-25 13:20:26,035 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-07-25 13:20:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:26,036 INFO L472 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-07-25 13:20:26,036 INFO L473 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-25 13:20:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-07-25 13:20:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-25 13:20:26,038 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:26,038 INFO L354 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-07-25 13:20:26,038 INFO L415 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 20 times [2018-07-25 13:20:26,039 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-07-25 13:20:26,174 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:26,174 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-25 13:20:26,174 INFO L451 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-25 13:20:26,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-25 13:20:26,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-25 13:20:26,175 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-07-25 13:20:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:26,229 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-07-25 13:20:26,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-25 13:20:26,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-07-25 13:20:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:26,237 INFO L225 Difference]: With dead ends: 161 [2018-07-25 13:20:26,238 INFO L226 Difference]: Without dead ends: 159 [2018-07-25 13:20:26,238 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-25 13:20:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-25 13:20:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-07-25 13:20:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-25 13:20:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-07-25 13:20:26,274 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-07-25 13:20:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:26,275 INFO L472 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-07-25 13:20:26,275 INFO L473 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-25 13:20:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-07-25 13:20:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-25 13:20:26,277 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:26,277 INFO L354 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-07-25 13:20:26,277 INFO L415 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:26,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 21 times [2018-07-25 13:20:26,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-07-25 13:20:26,447 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:26,447 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-25 13:20:26,448 INFO L451 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-25 13:20:26,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-25 13:20:26,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-25 13:20:26,449 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-07-25 13:20:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:26,515 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-07-25 13:20:26,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-25 13:20:26,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-07-25 13:20:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:26,517 INFO L225 Difference]: With dead ends: 173 [2018-07-25 13:20:26,517 INFO L226 Difference]: Without dead ends: 171 [2018-07-25 13:20:26,518 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-25 13:20:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-25 13:20:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-07-25 13:20:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-25 13:20:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-07-25 13:20:26,559 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-07-25 13:20:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:26,559 INFO L472 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-07-25 13:20:26,559 INFO L473 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-25 13:20:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-07-25 13:20:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-25 13:20:26,562 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:26,562 INFO L354 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-07-25 13:20:26,562 INFO L415 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 22 times [2018-07-25 13:20:26,563 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-07-25 13:20:26,792 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:26,792 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-25 13:20:26,793 INFO L451 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-25 13:20:26,793 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-25 13:20:26,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-25 13:20:26,794 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-07-25 13:20:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:26,857 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-07-25 13:20:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-25 13:20:26,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-07-25 13:20:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:26,860 INFO L225 Difference]: With dead ends: 185 [2018-07-25 13:20:26,860 INFO L226 Difference]: Without dead ends: 183 [2018-07-25 13:20:26,861 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-25 13:20:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-25 13:20:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-07-25 13:20:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-25 13:20:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-07-25 13:20:26,904 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-07-25 13:20:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:26,905 INFO L472 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-07-25 13:20:26,905 INFO L473 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-25 13:20:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-07-25 13:20:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-25 13:20:26,906 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:26,907 INFO L354 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-07-25 13:20:26,907 INFO L415 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 23 times [2018-07-25 13:20:26,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-07-25 13:20:27,050 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:27,050 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-25 13:20:27,050 INFO L451 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-25 13:20:27,051 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-25 13:20:27,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-25 13:20:27,051 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-07-25 13:20:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:27,123 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-07-25 13:20:27,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-25 13:20:27,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-07-25 13:20:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:27,125 INFO L225 Difference]: With dead ends: 197 [2018-07-25 13:20:27,125 INFO L226 Difference]: Without dead ends: 195 [2018-07-25 13:20:27,126 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-25 13:20:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-25 13:20:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-07-25 13:20:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-25 13:20:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-07-25 13:20:27,172 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-07-25 13:20:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:27,173 INFO L472 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-07-25 13:20:27,173 INFO L473 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-25 13:20:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-07-25 13:20:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-25 13:20:27,175 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:27,175 INFO L354 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-07-25 13:20:27,175 INFO L415 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:27,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 24 times [2018-07-25 13:20:27,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-07-25 13:20:27,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:27,327 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-25 13:20:27,327 INFO L451 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-25 13:20:27,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-25 13:20:27,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-25 13:20:27,328 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-07-25 13:20:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:27,404 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-07-25 13:20:27,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-25 13:20:27,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-07-25 13:20:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:27,406 INFO L225 Difference]: With dead ends: 209 [2018-07-25 13:20:27,406 INFO L226 Difference]: Without dead ends: 207 [2018-07-25 13:20:27,407 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-25 13:20:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-25 13:20:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-07-25 13:20:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-25 13:20:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-07-25 13:20:27,458 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-07-25 13:20:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:27,458 INFO L472 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-07-25 13:20:27,458 INFO L473 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-25 13:20:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-07-25 13:20:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-25 13:20:27,460 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:27,461 INFO L354 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-07-25 13:20:27,461 INFO L415 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 25 times [2018-07-25 13:20:27,461 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-07-25 13:20:27,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:27,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-25 13:20:27,615 INFO L451 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-25 13:20:27,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-25 13:20:27,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-25 13:20:27,616 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-07-25 13:20:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:27,701 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-07-25 13:20:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-25 13:20:27,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-07-25 13:20:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:27,703 INFO L225 Difference]: With dead ends: 221 [2018-07-25 13:20:27,703 INFO L226 Difference]: Without dead ends: 219 [2018-07-25 13:20:27,704 INFO L574 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 [2018-07-25 13:20:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-25 13:20:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-07-25 13:20:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-25 13:20:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-07-25 13:20:27,762 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-07-25 13:20:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:27,762 INFO L472 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-07-25 13:20:27,763 INFO L473 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-25 13:20:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-07-25 13:20:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-25 13:20:27,765 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:27,765 INFO L354 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-07-25 13:20:27,765 INFO L415 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 26 times [2018-07-25 13:20:27,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-07-25 13:20:27,943 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:27,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-25 13:20:27,944 INFO L451 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-25 13:20:27,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-25 13:20:27,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-25 13:20:27,945 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-07-25 13:20:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:28,049 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-07-25 13:20:28,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-25 13:20:28,049 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-07-25 13:20:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:28,051 INFO L225 Difference]: With dead ends: 233 [2018-07-25 13:20:28,051 INFO L226 Difference]: Without dead ends: 231 [2018-07-25 13:20:28,052 INFO L574 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 [2018-07-25 13:20:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-25 13:20:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-07-25 13:20:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-25 13:20:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-07-25 13:20:28,112 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-07-25 13:20:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:28,112 INFO L472 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-07-25 13:20:28,112 INFO L473 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-25 13:20:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-07-25 13:20:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-25 13:20:28,115 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:28,115 INFO L354 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-07-25 13:20:28,115 INFO L415 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 27 times [2018-07-25 13:20:28,116 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-07-25 13:20:28,322 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:28,322 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-25 13:20:28,323 INFO L451 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-25 13:20:28,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-25 13:20:28,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-25 13:20:28,324 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-07-25 13:20:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:28,437 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-07-25 13:20:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-25 13:20:28,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-07-25 13:20:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:28,439 INFO L225 Difference]: With dead ends: 245 [2018-07-25 13:20:28,440 INFO L226 Difference]: Without dead ends: 243 [2018-07-25 13:20:28,440 INFO L574 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 [2018-07-25 13:20:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-25 13:20:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-07-25 13:20:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-25 13:20:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-07-25 13:20:28,518 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-07-25 13:20:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:28,519 INFO L472 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-07-25 13:20:28,519 INFO L473 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-25 13:20:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-07-25 13:20:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-25 13:20:28,523 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:28,523 INFO L354 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-07-25 13:20:28,523 INFO L415 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 28 times [2018-07-25 13:20:28,524 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-07-25 13:20:28,773 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:28,773 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-25 13:20:28,774 INFO L451 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-25 13:20:28,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-25 13:20:28,774 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-25 13:20:28,774 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-07-25 13:20:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:28,876 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-07-25 13:20:28,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-25 13:20:28,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-07-25 13:20:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:28,878 INFO L225 Difference]: With dead ends: 257 [2018-07-25 13:20:28,878 INFO L226 Difference]: Without dead ends: 255 [2018-07-25 13:20:28,879 INFO L574 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 [2018-07-25 13:20:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-25 13:20:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-07-25 13:20:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-25 13:20:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-07-25 13:20:28,952 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-07-25 13:20:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:28,953 INFO L472 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-07-25 13:20:28,953 INFO L473 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-25 13:20:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-07-25 13:20:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-25 13:20:28,955 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:28,956 INFO L354 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-07-25 13:20:28,956 INFO L415 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 29 times [2018-07-25 13:20:28,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-07-25 13:20:29,167 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:29,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-25 13:20:29,168 INFO L451 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-25 13:20:29,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-25 13:20:29,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-25 13:20:29,169 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-07-25 13:20:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:29,285 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-07-25 13:20:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-25 13:20:29,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-07-25 13:20:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:29,287 INFO L225 Difference]: With dead ends: 269 [2018-07-25 13:20:29,288 INFO L226 Difference]: Without dead ends: 267 [2018-07-25 13:20:29,288 INFO L574 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 [2018-07-25 13:20:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-25 13:20:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-07-25 13:20:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-25 13:20:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-07-25 13:20:29,376 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-07-25 13:20:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:29,377 INFO L472 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-07-25 13:20:29,377 INFO L473 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-25 13:20:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-07-25 13:20:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-25 13:20:29,380 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:29,380 INFO L354 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-07-25 13:20:29,381 INFO L415 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 30 times [2018-07-25 13:20:29,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-07-25 13:20:29,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:29,590 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-25 13:20:29,590 INFO L451 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-25 13:20:29,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-25 13:20:29,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-25 13:20:29,591 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-07-25 13:20:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:29,703 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-07-25 13:20:29,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-25 13:20:29,704 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-07-25 13:20:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:29,706 INFO L225 Difference]: With dead ends: 281 [2018-07-25 13:20:29,706 INFO L226 Difference]: Without dead ends: 279 [2018-07-25 13:20:29,707 INFO L574 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 [2018-07-25 13:20:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-25 13:20:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-07-25 13:20:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-25 13:20:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-07-25 13:20:29,798 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-07-25 13:20:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:29,798 INFO L472 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-07-25 13:20:29,798 INFO L473 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-25 13:20:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-07-25 13:20:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-25 13:20:29,803 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:29,803 INFO L354 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-07-25 13:20:29,803 INFO L415 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 31 times [2018-07-25 13:20:29,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-07-25 13:20:30,045 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:30,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-25 13:20:30,046 INFO L451 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-25 13:20:30,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-25 13:20:30,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-25 13:20:30,047 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-07-25 13:20:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:30,173 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-07-25 13:20:30,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-25 13:20:30,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-07-25 13:20:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:30,175 INFO L225 Difference]: With dead ends: 293 [2018-07-25 13:20:30,175 INFO L226 Difference]: Without dead ends: 291 [2018-07-25 13:20:30,176 INFO L574 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 [2018-07-25 13:20:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-25 13:20:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-07-25 13:20:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-25 13:20:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-07-25 13:20:30,268 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-07-25 13:20:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:30,269 INFO L472 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-07-25 13:20:30,269 INFO L473 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-25 13:20:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-07-25 13:20:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-25 13:20:30,273 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:30,273 INFO L354 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-07-25 13:20:30,274 INFO L415 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 32 times [2018-07-25 13:20:30,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-07-25 13:20:30,576 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:30,576 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-25 13:20:30,576 INFO L451 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-25 13:20:30,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-25 13:20:30,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-25 13:20:30,578 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-07-25 13:20:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:30,735 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-07-25 13:20:30,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-25 13:20:30,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-07-25 13:20:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:30,738 INFO L225 Difference]: With dead ends: 305 [2018-07-25 13:20:30,738 INFO L226 Difference]: Without dead ends: 303 [2018-07-25 13:20:30,739 INFO L574 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 [2018-07-25 13:20:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-25 13:20:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-07-25 13:20:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-25 13:20:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-07-25 13:20:30,867 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-07-25 13:20:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:30,868 INFO L472 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-07-25 13:20:30,868 INFO L473 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-25 13:20:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-07-25 13:20:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-25 13:20:30,873 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:30,873 INFO L354 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-07-25 13:20:30,874 INFO L415 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 33 times [2018-07-25 13:20:30,874 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-07-25 13:20:31,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:31,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-25 13:20:31,204 INFO L451 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-25 13:20:31,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-25 13:20:31,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-25 13:20:31,205 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-07-25 13:20:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:31,365 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-07-25 13:20:31,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-25 13:20:31,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-07-25 13:20:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:31,367 INFO L225 Difference]: With dead ends: 317 [2018-07-25 13:20:31,368 INFO L226 Difference]: Without dead ends: 315 [2018-07-25 13:20:31,368 INFO L574 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 [2018-07-25 13:20:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-25 13:20:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-07-25 13:20:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-07-25 13:20:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-07-25 13:20:31,480 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-07-25 13:20:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:31,481 INFO L472 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-07-25 13:20:31,481 INFO L473 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-25 13:20:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-07-25 13:20:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-07-25 13:20:31,486 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:31,487 INFO L354 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-07-25 13:20:31,487 INFO L415 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 34 times [2018-07-25 13:20:31,487 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-07-25 13:20:31,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:31,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-25 13:20:31,747 INFO L451 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-25 13:20:31,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-25 13:20:31,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-25 13:20:31,749 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-07-25 13:20:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:31,895 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-07-25 13:20:31,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-25 13:20:31,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-07-25 13:20:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:31,897 INFO L225 Difference]: With dead ends: 329 [2018-07-25 13:20:31,898 INFO L226 Difference]: Without dead ends: 327 [2018-07-25 13:20:31,898 INFO L574 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 [2018-07-25 13:20:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-07-25 13:20:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-07-25 13:20:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-07-25 13:20:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-07-25 13:20:32,014 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-07-25 13:20:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:32,014 INFO L472 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-07-25 13:20:32,015 INFO L473 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-25 13:20:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-07-25 13:20:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-07-25 13:20:32,017 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:32,017 INFO L354 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-07-25 13:20:32,018 INFO L415 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 35 times [2018-07-25 13:20:32,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-07-25 13:20:32,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:32,271 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-25 13:20:32,271 INFO L451 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-25 13:20:32,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-25 13:20:32,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-25 13:20:32,272 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-07-25 13:20:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:32,429 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-07-25 13:20:32,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-25 13:20:32,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-07-25 13:20:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:32,431 INFO L225 Difference]: With dead ends: 341 [2018-07-25 13:20:32,432 INFO L226 Difference]: Without dead ends: 339 [2018-07-25 13:20:32,432 INFO L574 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 [2018-07-25 13:20:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-07-25 13:20:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-07-25 13:20:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-07-25 13:20:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-07-25 13:20:32,564 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-07-25 13:20:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:32,565 INFO L472 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-07-25 13:20:32,565 INFO L473 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-25 13:20:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-07-25 13:20:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-07-25 13:20:32,572 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:32,575 INFO L354 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-07-25 13:20:32,575 INFO L415 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 36 times [2018-07-25 13:20:32,576 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-07-25 13:20:32,945 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:32,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-25 13:20:32,946 INFO L451 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-25 13:20:32,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-25 13:20:32,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-25 13:20:32,947 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-07-25 13:20:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:33,162 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-07-25 13:20:33,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-25 13:20:33,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-07-25 13:20:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:33,164 INFO L225 Difference]: With dead ends: 353 [2018-07-25 13:20:33,164 INFO L226 Difference]: Without dead ends: 351 [2018-07-25 13:20:33,165 INFO L574 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 [2018-07-25 13:20:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-07-25 13:20:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-07-25 13:20:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-07-25 13:20:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-07-25 13:20:33,321 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-07-25 13:20:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:33,322 INFO L472 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-07-25 13:20:33,322 INFO L473 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-25 13:20:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-07-25 13:20:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-07-25 13:20:33,324 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:33,325 INFO L354 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-07-25 13:20:33,325 INFO L415 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 37 times [2018-07-25 13:20:33,325 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-07-25 13:20:33,641 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:33,641 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-25 13:20:33,641 INFO L451 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-25 13:20:33,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-25 13:20:33,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-25 13:20:33,643 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-07-25 13:20:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:33,828 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-07-25 13:20:33,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-25 13:20:33,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-07-25 13:20:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:33,831 INFO L225 Difference]: With dead ends: 365 [2018-07-25 13:20:33,831 INFO L226 Difference]: Without dead ends: 363 [2018-07-25 13:20:33,832 INFO L574 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 [2018-07-25 13:20:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-07-25 13:20:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-07-25 13:20:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-07-25 13:20:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-07-25 13:20:33,977 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-07-25 13:20:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:33,978 INFO L472 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-07-25 13:20:33,978 INFO L473 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-25 13:20:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-07-25 13:20:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-07-25 13:20:33,981 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:33,981 INFO L354 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-07-25 13:20:33,981 INFO L415 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 38 times [2018-07-25 13:20:33,982 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-07-25 13:20:34,334 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:34,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-25 13:20:34,335 INFO L451 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-25 13:20:34,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-25 13:20:34,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-25 13:20:34,336 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-07-25 13:20:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:34,564 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-07-25 13:20:34,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-25 13:20:34,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-07-25 13:20:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:34,569 INFO L225 Difference]: With dead ends: 377 [2018-07-25 13:20:34,569 INFO L226 Difference]: Without dead ends: 375 [2018-07-25 13:20:34,570 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-25 13:20:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-07-25 13:20:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-07-25 13:20:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-25 13:20:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-07-25 13:20:34,747 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-07-25 13:20:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:34,748 INFO L472 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-07-25 13:20:34,748 INFO L473 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-25 13:20:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-07-25 13:20:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-25 13:20:34,751 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:34,751 INFO L354 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-07-25 13:20:34,751 INFO L415 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 39 times [2018-07-25 13:20:34,752 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-07-25 13:20:35,073 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:35,074 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-25 13:20:35,074 INFO L451 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-25 13:20:35,074 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-25 13:20:35,075 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-25 13:20:35,075 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-07-25 13:20:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:35,279 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-07-25 13:20:35,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-25 13:20:35,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-07-25 13:20:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:35,282 INFO L225 Difference]: With dead ends: 389 [2018-07-25 13:20:35,283 INFO L226 Difference]: Without dead ends: 387 [2018-07-25 13:20:35,284 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-25 13:20:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-07-25 13:20:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-07-25 13:20:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-07-25 13:20:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-07-25 13:20:35,501 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-07-25 13:20:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:35,502 INFO L472 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-07-25 13:20:35,502 INFO L473 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-25 13:20:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-07-25 13:20:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-07-25 13:20:35,504 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:35,505 INFO L354 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-07-25 13:20:35,505 INFO L415 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 40 times [2018-07-25 13:20:35,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-07-25 13:20:35,818 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:35,818 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-25 13:20:35,818 INFO L451 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-25 13:20:35,819 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-25 13:20:35,819 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-25 13:20:35,820 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-07-25 13:20:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:36,072 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-07-25 13:20:36,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-25 13:20:36,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-07-25 13:20:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:36,075 INFO L225 Difference]: With dead ends: 401 [2018-07-25 13:20:36,076 INFO L226 Difference]: Without dead ends: 399 [2018-07-25 13:20:36,077 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-25 13:20:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-07-25 13:20:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-07-25 13:20:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-07-25 13:20:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-07-25 13:20:36,289 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-07-25 13:20:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:36,290 INFO L472 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-07-25 13:20:36,290 INFO L473 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-25 13:20:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-07-25 13:20:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-25 13:20:36,293 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:36,293 INFO L354 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-07-25 13:20:36,294 INFO L415 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 41 times [2018-07-25 13:20:36,294 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-07-25 13:20:36,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:36,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-25 13:20:36,640 INFO L451 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-25 13:20:36,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-25 13:20:36,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-25 13:20:36,642 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-07-25 13:20:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:36,890 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-07-25 13:20:36,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-25 13:20:36,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-07-25 13:20:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:36,895 INFO L225 Difference]: With dead ends: 413 [2018-07-25 13:20:36,895 INFO L226 Difference]: Without dead ends: 411 [2018-07-25 13:20:36,896 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-25 13:20:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-07-25 13:20:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-07-25 13:20:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-07-25 13:20:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-07-25 13:20:37,110 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-07-25 13:20:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:37,111 INFO L472 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-07-25 13:20:37,111 INFO L473 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-25 13:20:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-07-25 13:20:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-07-25 13:20:37,114 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:37,114 INFO L354 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-07-25 13:20:37,114 INFO L415 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 42 times [2018-07-25 13:20:37,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-07-25 13:20:37,492 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:37,492 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-25 13:20:37,492 INFO L451 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-25 13:20:37,493 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-25 13:20:37,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-25 13:20:37,494 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-07-25 13:20:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:37,799 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-07-25 13:20:37,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-25 13:20:37,800 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-07-25 13:20:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:37,803 INFO L225 Difference]: With dead ends: 425 [2018-07-25 13:20:37,803 INFO L226 Difference]: Without dead ends: 423 [2018-07-25 13:20:37,805 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-25 13:20:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-07-25 13:20:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-07-25 13:20:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-07-25 13:20:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-07-25 13:20:38,051 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-07-25 13:20:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:38,051 INFO L472 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-07-25 13:20:38,052 INFO L473 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-25 13:20:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-07-25 13:20:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-07-25 13:20:38,055 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:38,055 INFO L354 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-07-25 13:20:38,056 INFO L415 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 43 times [2018-07-25 13:20:38,056 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-07-25 13:20:38,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:38,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-25 13:20:38,497 INFO L451 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-25 13:20:38,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-25 13:20:38,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-25 13:20:38,498 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-07-25 13:20:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:38,763 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-07-25 13:20:38,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-25 13:20:38,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-07-25 13:20:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:38,766 INFO L225 Difference]: With dead ends: 437 [2018-07-25 13:20:38,767 INFO L226 Difference]: Without dead ends: 435 [2018-07-25 13:20:38,768 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-25 13:20:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-07-25 13:20:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-07-25 13:20:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-07-25 13:20:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-07-25 13:20:38,987 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-07-25 13:20:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:38,988 INFO L472 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-07-25 13:20:38,988 INFO L473 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-25 13:20:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-07-25 13:20:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-07-25 13:20:38,991 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:38,991 INFO L354 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-07-25 13:20:38,991 INFO L415 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:38,992 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 44 times [2018-07-25 13:20:38,992 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-07-25 13:20:39,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:39,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-25 13:20:39,374 INFO L451 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-25 13:20:39,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-25 13:20:39,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-25 13:20:39,375 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-07-25 13:20:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:39,656 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-07-25 13:20:39,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-25 13:20:39,656 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-07-25 13:20:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:39,659 INFO L225 Difference]: With dead ends: 449 [2018-07-25 13:20:39,659 INFO L226 Difference]: Without dead ends: 447 [2018-07-25 13:20:39,661 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-25 13:20:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-07-25 13:20:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-07-25 13:20:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-07-25 13:20:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-07-25 13:20:39,924 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-07-25 13:20:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:39,925 INFO L472 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-07-25 13:20:39,925 INFO L473 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-25 13:20:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-07-25 13:20:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-07-25 13:20:39,930 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:39,931 INFO L354 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-07-25 13:20:39,931 INFO L415 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:39,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 45 times [2018-07-25 13:20:39,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-07-25 13:20:40,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:40,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-25 13:20:40,306 INFO L451 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-25 13:20:40,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-25 13:20:40,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-25 13:20:40,307 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-07-25 13:20:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:40,627 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-07-25 13:20:40,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-25 13:20:40,628 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-07-25 13:20:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:40,631 INFO L225 Difference]: With dead ends: 461 [2018-07-25 13:20:40,631 INFO L226 Difference]: Without dead ends: 459 [2018-07-25 13:20:40,632 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-25 13:20:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-07-25 13:20:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-07-25 13:20:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-07-25 13:20:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-07-25 13:20:40,869 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-07-25 13:20:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:40,870 INFO L472 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-07-25 13:20:40,870 INFO L473 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-25 13:20:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-07-25 13:20:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-07-25 13:20:40,873 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:40,873 INFO L354 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-07-25 13:20:40,874 INFO L415 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 46 times [2018-07-25 13:20:40,874 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-07-25 13:20:41,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:41,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-25 13:20:41,240 INFO L451 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-25 13:20:41,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-25 13:20:41,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-25 13:20:41,241 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-07-25 13:20:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:41,558 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-07-25 13:20:41,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-25 13:20:41,558 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-07-25 13:20:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:41,562 INFO L225 Difference]: With dead ends: 473 [2018-07-25 13:20:41,562 INFO L226 Difference]: Without dead ends: 471 [2018-07-25 13:20:41,563 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-25 13:20:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-07-25 13:20:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-07-25 13:20:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-07-25 13:20:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-07-25 13:20:41,774 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-07-25 13:20:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:41,775 INFO L472 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-07-25 13:20:41,775 INFO L473 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-25 13:20:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-07-25 13:20:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-07-25 13:20:41,778 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:41,778 INFO L354 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-07-25 13:20:41,778 INFO L415 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 47 times [2018-07-25 13:20:41,779 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-07-25 13:20:42,149 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:42,149 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-25 13:20:42,149 INFO L451 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-25 13:20:42,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-25 13:20:42,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-25 13:20:42,151 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-07-25 13:20:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:42,418 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-07-25 13:20:42,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-25 13:20:42,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-07-25 13:20:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:42,421 INFO L225 Difference]: With dead ends: 485 [2018-07-25 13:20:42,422 INFO L226 Difference]: Without dead ends: 483 [2018-07-25 13:20:42,423 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-25 13:20:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-07-25 13:20:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-07-25 13:20:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-07-25 13:20:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-07-25 13:20:42,650 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-07-25 13:20:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:42,651 INFO L472 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-07-25 13:20:42,651 INFO L473 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-25 13:20:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-07-25 13:20:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-07-25 13:20:42,654 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:42,654 INFO L354 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-07-25 13:20:42,655 INFO L415 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 48 times [2018-07-25 13:20:42,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-07-25 13:20:43,222 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:43,222 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-25 13:20:43,223 INFO L451 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-25 13:20:43,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-25 13:20:43,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-25 13:20:43,224 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-07-25 13:20:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:43,545 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-07-25 13:20:43,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-25 13:20:43,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-07-25 13:20:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:43,548 INFO L225 Difference]: With dead ends: 497 [2018-07-25 13:20:43,549 INFO L226 Difference]: Without dead ends: 495 [2018-07-25 13:20:43,550 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-25 13:20:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-07-25 13:20:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-07-25 13:20:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-07-25 13:20:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-07-25 13:20:43,872 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-07-25 13:20:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:43,873 INFO L472 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-07-25 13:20:43,873 INFO L473 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-25 13:20:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-07-25 13:20:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-07-25 13:20:43,877 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:43,877 INFO L354 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-07-25 13:20:43,878 INFO L415 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 49 times [2018-07-25 13:20:43,878 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-07-25 13:20:44,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:44,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-25 13:20:44,325 INFO L451 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-25 13:20:44,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-25 13:20:44,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-25 13:20:44,326 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-07-25 13:20:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:44,630 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-07-25 13:20:44,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-25 13:20:44,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-07-25 13:20:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:44,634 INFO L225 Difference]: With dead ends: 509 [2018-07-25 13:20:44,634 INFO L226 Difference]: Without dead ends: 507 [2018-07-25 13:20:44,635 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-25 13:20:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-07-25 13:20:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-07-25 13:20:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-07-25 13:20:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-07-25 13:20:44,904 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-07-25 13:20:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:44,904 INFO L472 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-07-25 13:20:44,904 INFO L473 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-25 13:20:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-07-25 13:20:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-07-25 13:20:44,907 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:44,908 INFO L354 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-07-25 13:20:44,908 INFO L415 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 50 times [2018-07-25 13:20:44,909 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-07-25 13:20:45,323 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:45,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-25 13:20:45,323 INFO L451 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-25 13:20:45,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-25 13:20:45,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-25 13:20:45,325 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-07-25 13:20:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:45,607 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-07-25 13:20:45,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-25 13:20:45,607 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-07-25 13:20:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:45,610 INFO L225 Difference]: With dead ends: 521 [2018-07-25 13:20:45,610 INFO L226 Difference]: Without dead ends: 519 [2018-07-25 13:20:45,611 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-25 13:20:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-07-25 13:20:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-07-25 13:20:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-07-25 13:20:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-07-25 13:20:45,854 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-07-25 13:20:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:45,855 INFO L472 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-07-25 13:20:45,855 INFO L473 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-25 13:20:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-07-25 13:20:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-07-25 13:20:45,857 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:45,857 INFO L354 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-07-25 13:20:45,858 INFO L415 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 51 times [2018-07-25 13:20:45,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-07-25 13:20:46,378 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:46,378 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-25 13:20:46,378 INFO L451 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-25 13:20:46,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-25 13:20:46,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 13:20:46,379 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-07-25 13:20:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:46,779 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-07-25 13:20:46,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-25 13:20:46,779 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-07-25 13:20:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:46,781 INFO L225 Difference]: With dead ends: 533 [2018-07-25 13:20:46,781 INFO L226 Difference]: Without dead ends: 531 [2018-07-25 13:20:46,781 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 13:20:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-07-25 13:20:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-07-25 13:20:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-07-25 13:20:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-07-25 13:20:47,039 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-07-25 13:20:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:47,040 INFO L472 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-07-25 13:20:47,040 INFO L473 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-25 13:20:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-07-25 13:20:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-07-25 13:20:47,043 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:47,043 INFO L354 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-07-25 13:20:47,043 INFO L415 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 52 times [2018-07-25 13:20:47,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-07-25 13:20:47,548 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:47,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-25 13:20:47,549 INFO L451 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-25 13:20:47,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-25 13:20:47,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-25 13:20:47,550 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-07-25 13:20:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:47,910 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-07-25 13:20:47,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-25 13:20:47,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-07-25 13:20:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:47,913 INFO L225 Difference]: With dead ends: 545 [2018-07-25 13:20:47,913 INFO L226 Difference]: Without dead ends: 543 [2018-07-25 13:20:47,913 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-25 13:20:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-07-25 13:20:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-07-25 13:20:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-25 13:20:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-07-25 13:20:48,168 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-07-25 13:20:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:48,168 INFO L472 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-07-25 13:20:48,168 INFO L473 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-25 13:20:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-07-25 13:20:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-07-25 13:20:48,172 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:48,172 INFO L354 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-07-25 13:20:48,172 INFO L415 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 53 times [2018-07-25 13:20:48,173 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-07-25 13:20:48,678 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:48,678 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-25 13:20:48,678 INFO L451 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-25 13:20:48,679 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-25 13:20:48,679 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-25 13:20:48,679 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-07-25 13:20:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:49,038 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-07-25 13:20:49,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-25 13:20:49,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-07-25 13:20:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:49,041 INFO L225 Difference]: With dead ends: 557 [2018-07-25 13:20:49,041 INFO L226 Difference]: Without dead ends: 555 [2018-07-25 13:20:49,042 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-25 13:20:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-07-25 13:20:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-07-25 13:20:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-07-25 13:20:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-07-25 13:20:49,329 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-07-25 13:20:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:49,329 INFO L472 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-07-25 13:20:49,329 INFO L473 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-25 13:20:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-07-25 13:20:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-07-25 13:20:49,333 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:49,333 INFO L354 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-07-25 13:20:49,333 INFO L415 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 54 times [2018-07-25 13:20:49,334 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-07-25 13:20:49,751 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:49,751 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-25 13:20:49,752 INFO L451 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-25 13:20:49,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-25 13:20:49,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-25 13:20:49,752 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-07-25 13:20:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:50,046 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-07-25 13:20:50,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-25 13:20:50,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-07-25 13:20:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:50,049 INFO L225 Difference]: With dead ends: 569 [2018-07-25 13:20:50,050 INFO L226 Difference]: Without dead ends: 567 [2018-07-25 13:20:50,050 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-25 13:20:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-07-25 13:20:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-07-25 13:20:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-07-25 13:20:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-07-25 13:20:50,351 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-07-25 13:20:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:50,352 INFO L472 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-07-25 13:20:50,352 INFO L473 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-25 13:20:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-07-25 13:20:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-07-25 13:20:50,355 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:50,356 INFO L354 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-07-25 13:20:50,356 INFO L415 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 55 times [2018-07-25 13:20:50,356 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-07-25 13:20:50,929 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:50,929 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-25 13:20:50,930 INFO L451 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-25 13:20:50,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-25 13:20:50,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-25 13:20:50,931 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-07-25 13:20:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:51,331 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-07-25 13:20:51,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-25 13:20:51,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-07-25 13:20:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:51,334 INFO L225 Difference]: With dead ends: 581 [2018-07-25 13:20:51,334 INFO L226 Difference]: Without dead ends: 579 [2018-07-25 13:20:51,335 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-25 13:20:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-07-25 13:20:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-07-25 13:20:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-07-25 13:20:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-07-25 13:20:51,627 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-07-25 13:20:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:51,627 INFO L472 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-07-25 13:20:51,627 INFO L473 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-25 13:20:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-07-25 13:20:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-07-25 13:20:51,630 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:51,630 INFO L354 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-07-25 13:20:51,630 INFO L415 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 56 times [2018-07-25 13:20:51,630 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-07-25 13:20:52,095 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:52,095 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-25 13:20:52,095 INFO L451 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-25 13:20:52,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-25 13:20:52,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-25 13:20:52,096 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-07-25 13:20:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:52,430 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-07-25 13:20:52,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-25 13:20:52,431 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-07-25 13:20:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:52,433 INFO L225 Difference]: With dead ends: 593 [2018-07-25 13:20:52,433 INFO L226 Difference]: Without dead ends: 591 [2018-07-25 13:20:52,433 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-25 13:20:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-07-25 13:20:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-07-25 13:20:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-07-25 13:20:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-07-25 13:20:52,705 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-07-25 13:20:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:52,705 INFO L472 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-07-25 13:20:52,705 INFO L473 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-25 13:20:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-07-25 13:20:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-07-25 13:20:52,708 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:52,708 INFO L354 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-07-25 13:20:52,708 INFO L415 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 57 times [2018-07-25 13:20:52,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-07-25 13:20:53,105 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:53,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-25 13:20:53,106 INFO L451 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-25 13:20:53,106 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-25 13:20:53,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-25 13:20:53,107 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-07-25 13:20:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:53,501 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-07-25 13:20:53,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-25 13:20:53,501 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-07-25 13:20:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:53,504 INFO L225 Difference]: With dead ends: 605 [2018-07-25 13:20:53,504 INFO L226 Difference]: Without dead ends: 603 [2018-07-25 13:20:53,505 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-25 13:20:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-07-25 13:20:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-07-25 13:20:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-07-25 13:20:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-07-25 13:20:53,877 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-07-25 13:20:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:53,877 INFO L472 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-07-25 13:20:53,877 INFO L473 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-25 13:20:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-07-25 13:20:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-07-25 13:20:53,881 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:53,881 INFO L354 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-07-25 13:20:53,881 INFO L415 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 58 times [2018-07-25 13:20:53,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-07-25 13:20:54,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:54,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-25 13:20:54,409 INFO L451 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-25 13:20:54,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-25 13:20:54,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-25 13:20:54,410 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-07-25 13:20:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:54,873 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-07-25 13:20:54,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-25 13:20:54,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-07-25 13:20:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:54,876 INFO L225 Difference]: With dead ends: 617 [2018-07-25 13:20:54,876 INFO L226 Difference]: Without dead ends: 615 [2018-07-25 13:20:54,876 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-25 13:20:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-07-25 13:20:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-07-25 13:20:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-07-25 13:20:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-07-25 13:20:55,285 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-07-25 13:20:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:55,285 INFO L472 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-07-25 13:20:55,285 INFO L473 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-25 13:20:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-07-25 13:20:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-07-25 13:20:55,289 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:55,289 INFO L354 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-07-25 13:20:55,290 INFO L415 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 59 times [2018-07-25 13:20:55,290 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-07-25 13:20:55,736 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:55,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-25 13:20:55,737 INFO L451 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-25 13:20:55,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-25 13:20:55,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-25 13:20:55,737 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-07-25 13:20:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:56,118 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-07-25 13:20:56,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-25 13:20:56,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-07-25 13:20:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:56,121 INFO L225 Difference]: With dead ends: 629 [2018-07-25 13:20:56,121 INFO L226 Difference]: Without dead ends: 627 [2018-07-25 13:20:56,122 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-25 13:20:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-07-25 13:20:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-07-25 13:20:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-07-25 13:20:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-07-25 13:20:56,462 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-07-25 13:20:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:56,463 INFO L472 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-07-25 13:20:56,463 INFO L473 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-25 13:20:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-07-25 13:20:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-07-25 13:20:56,467 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:56,468 INFO L354 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-07-25 13:20:56,468 INFO L415 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 60 times [2018-07-25 13:20:56,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-07-25 13:20:56,942 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:56,942 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-25 13:20:56,943 INFO L451 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-25 13:20:56,943 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-25 13:20:56,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-25 13:20:56,944 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-07-25 13:20:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:57,325 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-07-25 13:20:57,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-25 13:20:57,325 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-07-25 13:20:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:57,328 INFO L225 Difference]: With dead ends: 641 [2018-07-25 13:20:57,328 INFO L226 Difference]: Without dead ends: 639 [2018-07-25 13:20:57,329 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-25 13:20:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-07-25 13:20:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-07-25 13:20:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-07-25 13:20:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-07-25 13:20:57,703 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-07-25 13:20:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:57,703 INFO L472 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-07-25 13:20:57,704 INFO L473 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-25 13:20:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-07-25 13:20:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-07-25 13:20:57,708 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:57,708 INFO L354 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-07-25 13:20:57,709 INFO L415 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 61 times [2018-07-25 13:20:57,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-07-25 13:20:58,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:58,290 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-25 13:20:58,290 INFO L451 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-25 13:20:58,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-25 13:20:58,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-25 13:20:58,291 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-07-25 13:20:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:58,708 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-07-25 13:20:58,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-25 13:20:58,708 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-07-25 13:20:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:58,712 INFO L225 Difference]: With dead ends: 653 [2018-07-25 13:20:58,712 INFO L226 Difference]: Without dead ends: 651 [2018-07-25 13:20:58,713 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-25 13:20:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-07-25 13:20:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-07-25 13:20:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-07-25 13:20:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-07-25 13:20:59,094 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-07-25 13:20:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:20:59,095 INFO L472 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-07-25 13:20:59,095 INFO L473 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-25 13:20:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-07-25 13:20:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-07-25 13:20:59,102 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:20:59,102 INFO L354 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-07-25 13:20:59,102 INFO L415 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:20:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 62 times [2018-07-25 13:20:59,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:20:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:20:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-07-25 13:20:59,537 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:20:59,537 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-25 13:20:59,538 INFO L451 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-25 13:20:59,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-25 13:20:59,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-25 13:20:59,539 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-07-25 13:20:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:20:59,928 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-07-25 13:20:59,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-25 13:20:59,928 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-07-25 13:20:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:20:59,931 INFO L225 Difference]: With dead ends: 665 [2018-07-25 13:20:59,931 INFO L226 Difference]: Without dead ends: 663 [2018-07-25 13:20:59,932 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-25 13:20:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-07-25 13:21:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-07-25 13:21:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-07-25 13:21:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-07-25 13:21:00,319 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-07-25 13:21:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:00,320 INFO L472 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-07-25 13:21:00,320 INFO L473 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-25 13:21:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-07-25 13:21:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-07-25 13:21:00,326 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:00,326 INFO L354 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-07-25 13:21:00,326 INFO L415 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 63 times [2018-07-25 13:21:00,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-07-25 13:21:00,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:00,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-25 13:21:00,937 INFO L451 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-25 13:21:00,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-25 13:21:00,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-25 13:21:00,938 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-07-25 13:21:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:01,360 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-07-25 13:21:01,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-25 13:21:01,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-07-25 13:21:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:01,363 INFO L225 Difference]: With dead ends: 677 [2018-07-25 13:21:01,363 INFO L226 Difference]: Without dead ends: 675 [2018-07-25 13:21:01,363 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-25 13:21:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-07-25 13:21:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-07-25 13:21:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-07-25 13:21:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-07-25 13:21:01,744 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-07-25 13:21:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:01,745 INFO L472 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-07-25 13:21:01,745 INFO L473 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-25 13:21:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-07-25 13:21:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-07-25 13:21:01,750 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:01,750 INFO L354 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-07-25 13:21:01,750 INFO L415 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 64 times [2018-07-25 13:21:01,751 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-07-25 13:21:02,218 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:02,218 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-25 13:21:02,218 INFO L451 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-25 13:21:02,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-25 13:21:02,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-25 13:21:02,219 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-07-25 13:21:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:02,654 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-07-25 13:21:02,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-25 13:21:02,654 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-07-25 13:21:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:02,657 INFO L225 Difference]: With dead ends: 689 [2018-07-25 13:21:02,657 INFO L226 Difference]: Without dead ends: 687 [2018-07-25 13:21:02,657 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-25 13:21:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-07-25 13:21:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-07-25 13:21:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-07-25 13:21:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-07-25 13:21:03,122 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-07-25 13:21:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:03,123 INFO L472 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-07-25 13:21:03,123 INFO L473 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-25 13:21:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-07-25 13:21:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-07-25 13:21:03,128 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:03,128 INFO L354 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-07-25 13:21:03,128 INFO L415 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 65 times [2018-07-25 13:21:03,129 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-07-25 13:21:03,642 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:03,642 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-25 13:21:03,643 INFO L451 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-25 13:21:03,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-25 13:21:03,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-25 13:21:03,643 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-07-25 13:21:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:04,077 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-07-25 13:21:04,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-25 13:21:04,078 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-07-25 13:21:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:04,080 INFO L225 Difference]: With dead ends: 701 [2018-07-25 13:21:04,080 INFO L226 Difference]: Without dead ends: 699 [2018-07-25 13:21:04,080 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-25 13:21:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-07-25 13:21:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-07-25 13:21:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-07-25 13:21:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-07-25 13:21:04,488 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-07-25 13:21:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:04,489 INFO L472 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-07-25 13:21:04,489 INFO L473 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-25 13:21:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-07-25 13:21:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-07-25 13:21:04,493 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:04,493 INFO L354 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-07-25 13:21:04,493 INFO L415 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 66 times [2018-07-25 13:21:04,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-07-25 13:21:04,984 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:04,984 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-25 13:21:04,985 INFO L451 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-25 13:21:04,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-25 13:21:04,986 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-25 13:21:04,986 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-07-25 13:21:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:05,510 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-07-25 13:21:05,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-25 13:21:05,510 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-07-25 13:21:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:05,514 INFO L225 Difference]: With dead ends: 713 [2018-07-25 13:21:05,514 INFO L226 Difference]: Without dead ends: 711 [2018-07-25 13:21:05,515 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-25 13:21:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-07-25 13:21:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-07-25 13:21:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-07-25 13:21:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-07-25 13:21:05,967 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-07-25 13:21:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:05,967 INFO L472 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-07-25 13:21:05,967 INFO L473 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-25 13:21:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-07-25 13:21:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-07-25 13:21:05,972 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:05,972 INFO L354 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-07-25 13:21:05,973 INFO L415 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 67 times [2018-07-25 13:21:05,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-07-25 13:21:06,634 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:06,634 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-25 13:21:06,635 INFO L451 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-25 13:21:06,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-25 13:21:06,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-25 13:21:06,636 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-07-25 13:21:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:07,112 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-07-25 13:21:07,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-25 13:21:07,112 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-07-25 13:21:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:07,115 INFO L225 Difference]: With dead ends: 725 [2018-07-25 13:21:07,115 INFO L226 Difference]: Without dead ends: 723 [2018-07-25 13:21:07,115 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-25 13:21:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-07-25 13:21:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-07-25 13:21:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-07-25 13:21:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-07-25 13:21:07,545 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-07-25 13:21:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:07,545 INFO L472 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-07-25 13:21:07,545 INFO L473 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-25 13:21:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-07-25 13:21:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-07-25 13:21:07,549 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:07,549 INFO L354 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-07-25 13:21:07,549 INFO L415 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 68 times [2018-07-25 13:21:07,550 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-07-25 13:21:08,069 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:08,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-25 13:21:08,070 INFO L451 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-25 13:21:08,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-25 13:21:08,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-25 13:21:08,070 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-07-25 13:21:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:08,849 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-07-25 13:21:08,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-25 13:21:08,849 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-07-25 13:21:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:08,852 INFO L225 Difference]: With dead ends: 737 [2018-07-25 13:21:08,852 INFO L226 Difference]: Without dead ends: 735 [2018-07-25 13:21:08,852 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-25 13:21:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-07-25 13:21:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-07-25 13:21:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-07-25 13:21:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-07-25 13:21:09,298 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-07-25 13:21:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:09,298 INFO L472 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-07-25 13:21:09,299 INFO L473 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-25 13:21:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-07-25 13:21:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-07-25 13:21:09,302 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:09,302 INFO L354 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-07-25 13:21:09,302 INFO L415 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 69 times [2018-07-25 13:21:09,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-07-25 13:21:09,870 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:09,870 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-25 13:21:09,871 INFO L451 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-25 13:21:09,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-25 13:21:09,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-25 13:21:09,872 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-07-25 13:21:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:10,373 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-07-25 13:21:10,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-25 13:21:10,374 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-07-25 13:21:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:10,376 INFO L225 Difference]: With dead ends: 749 [2018-07-25 13:21:10,376 INFO L226 Difference]: Without dead ends: 747 [2018-07-25 13:21:10,377 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-25 13:21:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-07-25 13:21:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-07-25 13:21:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-07-25 13:21:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-07-25 13:21:10,853 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-07-25 13:21:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:10,854 INFO L472 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-07-25 13:21:10,854 INFO L473 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-25 13:21:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-07-25 13:21:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-07-25 13:21:10,857 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:10,858 INFO L354 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-07-25 13:21:10,858 INFO L415 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 70 times [2018-07-25 13:21:10,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-07-25 13:21:11,420 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:11,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-25 13:21:11,421 INFO L451 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-25 13:21:11,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-25 13:21:11,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-25 13:21:11,422 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-07-25 13:21:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:11,983 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-07-25 13:21:11,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-25 13:21:11,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-07-25 13:21:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:11,986 INFO L225 Difference]: With dead ends: 761 [2018-07-25 13:21:11,986 INFO L226 Difference]: Without dead ends: 759 [2018-07-25 13:21:11,987 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-25 13:21:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-07-25 13:21:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-07-25 13:21:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-07-25 13:21:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-07-25 13:21:12,468 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-07-25 13:21:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:12,469 INFO L472 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-07-25 13:21:12,469 INFO L473 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-25 13:21:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-07-25 13:21:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-07-25 13:21:12,472 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:12,473 INFO L354 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-07-25 13:21:12,473 INFO L415 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 71 times [2018-07-25 13:21:12,473 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-07-25 13:21:13,081 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:13,081 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-25 13:21:13,082 INFO L451 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-25 13:21:13,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-25 13:21:13,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-25 13:21:13,083 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-07-25 13:21:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:13,646 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-07-25 13:21:13,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-25 13:21:13,646 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-07-25 13:21:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:13,649 INFO L225 Difference]: With dead ends: 773 [2018-07-25 13:21:13,649 INFO L226 Difference]: Without dead ends: 771 [2018-07-25 13:21:13,649 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-25 13:21:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-07-25 13:21:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-07-25 13:21:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-07-25 13:21:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-07-25 13:21:14,142 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-07-25 13:21:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:14,143 INFO L472 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-07-25 13:21:14,143 INFO L473 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-25 13:21:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-07-25 13:21:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-07-25 13:21:14,147 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:14,147 INFO L354 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-07-25 13:21:14,148 INFO L415 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 72 times [2018-07-25 13:21:14,148 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-07-25 13:21:14,723 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:14,723 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-25 13:21:14,724 INFO L451 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-25 13:21:14,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-25 13:21:14,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-25 13:21:14,725 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-07-25 13:21:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:15,359 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-07-25 13:21:15,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-25 13:21:15,360 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-07-25 13:21:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:15,363 INFO L225 Difference]: With dead ends: 785 [2018-07-25 13:21:15,363 INFO L226 Difference]: Without dead ends: 783 [2018-07-25 13:21:15,364 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-25 13:21:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-07-25 13:21:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-07-25 13:21:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-07-25 13:21:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-07-25 13:21:15,880 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-07-25 13:21:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:15,881 INFO L472 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-07-25 13:21:15,881 INFO L473 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-25 13:21:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-07-25 13:21:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-07-25 13:21:15,885 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:15,885 INFO L354 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-07-25 13:21:15,885 INFO L415 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 73 times [2018-07-25 13:21:15,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-07-25 13:21:16,520 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:16,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-25 13:21:16,521 INFO L451 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-25 13:21:16,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-25 13:21:16,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-25 13:21:16,521 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-07-25 13:21:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:17,109 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-07-25 13:21:17,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-25 13:21:17,109 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-07-25 13:21:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:17,112 INFO L225 Difference]: With dead ends: 797 [2018-07-25 13:21:17,112 INFO L226 Difference]: Without dead ends: 795 [2018-07-25 13:21:17,113 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-25 13:21:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-07-25 13:21:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-07-25 13:21:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-07-25 13:21:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-07-25 13:21:17,643 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-07-25 13:21:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:17,644 INFO L472 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-07-25 13:21:17,644 INFO L473 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-25 13:21:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-07-25 13:21:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-07-25 13:21:17,648 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:17,648 INFO L354 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-07-25 13:21:17,648 INFO L415 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:17,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 74 times [2018-07-25 13:21:17,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-07-25 13:21:18,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:18,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-25 13:21:18,250 INFO L451 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-25 13:21:18,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-25 13:21:18,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-25 13:21:18,251 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-07-25 13:21:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:18,890 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-07-25 13:21:18,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-25 13:21:18,890 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-07-25 13:21:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:18,892 INFO L225 Difference]: With dead ends: 809 [2018-07-25 13:21:18,893 INFO L226 Difference]: Without dead ends: 807 [2018-07-25 13:21:18,893 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-25 13:21:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-07-25 13:21:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-07-25 13:21:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-07-25 13:21:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-07-25 13:21:19,447 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-07-25 13:21:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:19,448 INFO L472 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-07-25 13:21:19,448 INFO L473 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-25 13:21:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-07-25 13:21:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-07-25 13:21:19,452 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:19,452 INFO L354 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-07-25 13:21:19,452 INFO L415 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 75 times [2018-07-25 13:21:19,453 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-07-25 13:21:20,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:20,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-25 13:21:20,156 INFO L451 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-25 13:21:20,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-25 13:21:20,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-25 13:21:20,157 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-07-25 13:21:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:20,806 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-07-25 13:21:20,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-25 13:21:20,806 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-07-25 13:21:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:20,809 INFO L225 Difference]: With dead ends: 821 [2018-07-25 13:21:20,809 INFO L226 Difference]: Without dead ends: 819 [2018-07-25 13:21:20,810 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-25 13:21:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-07-25 13:21:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-07-25 13:21:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-07-25 13:21:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-07-25 13:21:21,392 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-07-25 13:21:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:21,393 INFO L472 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-07-25 13:21:21,393 INFO L473 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-25 13:21:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-07-25 13:21:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-07-25 13:21:21,397 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:21,397 INFO L354 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-07-25 13:21:21,398 INFO L415 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 76 times [2018-07-25 13:21:21,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-07-25 13:21:22,147 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:22,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-25 13:21:22,148 INFO L451 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-25 13:21:22,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-25 13:21:22,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-25 13:21:22,149 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-07-25 13:21:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:22,828 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-07-25 13:21:22,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-25 13:21:22,828 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-07-25 13:21:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:22,832 INFO L225 Difference]: With dead ends: 833 [2018-07-25 13:21:22,832 INFO L226 Difference]: Without dead ends: 831 [2018-07-25 13:21:22,833 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-25 13:21:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-07-25 13:21:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-07-25 13:21:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-07-25 13:21:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-07-25 13:21:23,465 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-07-25 13:21:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:23,465 INFO L472 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-07-25 13:21:23,465 INFO L473 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-25 13:21:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-07-25 13:21:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-07-25 13:21:23,471 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:23,471 INFO L354 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-07-25 13:21:23,472 INFO L415 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 77 times [2018-07-25 13:21:23,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-07-25 13:21:24,186 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:24,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-25 13:21:24,187 INFO L451 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-25 13:21:24,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-25 13:21:24,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-25 13:21:24,188 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-07-25 13:21:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:24,896 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-07-25 13:21:24,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-25 13:21:24,897 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-07-25 13:21:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:24,900 INFO L225 Difference]: With dead ends: 845 [2018-07-25 13:21:24,900 INFO L226 Difference]: Without dead ends: 843 [2018-07-25 13:21:24,901 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-25 13:21:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-07-25 13:21:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-07-25 13:21:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-07-25 13:21:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-07-25 13:21:25,512 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-07-25 13:21:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:25,513 INFO L472 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-07-25 13:21:25,513 INFO L473 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-25 13:21:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-07-25 13:21:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-07-25 13:21:25,517 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:25,518 INFO L354 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-07-25 13:21:25,518 INFO L415 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 78 times [2018-07-25 13:21:25,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-07-25 13:21:26,243 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:26,243 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-25 13:21:26,244 INFO L451 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-25 13:21:26,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-25 13:21:26,244 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-25 13:21:26,245 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-07-25 13:21:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:26,924 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-07-25 13:21:26,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-25 13:21:26,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-07-25 13:21:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:26,926 INFO L225 Difference]: With dead ends: 857 [2018-07-25 13:21:26,926 INFO L226 Difference]: Without dead ends: 855 [2018-07-25 13:21:26,927 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-25 13:21:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-07-25 13:21:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-07-25 13:21:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-07-25 13:21:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-07-25 13:21:27,556 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-07-25 13:21:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:27,556 INFO L472 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-07-25 13:21:27,556 INFO L473 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-25 13:21:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-07-25 13:21:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-07-25 13:21:27,561 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:27,561 INFO L354 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-07-25 13:21:27,562 INFO L415 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:27,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 79 times [2018-07-25 13:21:27,562 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-07-25 13:21:28,254 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:28,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-25 13:21:28,255 INFO L451 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-25 13:21:28,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-25 13:21:28,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-25 13:21:28,256 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-07-25 13:21:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:29,017 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-07-25 13:21:29,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-25 13:21:29,017 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-07-25 13:21:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:29,019 INFO L225 Difference]: With dead ends: 869 [2018-07-25 13:21:29,019 INFO L226 Difference]: Without dead ends: 867 [2018-07-25 13:21:29,020 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-25 13:21:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-07-25 13:21:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-07-25 13:21:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-07-25 13:21:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-07-25 13:21:29,675 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-07-25 13:21:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:29,676 INFO L472 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-07-25 13:21:29,676 INFO L473 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-25 13:21:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-07-25 13:21:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-07-25 13:21:29,681 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:29,681 INFO L354 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-07-25 13:21:29,681 INFO L415 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 80 times [2018-07-25 13:21:29,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-07-25 13:21:30,391 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:30,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-25 13:21:30,392 INFO L451 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-25 13:21:30,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-25 13:21:30,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-25 13:21:30,393 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-07-25 13:21:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:31,133 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-07-25 13:21:31,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-25 13:21:31,133 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-07-25 13:21:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:31,136 INFO L225 Difference]: With dead ends: 881 [2018-07-25 13:21:31,136 INFO L226 Difference]: Without dead ends: 879 [2018-07-25 13:21:31,137 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-25 13:21:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-07-25 13:21:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-07-25 13:21:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-07-25 13:21:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-07-25 13:21:31,818 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-07-25 13:21:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:31,818 INFO L472 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-07-25 13:21:31,818 INFO L473 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-25 13:21:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-07-25 13:21:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-07-25 13:21:31,823 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:31,824 INFO L354 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-07-25 13:21:31,824 INFO L415 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 81 times [2018-07-25 13:21:31,824 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-07-25 13:21:32,623 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:32,623 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-25 13:21:32,623 INFO L451 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-25 13:21:32,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-25 13:21:32,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-25 13:21:32,624 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-07-25 13:21:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:33,391 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-07-25 13:21:33,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-25 13:21:33,391 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-07-25 13:21:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:33,393 INFO L225 Difference]: With dead ends: 893 [2018-07-25 13:21:33,393 INFO L226 Difference]: Without dead ends: 891 [2018-07-25 13:21:33,393 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-25 13:21:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-07-25 13:21:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-07-25 13:21:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-07-25 13:21:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-07-25 13:21:34,083 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-07-25 13:21:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:34,084 INFO L472 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-07-25 13:21:34,084 INFO L473 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-25 13:21:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-07-25 13:21:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-07-25 13:21:34,089 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:34,089 INFO L354 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-07-25 13:21:34,089 INFO L415 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 82 times [2018-07-25 13:21:34,090 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-07-25 13:21:34,868 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:34,868 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-25 13:21:34,869 INFO L451 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-25 13:21:34,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-25 13:21:34,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-25 13:21:34,870 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-07-25 13:21:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:35,622 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-07-25 13:21:35,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-25 13:21:35,623 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-07-25 13:21:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:35,624 INFO L225 Difference]: With dead ends: 905 [2018-07-25 13:21:35,624 INFO L226 Difference]: Without dead ends: 903 [2018-07-25 13:21:35,625 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-25 13:21:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-07-25 13:21:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-07-25 13:21:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-07-25 13:21:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-07-25 13:21:36,335 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-07-25 13:21:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:36,335 INFO L472 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-07-25 13:21:36,335 INFO L473 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-25 13:21:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-07-25 13:21:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-07-25 13:21:36,340 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:36,340 INFO L354 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-07-25 13:21:36,340 INFO L415 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 83 times [2018-07-25 13:21:36,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-07-25 13:21:37,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:37,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-25 13:21:37,103 INFO L451 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-25 13:21:37,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-25 13:21:37,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-25 13:21:37,104 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-07-25 13:21:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:37,990 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-07-25 13:21:37,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-25 13:21:37,991 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-07-25 13:21:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:37,992 INFO L225 Difference]: With dead ends: 917 [2018-07-25 13:21:37,992 INFO L226 Difference]: Without dead ends: 915 [2018-07-25 13:21:37,992 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-25 13:21:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-07-25 13:21:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-07-25 13:21:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-07-25 13:21:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-07-25 13:21:38,724 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-07-25 13:21:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:38,725 INFO L472 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-07-25 13:21:38,725 INFO L473 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-25 13:21:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-07-25 13:21:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-07-25 13:21:38,733 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:38,733 INFO L354 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-07-25 13:21:38,734 INFO L415 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 84 times [2018-07-25 13:21:38,734 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-07-25 13:21:39,526 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:39,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-25 13:21:39,527 INFO L451 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-25 13:21:39,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-25 13:21:39,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-25 13:21:39,529 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-07-25 13:21:40,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:40,378 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-07-25 13:21:40,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-25 13:21:40,379 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-07-25 13:21:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:40,381 INFO L225 Difference]: With dead ends: 929 [2018-07-25 13:21:40,381 INFO L226 Difference]: Without dead ends: 927 [2018-07-25 13:21:40,382 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-25 13:21:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-07-25 13:21:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-07-25 13:21:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-07-25 13:21:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-07-25 13:21:41,135 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-07-25 13:21:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:41,136 INFO L472 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-07-25 13:21:41,136 INFO L473 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-25 13:21:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-07-25 13:21:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-07-25 13:21:41,143 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:41,144 INFO L354 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-07-25 13:21:41,144 INFO L415 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 85 times [2018-07-25 13:21:41,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-07-25 13:21:42,049 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:42,050 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-25 13:21:42,050 INFO L451 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-25 13:21:42,051 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-25 13:21:42,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-25 13:21:42,051 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. [2018-07-25 13:21:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:42,909 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2018-07-25 13:21:42,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-25 13:21:42,909 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 915 [2018-07-25 13:21:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:42,911 INFO L225 Difference]: With dead ends: 941 [2018-07-25 13:21:42,911 INFO L226 Difference]: Without dead ends: 939 [2018-07-25 13:21:42,912 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-25 13:21:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-07-25 13:21:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2018-07-25 13:21:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2018-07-25 13:21:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1005 transitions. [2018-07-25 13:21:43,694 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1005 transitions. Word has length 915 [2018-07-25 13:21:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:43,694 INFO L472 AbstractCegarLoop]: Abstraction has 928 states and 1005 transitions. [2018-07-25 13:21:43,694 INFO L473 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-25 13:21:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1005 transitions. [2018-07-25 13:21:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-07-25 13:21:43,700 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:43,700 INFO L354 BasicCegarLoop]: trace histogram [770, 77, 77, 1, 1, 1] [2018-07-25 13:21:43,700 INFO L415 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash 345957445, now seen corresponding path program 86 times [2018-07-25 13:21:43,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 361284 backedges. 0 proven. 357049 refuted. 0 times theorem prover too weak. 4235 trivial. 0 not checked. [2018-07-25 13:21:44,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:44,590 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-25 13:21:44,591 INFO L451 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-25 13:21:44,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-25 13:21:44,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-25 13:21:44,591 INFO L87 Difference]: Start difference. First operand 928 states and 1005 transitions. Second operand 80 states. [2018-07-25 13:21:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:45,444 INFO L93 Difference]: Finished difference Result 953 states and 1032 transitions. [2018-07-25 13:21:45,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-25 13:21:45,444 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 927 [2018-07-25 13:21:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:45,446 INFO L225 Difference]: With dead ends: 953 [2018-07-25 13:21:45,446 INFO L226 Difference]: Without dead ends: 951 [2018-07-25 13:21:45,447 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-25 13:21:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2018-07-25 13:21:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 940. [2018-07-25 13:21:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2018-07-25 13:21:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1018 transitions. [2018-07-25 13:21:46,259 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1018 transitions. Word has length 927 [2018-07-25 13:21:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:46,260 INFO L472 AbstractCegarLoop]: Abstraction has 940 states and 1018 transitions. [2018-07-25 13:21:46,260 INFO L473 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-25 13:21:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1018 transitions. [2018-07-25 13:21:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2018-07-25 13:21:46,265 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:46,265 INFO L354 BasicCegarLoop]: trace histogram [780, 78, 78, 1, 1, 1] [2018-07-25 13:21:46,265 INFO L415 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash -456595313, now seen corresponding path program 87 times [2018-07-25 13:21:46,266 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 370734 backedges. 0 proven. 366444 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-07-25 13:21:47,157 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:47,157 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-25 13:21:47,158 INFO L451 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-25 13:21:47,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-25 13:21:47,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-25 13:21:47,158 INFO L87 Difference]: Start difference. First operand 940 states and 1018 transitions. Second operand 81 states. [2018-07-25 13:21:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:48,077 INFO L93 Difference]: Finished difference Result 965 states and 1045 transitions. [2018-07-25 13:21:48,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-25 13:21:48,078 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 939 [2018-07-25 13:21:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:48,079 INFO L225 Difference]: With dead ends: 965 [2018-07-25 13:21:48,080 INFO L226 Difference]: Without dead ends: 963 [2018-07-25 13:21:48,080 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-25 13:21:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-07-25 13:21:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 952. [2018-07-25 13:21:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-07-25 13:21:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1031 transitions. [2018-07-25 13:21:49,002 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1031 transitions. Word has length 939 [2018-07-25 13:21:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:49,002 INFO L472 AbstractCegarLoop]: Abstraction has 952 states and 1031 transitions. [2018-07-25 13:21:49,003 INFO L473 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-25 13:21:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1031 transitions. [2018-07-25 13:21:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2018-07-25 13:21:49,008 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:49,008 INFO L354 BasicCegarLoop]: trace histogram [790, 79, 79, 1, 1, 1] [2018-07-25 13:21:49,009 INFO L415 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1007890983, now seen corresponding path program 88 times [2018-07-25 13:21:49,009 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 380306 backedges. 0 proven. 375961 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2018-07-25 13:21:49,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:49,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-25 13:21:49,937 INFO L451 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-25 13:21:49,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-25 13:21:49,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-25 13:21:49,938 INFO L87 Difference]: Start difference. First operand 952 states and 1031 transitions. Second operand 82 states. [2018-07-25 13:21:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:50,876 INFO L93 Difference]: Finished difference Result 977 states and 1058 transitions. [2018-07-25 13:21:50,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-25 13:21:50,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 951 [2018-07-25 13:21:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:50,879 INFO L225 Difference]: With dead ends: 977 [2018-07-25 13:21:50,879 INFO L226 Difference]: Without dead ends: 975 [2018-07-25 13:21:50,879 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-25 13:21:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-07-25 13:21:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 964. [2018-07-25 13:21:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-07-25 13:21:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1044 transitions. [2018-07-25 13:21:51,818 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1044 transitions. Word has length 951 [2018-07-25 13:21:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:51,818 INFO L472 AbstractCegarLoop]: Abstraction has 964 states and 1044 transitions. [2018-07-25 13:21:51,818 INFO L473 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-25 13:21:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1044 transitions. [2018-07-25 13:21:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-07-25 13:21:51,824 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:51,824 INFO L354 BasicCegarLoop]: trace histogram [800, 80, 80, 1, 1, 1] [2018-07-25 13:21:51,825 INFO L415 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 759239715, now seen corresponding path program 89 times [2018-07-25 13:21:51,825 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 390000 backedges. 0 proven. 385600 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2018-07-25 13:21:52,714 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:52,714 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-25 13:21:52,714 INFO L451 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-25 13:21:52,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-25 13:21:52,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-25 13:21:52,716 INFO L87 Difference]: Start difference. First operand 964 states and 1044 transitions. Second operand 83 states. [2018-07-25 13:21:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:53,740 INFO L93 Difference]: Finished difference Result 989 states and 1071 transitions. [2018-07-25 13:21:53,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-25 13:21:53,740 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 963 [2018-07-25 13:21:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:53,742 INFO L225 Difference]: With dead ends: 989 [2018-07-25 13:21:53,742 INFO L226 Difference]: Without dead ends: 987 [2018-07-25 13:21:53,743 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-25 13:21:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2018-07-25 13:21:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 976. [2018-07-25 13:21:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2018-07-25 13:21:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1057 transitions. [2018-07-25 13:21:54,710 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1057 transitions. Word has length 963 [2018-07-25 13:21:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:54,710 INFO L472 AbstractCegarLoop]: Abstraction has 976 states and 1057 transitions. [2018-07-25 13:21:54,711 INFO L473 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-25 13:21:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1057 transitions. [2018-07-25 13:21:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2018-07-25 13:21:54,716 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:54,717 INFO L354 BasicCegarLoop]: trace histogram [810, 81, 81, 1, 1, 1] [2018-07-25 13:21:54,717 INFO L415 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -29607059, now seen corresponding path program 90 times [2018-07-25 13:21:54,717 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 399816 backedges. 0 proven. 395361 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2018-07-25 13:21:55,684 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:55,685 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-25 13:21:55,685 INFO L451 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-25 13:21:55,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-25 13:21:55,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-25 13:21:55,686 INFO L87 Difference]: Start difference. First operand 976 states and 1057 transitions. Second operand 84 states. [2018-07-25 13:21:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:56,712 INFO L93 Difference]: Finished difference Result 1001 states and 1084 transitions. [2018-07-25 13:21:56,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-25 13:21:56,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 975 [2018-07-25 13:21:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:56,714 INFO L225 Difference]: With dead ends: 1001 [2018-07-25 13:21:56,714 INFO L226 Difference]: Without dead ends: 999 [2018-07-25 13:21:56,715 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-25 13:21:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2018-07-25 13:21:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 988. [2018-07-25 13:21:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2018-07-25 13:21:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1070 transitions. [2018-07-25 13:21:57,616 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1070 transitions. Word has length 975 [2018-07-25 13:21:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:21:57,616 INFO L472 AbstractCegarLoop]: Abstraction has 988 states and 1070 transitions. [2018-07-25 13:21:57,616 INFO L473 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-25 13:21:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1070 transitions. [2018-07-25 13:21:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2018-07-25 13:21:57,622 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:21:57,623 INFO L354 BasicCegarLoop]: trace histogram [820, 82, 82, 1, 1, 1] [2018-07-25 13:21:57,623 INFO L415 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:21:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash 378848183, now seen corresponding path program 91 times [2018-07-25 13:21:57,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:21:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:21:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 409754 backedges. 0 proven. 405244 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2018-07-25 13:21:58,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:21:58,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-25 13:21:58,560 INFO L451 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-25 13:21:58,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-25 13:21:58,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-25 13:21:58,561 INFO L87 Difference]: Start difference. First operand 988 states and 1070 transitions. Second operand 85 states. [2018-07-25 13:21:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:21:59,664 INFO L93 Difference]: Finished difference Result 1013 states and 1097 transitions. [2018-07-25 13:21:59,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-25 13:21:59,664 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 987 [2018-07-25 13:21:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:21:59,665 INFO L225 Difference]: With dead ends: 1013 [2018-07-25 13:21:59,666 INFO L226 Difference]: Without dead ends: 1011 [2018-07-25 13:21:59,666 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-25 13:21:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2018-07-25 13:22:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1000. [2018-07-25 13:22:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2018-07-25 13:22:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1083 transitions. [2018-07-25 13:22:00,643 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1083 transitions. Word has length 987 [2018-07-25 13:22:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:00,643 INFO L472 AbstractCegarLoop]: Abstraction has 1000 states and 1083 transitions. [2018-07-25 13:22:00,644 INFO L473 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-25 13:22:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1083 transitions. [2018-07-25 13:22:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2018-07-25 13:22:00,649 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:00,650 INFO L354 BasicCegarLoop]: trace histogram [830, 83, 83, 1, 1, 1] [2018-07-25 13:22:00,650 INFO L415 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -129946367, now seen corresponding path program 92 times [2018-07-25 13:22:00,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 419814 backedges. 0 proven. 415249 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2018-07-25 13:22:01,611 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:01,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-25 13:22:01,612 INFO L451 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-25 13:22:01,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-25 13:22:01,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-25 13:22:01,613 INFO L87 Difference]: Start difference. First operand 1000 states and 1083 transitions. Second operand 86 states. [2018-07-25 13:22:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:02,648 INFO L93 Difference]: Finished difference Result 1025 states and 1110 transitions. [2018-07-25 13:22:02,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-25 13:22:02,648 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 999 [2018-07-25 13:22:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:02,650 INFO L225 Difference]: With dead ends: 1025 [2018-07-25 13:22:02,650 INFO L226 Difference]: Without dead ends: 1023 [2018-07-25 13:22:02,650 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-25 13:22:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-07-25 13:22:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1012. [2018-07-25 13:22:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2018-07-25 13:22:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1096 transitions. [2018-07-25 13:22:03,736 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1096 transitions. Word has length 999 [2018-07-25 13:22:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:03,737 INFO L472 AbstractCegarLoop]: Abstraction has 1012 states and 1096 transitions. [2018-07-25 13:22:03,737 INFO L473 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-25 13:22:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1096 transitions. [2018-07-25 13:22:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2018-07-25 13:22:03,743 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:03,744 INFO L354 BasicCegarLoop]: trace histogram [840, 84, 84, 1, 1, 1] [2018-07-25 13:22:03,744 INFO L415 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1735915339, now seen corresponding path program 93 times [2018-07-25 13:22:03,744 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 429996 backedges. 0 proven. 425376 refuted. 0 times theorem prover too weak. 4620 trivial. 0 not checked. [2018-07-25 13:22:04,722 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:04,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-25 13:22:04,723 INFO L451 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-25 13:22:04,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-25 13:22:04,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-25 13:22:04,724 INFO L87 Difference]: Start difference. First operand 1012 states and 1096 transitions. Second operand 87 states. [2018-07-25 13:22:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:05,865 INFO L93 Difference]: Finished difference Result 1037 states and 1123 transitions. [2018-07-25 13:22:05,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-25 13:22:05,865 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 1011 [2018-07-25 13:22:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:05,866 INFO L225 Difference]: With dead ends: 1037 [2018-07-25 13:22:05,866 INFO L226 Difference]: Without dead ends: 1035 [2018-07-25 13:22:05,867 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-25 13:22:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2018-07-25 13:22:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1024. [2018-07-25 13:22:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-07-25 13:22:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1109 transitions. [2018-07-25 13:22:06,911 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1109 transitions. Word has length 1011 [2018-07-25 13:22:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:06,911 INFO L472 AbstractCegarLoop]: Abstraction has 1024 states and 1109 transitions. [2018-07-25 13:22:06,911 INFO L473 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-25 13:22:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1109 transitions. [2018-07-25 13:22:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2018-07-25 13:22:06,917 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:06,918 INFO L354 BasicCegarLoop]: trace histogram [850, 85, 85, 1, 1, 1] [2018-07-25 13:22:06,918 INFO L415 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash 179282581, now seen corresponding path program 94 times [2018-07-25 13:22:06,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 440300 backedges. 0 proven. 435625 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2018-07-25 13:22:07,915 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:07,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-25 13:22:07,916 INFO L451 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-25 13:22:07,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-25 13:22:07,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-25 13:22:07,917 INFO L87 Difference]: Start difference. First operand 1024 states and 1109 transitions. Second operand 88 states. [2018-07-25 13:22:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:09,089 INFO L93 Difference]: Finished difference Result 1049 states and 1136 transitions. [2018-07-25 13:22:09,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-25 13:22:09,089 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1023 [2018-07-25 13:22:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:09,090 INFO L225 Difference]: With dead ends: 1049 [2018-07-25 13:22:09,090 INFO L226 Difference]: Without dead ends: 1047 [2018-07-25 13:22:09,091 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-25 13:22:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2018-07-25 13:22:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1036. [2018-07-25 13:22:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2018-07-25 13:22:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1122 transitions. [2018-07-25 13:22:10,212 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1122 transitions. Word has length 1023 [2018-07-25 13:22:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:10,212 INFO L472 AbstractCegarLoop]: Abstraction has 1036 states and 1122 transitions. [2018-07-25 13:22:10,212 INFO L473 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-25 13:22:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1122 transitions. [2018-07-25 13:22:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2018-07-25 13:22:10,218 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:10,219 INFO L354 BasicCegarLoop]: trace histogram [860, 86, 86, 1, 1, 1] [2018-07-25 13:22:10,219 INFO L415 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 178171615, now seen corresponding path program 95 times [2018-07-25 13:22:10,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 450726 backedges. 0 proven. 445996 refuted. 0 times theorem prover too weak. 4730 trivial. 0 not checked. [2018-07-25 13:22:11,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:11,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-25 13:22:11,235 INFO L451 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-25 13:22:11,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-25 13:22:11,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-25 13:22:11,236 INFO L87 Difference]: Start difference. First operand 1036 states and 1122 transitions. Second operand 89 states. [2018-07-25 13:22:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:12,470 INFO L93 Difference]: Finished difference Result 1061 states and 1149 transitions. [2018-07-25 13:22:12,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-25 13:22:12,470 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 1035 [2018-07-25 13:22:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:12,471 INFO L225 Difference]: With dead ends: 1061 [2018-07-25 13:22:12,471 INFO L226 Difference]: Without dead ends: 1059 [2018-07-25 13:22:12,472 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-25 13:22:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2018-07-25 13:22:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1048. [2018-07-25 13:22:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-07-25 13:22:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1135 transitions. [2018-07-25 13:22:13,514 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1135 transitions. Word has length 1035 [2018-07-25 13:22:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:13,515 INFO L472 AbstractCegarLoop]: Abstraction has 1048 states and 1135 transitions. [2018-07-25 13:22:13,515 INFO L473 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-25 13:22:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1135 transitions. [2018-07-25 13:22:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2018-07-25 13:22:13,521 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:13,521 INFO L354 BasicCegarLoop]: trace histogram [870, 87, 87, 1, 1, 1] [2018-07-25 13:22:13,522 INFO L415 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1304716247, now seen corresponding path program 96 times [2018-07-25 13:22:13,522 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 461274 backedges. 0 proven. 456489 refuted. 0 times theorem prover too weak. 4785 trivial. 0 not checked. [2018-07-25 13:22:14,548 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:14,549 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-25 13:22:14,549 INFO L451 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-25 13:22:14,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-25 13:22:14,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-25 13:22:14,551 INFO L87 Difference]: Start difference. First operand 1048 states and 1135 transitions. Second operand 90 states. [2018-07-25 13:22:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:15,832 INFO L93 Difference]: Finished difference Result 1073 states and 1162 transitions. [2018-07-25 13:22:15,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-25 13:22:15,832 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 1047 [2018-07-25 13:22:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:15,833 INFO L225 Difference]: With dead ends: 1073 [2018-07-25 13:22:15,833 INFO L226 Difference]: Without dead ends: 1071 [2018-07-25 13:22:15,834 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-25 13:22:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-07-25 13:22:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1060. [2018-07-25 13:22:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1060 states. [2018-07-25 13:22:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1148 transitions. [2018-07-25 13:22:16,917 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1148 transitions. Word has length 1047 [2018-07-25 13:22:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:16,917 INFO L472 AbstractCegarLoop]: Abstraction has 1060 states and 1148 transitions. [2018-07-25 13:22:16,917 INFO L473 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-25 13:22:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1148 transitions. [2018-07-25 13:22:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2018-07-25 13:22:16,924 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:16,924 INFO L354 BasicCegarLoop]: trace histogram [880, 88, 88, 1, 1, 1] [2018-07-25 13:22:16,925 INFO L415 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 247261811, now seen corresponding path program 97 times [2018-07-25 13:22:16,925 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 471944 backedges. 0 proven. 467104 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-07-25 13:22:17,998 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:17,998 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-25 13:22:17,998 INFO L451 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-25 13:22:17,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-25 13:22:17,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-25 13:22:18,000 INFO L87 Difference]: Start difference. First operand 1060 states and 1148 transitions. Second operand 91 states. [2018-07-25 13:22:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:19,975 INFO L93 Difference]: Finished difference Result 1085 states and 1175 transitions. [2018-07-25 13:22:19,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-25 13:22:19,975 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1059 [2018-07-25 13:22:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:19,977 INFO L225 Difference]: With dead ends: 1085 [2018-07-25 13:22:19,978 INFO L226 Difference]: Without dead ends: 1083 [2018-07-25 13:22:19,979 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-25 13:22:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2018-07-25 13:22:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1072. [2018-07-25 13:22:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2018-07-25 13:22:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1161 transitions. [2018-07-25 13:22:21,801 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1161 transitions. Word has length 1059 [2018-07-25 13:22:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:21,801 INFO L472 AbstractCegarLoop]: Abstraction has 1072 states and 1161 transitions. [2018-07-25 13:22:21,801 INFO L473 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-25 13:22:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1161 transitions. [2018-07-25 13:22:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2018-07-25 13:22:21,808 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:21,808 INFO L354 BasicCegarLoop]: trace histogram [890, 89, 89, 1, 1, 1] [2018-07-25 13:22:21,808 INFO L415 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1885791811, now seen corresponding path program 98 times [2018-07-25 13:22:21,809 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 482736 backedges. 0 proven. 477841 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2018-07-25 13:22:22,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:22,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-25 13:22:22,925 INFO L451 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-25 13:22:22,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-25 13:22:22,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-25 13:22:22,926 INFO L87 Difference]: Start difference. First operand 1072 states and 1161 transitions. Second operand 92 states. [2018-07-25 13:22:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:24,174 INFO L93 Difference]: Finished difference Result 1097 states and 1188 transitions. [2018-07-25 13:22:24,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-25 13:22:24,174 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 1071 [2018-07-25 13:22:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:24,175 INFO L225 Difference]: With dead ends: 1097 [2018-07-25 13:22:24,175 INFO L226 Difference]: Without dead ends: 1095 [2018-07-25 13:22:24,176 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-25 13:22:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2018-07-25 13:22:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1084. [2018-07-25 13:22:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2018-07-25 13:22:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1174 transitions. [2018-07-25 13:22:25,313 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1174 transitions. Word has length 1071 [2018-07-25 13:22:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:25,313 INFO L472 AbstractCegarLoop]: Abstraction has 1084 states and 1174 transitions. [2018-07-25 13:22:25,314 INFO L473 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-25 13:22:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1174 transitions. [2018-07-25 13:22:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2018-07-25 13:22:25,322 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:25,322 INFO L354 BasicCegarLoop]: trace histogram [900, 90, 90, 1, 1, 1] [2018-07-25 13:22:25,323 INFO L415 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:25,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1501124089, now seen corresponding path program 99 times [2018-07-25 13:22:25,323 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 493650 backedges. 0 proven. 488700 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2018-07-25 13:22:26,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:26,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-25 13:22:26,483 INFO L451 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-25 13:22:26,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-25 13:22:26,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-25 13:22:26,485 INFO L87 Difference]: Start difference. First operand 1084 states and 1174 transitions. Second operand 93 states. [2018-07-25 13:22:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:27,818 INFO L93 Difference]: Finished difference Result 1109 states and 1201 transitions. [2018-07-25 13:22:27,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-25 13:22:27,818 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1083 [2018-07-25 13:22:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:27,819 INFO L225 Difference]: With dead ends: 1109 [2018-07-25 13:22:27,820 INFO L226 Difference]: Without dead ends: 1107 [2018-07-25 13:22:27,820 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-25 13:22:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2018-07-25 13:22:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1096. [2018-07-25 13:22:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1096 states. [2018-07-25 13:22:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1187 transitions. [2018-07-25 13:22:29,020 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1187 transitions. Word has length 1083 [2018-07-25 13:22:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:29,020 INFO L472 AbstractCegarLoop]: Abstraction has 1096 states and 1187 transitions. [2018-07-25 13:22:29,020 INFO L473 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-25 13:22:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1187 transitions. [2018-07-25 13:22:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2018-07-25 13:22:29,026 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:29,027 INFO L354 BasicCegarLoop]: trace histogram [910, 91, 91, 1, 1, 1] [2018-07-25 13:22:29,027 INFO L415 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1736186705, now seen corresponding path program 100 times [2018-07-25 13:22:29,027 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 504686 backedges. 0 proven. 499681 refuted. 0 times theorem prover too weak. 5005 trivial. 0 not checked. [2018-07-25 13:22:30,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:30,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-25 13:22:30,196 INFO L451 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-25 13:22:30,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-25 13:22:30,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-25 13:22:30,197 INFO L87 Difference]: Start difference. First operand 1096 states and 1187 transitions. Second operand 94 states. [2018-07-25 13:22:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:31,508 INFO L93 Difference]: Finished difference Result 1121 states and 1214 transitions. [2018-07-25 13:22:31,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-25 13:22:31,508 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1095 [2018-07-25 13:22:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:31,509 INFO L225 Difference]: With dead ends: 1121 [2018-07-25 13:22:31,509 INFO L226 Difference]: Without dead ends: 1119 [2018-07-25 13:22:31,510 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-25 13:22:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-07-25 13:22:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1108. [2018-07-25 13:22:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2018-07-25 13:22:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1200 transitions. [2018-07-25 13:22:32,713 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1200 transitions. Word has length 1095 [2018-07-25 13:22:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:32,714 INFO L472 AbstractCegarLoop]: Abstraction has 1108 states and 1200 transitions. [2018-07-25 13:22:32,714 INFO L473 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-25 13:22:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1200 transitions. [2018-07-25 13:22:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2018-07-25 13:22:32,720 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:32,721 INFO L354 BasicCegarLoop]: trace histogram [920, 92, 92, 1, 1, 1] [2018-07-25 13:22:32,721 INFO L415 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 682618267, now seen corresponding path program 101 times [2018-07-25 13:22:32,721 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 515844 backedges. 0 proven. 510784 refuted. 0 times theorem prover too weak. 5060 trivial. 0 not checked. [2018-07-25 13:22:33,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:33,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-25 13:22:33,899 INFO L451 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-25 13:22:33,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-25 13:22:33,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-25 13:22:33,900 INFO L87 Difference]: Start difference. First operand 1108 states and 1200 transitions. Second operand 95 states. [2018-07-25 13:22:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:35,305 INFO L93 Difference]: Finished difference Result 1133 states and 1227 transitions. [2018-07-25 13:22:35,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-25 13:22:35,305 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 1107 [2018-07-25 13:22:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:35,307 INFO L225 Difference]: With dead ends: 1133 [2018-07-25 13:22:35,307 INFO L226 Difference]: Without dead ends: 1131 [2018-07-25 13:22:35,308 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-25 13:22:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2018-07-25 13:22:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1120. [2018-07-25 13:22:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2018-07-25 13:22:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1213 transitions. [2018-07-25 13:22:36,552 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1213 transitions. Word has length 1107 [2018-07-25 13:22:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:36,553 INFO L472 AbstractCegarLoop]: Abstraction has 1120 states and 1213 transitions. [2018-07-25 13:22:36,553 INFO L473 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-25 13:22:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1213 transitions. [2018-07-25 13:22:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2018-07-25 13:22:36,559 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:36,559 INFO L354 BasicCegarLoop]: trace histogram [930, 93, 93, 1, 1, 1] [2018-07-25 13:22:36,559 INFO L415 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 580428005, now seen corresponding path program 102 times [2018-07-25 13:22:36,560 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 527124 backedges. 0 proven. 522009 refuted. 0 times theorem prover too weak. 5115 trivial. 0 not checked. [2018-07-25 13:22:37,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:37,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-25 13:22:37,745 INFO L451 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-25 13:22:37,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-25 13:22:37,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-25 13:22:37,746 INFO L87 Difference]: Start difference. First operand 1120 states and 1213 transitions. Second operand 96 states. [2018-07-25 13:22:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:39,202 INFO L93 Difference]: Finished difference Result 1145 states and 1240 transitions. [2018-07-25 13:22:39,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-25 13:22:39,202 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 1119 [2018-07-25 13:22:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:39,203 INFO L225 Difference]: With dead ends: 1145 [2018-07-25 13:22:39,203 INFO L226 Difference]: Without dead ends: 1143 [2018-07-25 13:22:39,203 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-25 13:22:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-07-25 13:22:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1132. [2018-07-25 13:22:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2018-07-25 13:22:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1226 transitions. [2018-07-25 13:22:40,479 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1226 transitions. Word has length 1119 [2018-07-25 13:22:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:40,480 INFO L472 AbstractCegarLoop]: Abstraction has 1132 states and 1226 transitions. [2018-07-25 13:22:40,480 INFO L473 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-25 13:22:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1226 transitions. [2018-07-25 13:22:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2018-07-25 13:22:40,487 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:40,487 INFO L354 BasicCegarLoop]: trace histogram [940, 94, 94, 1, 1, 1] [2018-07-25 13:22:40,487 INFO L415 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash 267171119, now seen corresponding path program 103 times [2018-07-25 13:22:40,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 538526 backedges. 0 proven. 533356 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2018-07-25 13:22:41,735 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:41,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-25 13:22:41,736 INFO L451 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-25 13:22:41,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-25 13:22:41,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-25 13:22:41,737 INFO L87 Difference]: Start difference. First operand 1132 states and 1226 transitions. Second operand 97 states. [2018-07-25 13:22:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:43,213 INFO L93 Difference]: Finished difference Result 1157 states and 1253 transitions. [2018-07-25 13:22:43,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-25 13:22:43,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1131 [2018-07-25 13:22:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:43,215 INFO L225 Difference]: With dead ends: 1157 [2018-07-25 13:22:43,215 INFO L226 Difference]: Without dead ends: 1155 [2018-07-25 13:22:43,215 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-25 13:22:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2018-07-25 13:22:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1144. [2018-07-25 13:22:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1144 states. [2018-07-25 13:22:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1239 transitions. [2018-07-25 13:22:44,506 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1239 transitions. Word has length 1131 [2018-07-25 13:22:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:44,507 INFO L472 AbstractCegarLoop]: Abstraction has 1144 states and 1239 transitions. [2018-07-25 13:22:44,507 INFO L473 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-25 13:22:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1239 transitions. [2018-07-25 13:22:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2018-07-25 13:22:44,514 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:44,514 INFO L354 BasicCegarLoop]: trace histogram [950, 95, 95, 1, 1, 1] [2018-07-25 13:22:44,514 INFO L415 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:44,514 INFO L82 PathProgramCache]: Analyzing trace with hash -844977543, now seen corresponding path program 104 times [2018-07-25 13:22:44,515 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 550050 backedges. 0 proven. 544825 refuted. 0 times theorem prover too weak. 5225 trivial. 0 not checked. [2018-07-25 13:22:45,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:45,776 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-25 13:22:45,777 INFO L451 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-25 13:22:45,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-25 13:22:45,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-25 13:22:45,778 INFO L87 Difference]: Start difference. First operand 1144 states and 1239 transitions. Second operand 98 states. [2018-07-25 13:22:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:47,268 INFO L93 Difference]: Finished difference Result 1169 states and 1266 transitions. [2018-07-25 13:22:47,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-25 13:22:47,268 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 1143 [2018-07-25 13:22:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:47,270 INFO L225 Difference]: With dead ends: 1169 [2018-07-25 13:22:47,270 INFO L226 Difference]: Without dead ends: 1167 [2018-07-25 13:22:47,270 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-25 13:22:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-07-25 13:22:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1156. [2018-07-25 13:22:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2018-07-25 13:22:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1252 transitions. [2018-07-25 13:22:48,605 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1252 transitions. Word has length 1143 [2018-07-25 13:22:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:48,606 INFO L472 AbstractCegarLoop]: Abstraction has 1156 states and 1252 transitions. [2018-07-25 13:22:48,606 INFO L473 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-25 13:22:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1252 transitions. [2018-07-25 13:22:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-07-25 13:22:48,613 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:48,613 INFO L354 BasicCegarLoop]: trace histogram [960, 96, 96, 1, 1, 1] [2018-07-25 13:22:48,613 INFO L415 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash -84868925, now seen corresponding path program 105 times [2018-07-25 13:22:48,614 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 561696 backedges. 0 proven. 556416 refuted. 0 times theorem prover too weak. 5280 trivial. 0 not checked. [2018-07-25 13:22:49,890 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:49,890 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-25 13:22:49,891 INFO L451 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-25 13:22:49,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-25 13:22:49,892 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-25 13:22:49,892 INFO L87 Difference]: Start difference. First operand 1156 states and 1252 transitions. Second operand 99 states. [2018-07-25 13:22:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:51,488 INFO L93 Difference]: Finished difference Result 1181 states and 1279 transitions. [2018-07-25 13:22:51,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-25 13:22:51,488 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 1155 [2018-07-25 13:22:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:51,490 INFO L225 Difference]: With dead ends: 1181 [2018-07-25 13:22:51,490 INFO L226 Difference]: Without dead ends: 1179 [2018-07-25 13:22:51,490 INFO L574 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 [2018-07-25 13:22:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2018-07-25 13:22:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1168. [2018-07-25 13:22:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2018-07-25 13:22:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1265 transitions. [2018-07-25 13:22:52,854 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1265 transitions. Word has length 1155 [2018-07-25 13:22:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:52,855 INFO L472 AbstractCegarLoop]: Abstraction has 1168 states and 1265 transitions. [2018-07-25 13:22:52,855 INFO L473 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-25 13:22:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1265 transitions. [2018-07-25 13:22:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2018-07-25 13:22:52,862 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:52,862 INFO L354 BasicCegarLoop]: trace histogram [970, 97, 97, 1, 1, 1] [2018-07-25 13:22:52,862 INFO L415 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1722927091, now seen corresponding path program 106 times [2018-07-25 13:22:52,863 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 573464 backedges. 0 proven. 568129 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2018-07-25 13:22:54,174 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:54,174 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-25 13:22:54,175 INFO L451 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-25 13:22:54,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-25 13:22:54,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-25 13:22:54,176 INFO L87 Difference]: Start difference. First operand 1168 states and 1265 transitions. Second operand 100 states. [2018-07-25 13:22:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:22:55,658 INFO L93 Difference]: Finished difference Result 1193 states and 1292 transitions. [2018-07-25 13:22:55,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-25 13:22:55,659 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1167 [2018-07-25 13:22:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:22:55,660 INFO L225 Difference]: With dead ends: 1193 [2018-07-25 13:22:55,660 INFO L226 Difference]: Without dead ends: 1191 [2018-07-25 13:22:55,661 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-25 13:22:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-07-25 13:22:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-07-25 13:22:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-07-25 13:22:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1278 transitions. [2018-07-25 13:22:57,080 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1278 transitions. Word has length 1167 [2018-07-25 13:22:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:22:57,081 INFO L472 AbstractCegarLoop]: Abstraction has 1180 states and 1278 transitions. [2018-07-25 13:22:57,081 INFO L473 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-25 13:22:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1278 transitions. [2018-07-25 13:22:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2018-07-25 13:22:57,088 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:22:57,088 INFO L354 BasicCegarLoop]: trace histogram [980, 98, 98, 1, 1, 1] [2018-07-25 13:22:57,088 INFO L415 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:22:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1401892777, now seen corresponding path program 107 times [2018-07-25 13:22:57,089 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:22:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:22:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 585354 backedges. 0 proven. 579964 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2018-07-25 13:22:58,421 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:22:58,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-25 13:22:58,422 INFO L451 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-25 13:22:58,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-25 13:22:58,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-25 13:22:58,423 INFO L87 Difference]: Start difference. First operand 1180 states and 1278 transitions. Second operand 101 states. [2018-07-25 13:23:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:00,014 INFO L93 Difference]: Finished difference Result 1205 states and 1305 transitions. [2018-07-25 13:23:00,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-25 13:23:00,015 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 1179 [2018-07-25 13:23:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:00,016 INFO L225 Difference]: With dead ends: 1205 [2018-07-25 13:23:00,016 INFO L226 Difference]: Without dead ends: 1203 [2018-07-25 13:23:00,017 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-25 13:23:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2018-07-25 13:23:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1192. [2018-07-25 13:23:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2018-07-25 13:23:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1291 transitions. [2018-07-25 13:23:01,458 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1291 transitions. Word has length 1179 [2018-07-25 13:23:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:01,458 INFO L472 AbstractCegarLoop]: Abstraction has 1192 states and 1291 transitions. [2018-07-25 13:23:01,458 INFO L473 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-25 13:23:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1291 transitions. [2018-07-25 13:23:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2018-07-25 13:23:01,466 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:01,466 INFO L354 BasicCegarLoop]: trace histogram [990, 99, 99, 1, 1, 1] [2018-07-25 13:23:01,466 INFO L415 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash -632338015, now seen corresponding path program 108 times [2018-07-25 13:23:01,466 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 597366 backedges. 0 proven. 591921 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2018-07-25 13:23:02,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:02,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-25 13:23:02,809 INFO L451 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-25 13:23:02,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-25 13:23:02,811 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-25 13:23:02,811 INFO L87 Difference]: Start difference. First operand 1192 states and 1291 transitions. Second operand 102 states. [2018-07-25 13:23:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:04,398 INFO L93 Difference]: Finished difference Result 1217 states and 1318 transitions. [2018-07-25 13:23:04,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-25 13:23:04,398 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 1191 [2018-07-25 13:23:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:04,399 INFO L225 Difference]: With dead ends: 1217 [2018-07-25 13:23:04,399 INFO L226 Difference]: Without dead ends: 1215 [2018-07-25 13:23:04,400 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-25 13:23:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-07-25 13:23:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1204. [2018-07-25 13:23:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2018-07-25 13:23:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1304 transitions. [2018-07-25 13:23:05,883 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1304 transitions. Word has length 1191 [2018-07-25 13:23:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:05,883 INFO L472 AbstractCegarLoop]: Abstraction has 1204 states and 1304 transitions. [2018-07-25 13:23:05,883 INFO L473 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-25 13:23:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1304 transitions. [2018-07-25 13:23:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2018-07-25 13:23:05,892 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:05,892 INFO L354 BasicCegarLoop]: trace histogram [1000, 100, 100, 1, 1, 1] [2018-07-25 13:23:05,892 INFO L415 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 186655723, now seen corresponding path program 109 times [2018-07-25 13:23:05,892 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 609500 backedges. 0 proven. 604000 refuted. 0 times theorem prover too weak. 5500 trivial. 0 not checked. [2018-07-25 13:23:07,276 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:07,276 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-25 13:23:07,276 INFO L451 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-25 13:23:07,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-25 13:23:07,277 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-25 13:23:07,277 INFO L87 Difference]: Start difference. First operand 1204 states and 1304 transitions. Second operand 103 states. [2018-07-25 13:23:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:09,015 INFO L93 Difference]: Finished difference Result 1229 states and 1331 transitions. [2018-07-25 13:23:09,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-25 13:23:09,015 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1203 [2018-07-25 13:23:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:09,017 INFO L225 Difference]: With dead ends: 1229 [2018-07-25 13:23:09,017 INFO L226 Difference]: Without dead ends: 1227 [2018-07-25 13:23:09,018 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-25 13:23:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2018-07-25 13:23:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2018-07-25 13:23:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2018-07-25 13:23:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1317 transitions. [2018-07-25 13:23:10,533 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1317 transitions. Word has length 1203 [2018-07-25 13:23:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:10,533 INFO L472 AbstractCegarLoop]: Abstraction has 1216 states and 1317 transitions. [2018-07-25 13:23:10,533 INFO L473 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-25 13:23:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1317 transitions. [2018-07-25 13:23:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2018-07-25 13:23:10,541 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:10,541 INFO L354 BasicCegarLoop]: trace histogram [1010, 101, 101, 1, 1, 1] [2018-07-25 13:23:10,541 INFO L415 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 156884789, now seen corresponding path program 110 times [2018-07-25 13:23:10,542 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 621756 backedges. 0 proven. 616201 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2018-07-25 13:23:12,581 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:12,581 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-25 13:23:12,582 INFO L451 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-25 13:23:12,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-25 13:23:12,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-25 13:23:12,583 INFO L87 Difference]: Start difference. First operand 1216 states and 1317 transitions. Second operand 104 states. [2018-07-25 13:23:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:14,358 INFO L93 Difference]: Finished difference Result 1241 states and 1344 transitions. [2018-07-25 13:23:14,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-25 13:23:14,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 1215 [2018-07-25 13:23:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:14,360 INFO L225 Difference]: With dead ends: 1241 [2018-07-25 13:23:14,360 INFO L226 Difference]: Without dead ends: 1239 [2018-07-25 13:23:14,360 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-25 13:23:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-07-25 13:23:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1228. [2018-07-25 13:23:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2018-07-25 13:23:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1330 transitions. [2018-07-25 13:23:15,910 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1330 transitions. Word has length 1215 [2018-07-25 13:23:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:15,911 INFO L472 AbstractCegarLoop]: Abstraction has 1228 states and 1330 transitions. [2018-07-25 13:23:15,911 INFO L473 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-25 13:23:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1330 transitions. [2018-07-25 13:23:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2018-07-25 13:23:15,919 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:15,919 INFO L354 BasicCegarLoop]: trace histogram [1020, 102, 102, 1, 1, 1] [2018-07-25 13:23:15,919 INFO L415 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 565377919, now seen corresponding path program 111 times [2018-07-25 13:23:15,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 634134 backedges. 0 proven. 628524 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2018-07-25 13:23:17,332 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:17,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-25 13:23:17,333 INFO L451 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-25 13:23:17,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-25 13:23:17,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-25 13:23:17,334 INFO L87 Difference]: Start difference. First operand 1228 states and 1330 transitions. Second operand 105 states. [2018-07-25 13:23:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:19,016 INFO L93 Difference]: Finished difference Result 1253 states and 1357 transitions. [2018-07-25 13:23:19,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-25 13:23:19,016 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 1227 [2018-07-25 13:23:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:19,018 INFO L225 Difference]: With dead ends: 1253 [2018-07-25 13:23:19,018 INFO L226 Difference]: Without dead ends: 1251 [2018-07-25 13:23:19,019 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-25 13:23:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2018-07-25 13:23:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1240. [2018-07-25 13:23:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-07-25 13:23:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1343 transitions. [2018-07-25 13:23:20,591 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1343 transitions. Word has length 1227 [2018-07-25 13:23:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:20,591 INFO L472 AbstractCegarLoop]: Abstraction has 1240 states and 1343 transitions. [2018-07-25 13:23:20,591 INFO L473 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-25 13:23:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1343 transitions. [2018-07-25 13:23:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2018-07-25 13:23:20,599 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:20,599 INFO L354 BasicCegarLoop]: trace histogram [1030, 103, 103, 1, 1, 1] [2018-07-25 13:23:20,600 INFO L415 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1021183799, now seen corresponding path program 112 times [2018-07-25 13:23:20,600 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 646634 backedges. 0 proven. 640969 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2018-07-25 13:23:22,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:22,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-25 13:23:22,052 INFO L451 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-25 13:23:22,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-25 13:23:22,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-25 13:23:22,053 INFO L87 Difference]: Start difference. First operand 1240 states and 1343 transitions. Second operand 106 states. [2018-07-25 13:23:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:23,815 INFO L93 Difference]: Finished difference Result 1265 states and 1370 transitions. [2018-07-25 13:23:23,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-25 13:23:23,816 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 1239 [2018-07-25 13:23:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:23,817 INFO L225 Difference]: With dead ends: 1265 [2018-07-25 13:23:23,817 INFO L226 Difference]: Without dead ends: 1263 [2018-07-25 13:23:23,818 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-25 13:23:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-07-25 13:23:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1252. [2018-07-25 13:23:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1252 states. [2018-07-25 13:23:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1356 transitions. [2018-07-25 13:23:25,431 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1356 transitions. Word has length 1239 [2018-07-25 13:23:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:25,431 INFO L472 AbstractCegarLoop]: Abstraction has 1252 states and 1356 transitions. [2018-07-25 13:23:25,432 INFO L473 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-25 13:23:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1356 transitions. [2018-07-25 13:23:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2018-07-25 13:23:25,439 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:25,440 INFO L354 BasicCegarLoop]: trace histogram [1040, 104, 104, 1, 1, 1] [2018-07-25 13:23:25,440 INFO L415 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash 517822227, now seen corresponding path program 113 times [2018-07-25 13:23:25,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 659256 backedges. 0 proven. 653536 refuted. 0 times theorem prover too weak. 5720 trivial. 0 not checked. [2018-07-25 13:23:27,093 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:27,093 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-25 13:23:27,094 INFO L451 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-25 13:23:27,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-25 13:23:27,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-25 13:23:27,095 INFO L87 Difference]: Start difference. First operand 1252 states and 1356 transitions. Second operand 107 states. [2018-07-25 13:23:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:28,843 INFO L93 Difference]: Finished difference Result 1277 states and 1383 transitions. [2018-07-25 13:23:28,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-25 13:23:28,843 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 1251 [2018-07-25 13:23:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:28,845 INFO L225 Difference]: With dead ends: 1277 [2018-07-25 13:23:28,846 INFO L226 Difference]: Without dead ends: 1275 [2018-07-25 13:23:28,846 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-25 13:23:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2018-07-25 13:23:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1264. [2018-07-25 13:23:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2018-07-25 13:23:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1369 transitions. [2018-07-25 13:23:30,498 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1369 transitions. Word has length 1251 [2018-07-25 13:23:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:30,498 INFO L472 AbstractCegarLoop]: Abstraction has 1264 states and 1369 transitions. [2018-07-25 13:23:30,498 INFO L473 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-25 13:23:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1369 transitions. [2018-07-25 13:23:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2018-07-25 13:23:30,506 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:30,507 INFO L354 BasicCegarLoop]: trace histogram [1050, 105, 105, 1, 1, 1] [2018-07-25 13:23:30,507 INFO L415 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -933521827, now seen corresponding path program 114 times [2018-07-25 13:23:30,507 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 672000 backedges. 0 proven. 666225 refuted. 0 times theorem prover too weak. 5775 trivial. 0 not checked. [2018-07-25 13:23:32,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:32,056 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-25 13:23:32,057 INFO L451 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-25 13:23:32,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-25 13:23:32,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-25 13:23:32,059 INFO L87 Difference]: Start difference. First operand 1264 states and 1369 transitions. Second operand 108 states. [2018-07-25 13:23:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:34,068 INFO L93 Difference]: Finished difference Result 1289 states and 1396 transitions. [2018-07-25 13:23:34,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-25 13:23:34,068 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 1263 [2018-07-25 13:23:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:34,069 INFO L225 Difference]: With dead ends: 1289 [2018-07-25 13:23:34,070 INFO L226 Difference]: Without dead ends: 1287 [2018-07-25 13:23:34,070 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-25 13:23:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2018-07-25 13:23:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1276. [2018-07-25 13:23:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2018-07-25 13:23:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1382 transitions. [2018-07-25 13:23:35,758 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1382 transitions. Word has length 1263 [2018-07-25 13:23:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:35,758 INFO L472 AbstractCegarLoop]: Abstraction has 1276 states and 1382 transitions. [2018-07-25 13:23:35,758 INFO L473 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-25 13:23:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1382 transitions. [2018-07-25 13:23:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2018-07-25 13:23:35,767 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:35,767 INFO L354 BasicCegarLoop]: trace histogram [1060, 106, 106, 1, 1, 1] [2018-07-25 13:23:35,767 INFO L415 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1431516839, now seen corresponding path program 115 times [2018-07-25 13:23:35,768 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 684866 backedges. 0 proven. 679036 refuted. 0 times theorem prover too weak. 5830 trivial. 0 not checked. [2018-07-25 13:23:37,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:37,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-25 13:23:37,353 INFO L451 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-25 13:23:37,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-25 13:23:37,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-25 13:23:37,354 INFO L87 Difference]: Start difference. First operand 1276 states and 1382 transitions. Second operand 109 states. [2018-07-25 13:23:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:39,347 INFO L93 Difference]: Finished difference Result 1301 states and 1409 transitions. [2018-07-25 13:23:39,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-25 13:23:39,347 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1275 [2018-07-25 13:23:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:39,348 INFO L225 Difference]: With dead ends: 1301 [2018-07-25 13:23:39,348 INFO L226 Difference]: Without dead ends: 1299 [2018-07-25 13:23:39,349 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-25 13:23:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2018-07-25 13:23:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1288. [2018-07-25 13:23:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2018-07-25 13:23:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1395 transitions. [2018-07-25 13:23:41,134 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1395 transitions. Word has length 1275 [2018-07-25 13:23:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:41,135 INFO L472 AbstractCegarLoop]: Abstraction has 1288 states and 1395 transitions. [2018-07-25 13:23:41,135 INFO L473 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-25 13:23:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1395 transitions. [2018-07-25 13:23:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2018-07-25 13:23:41,144 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:41,144 INFO L354 BasicCegarLoop]: trace histogram [1070, 107, 107, 1, 1, 1] [2018-07-25 13:23:41,144 INFO L415 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:41,144 INFO L82 PathProgramCache]: Analyzing trace with hash -38094863, now seen corresponding path program 116 times [2018-07-25 13:23:41,144 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 697854 backedges. 0 proven. 691969 refuted. 0 times theorem prover too weak. 5885 trivial. 0 not checked. [2018-07-25 13:23:43,172 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:43,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-25 13:23:43,173 INFO L451 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-25 13:23:43,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-25 13:23:43,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-25 13:23:43,174 INFO L87 Difference]: Start difference. First operand 1288 states and 1395 transitions. Second operand 110 states. [2018-07-25 13:23:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:45,274 INFO L93 Difference]: Finished difference Result 1313 states and 1422 transitions. [2018-07-25 13:23:45,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-25 13:23:45,274 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 1287 [2018-07-25 13:23:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:45,276 INFO L225 Difference]: With dead ends: 1313 [2018-07-25 13:23:45,276 INFO L226 Difference]: Without dead ends: 1311 [2018-07-25 13:23:45,276 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-25 13:23:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-07-25 13:23:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1300. [2018-07-25 13:23:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1300 states. [2018-07-25 13:23:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1408 transitions. [2018-07-25 13:23:47,052 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1408 transitions. Word has length 1287 [2018-07-25 13:23:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:47,053 INFO L472 AbstractCegarLoop]: Abstraction has 1300 states and 1408 transitions. [2018-07-25 13:23:47,053 INFO L473 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-25 13:23:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1408 transitions. [2018-07-25 13:23:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2018-07-25 13:23:47,062 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:47,062 INFO L354 BasicCegarLoop]: trace histogram [1080, 108, 108, 1, 1, 1] [2018-07-25 13:23:47,062 INFO L415 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1003002427, now seen corresponding path program 117 times [2018-07-25 13:23:47,063 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 710964 backedges. 0 proven. 705024 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2018-07-25 13:23:48,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:48,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-25 13:23:48,713 INFO L451 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-25 13:23:48,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-25 13:23:48,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-25 13:23:48,715 INFO L87 Difference]: Start difference. First operand 1300 states and 1408 transitions. Second operand 111 states. [2018-07-25 13:23:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:50,808 INFO L93 Difference]: Finished difference Result 1325 states and 1435 transitions. [2018-07-25 13:23:50,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-25 13:23:50,809 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 1299 [2018-07-25 13:23:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:50,810 INFO L225 Difference]: With dead ends: 1325 [2018-07-25 13:23:50,810 INFO L226 Difference]: Without dead ends: 1323 [2018-07-25 13:23:50,811 INFO L574 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 [2018-07-25 13:23:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2018-07-25 13:23:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1312. [2018-07-25 13:23:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2018-07-25 13:23:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1421 transitions. [2018-07-25 13:23:52,671 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1421 transitions. Word has length 1299 [2018-07-25 13:23:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:52,671 INFO L472 AbstractCegarLoop]: Abstraction has 1312 states and 1421 transitions. [2018-07-25 13:23:52,671 INFO L473 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-25 13:23:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1421 transitions. [2018-07-25 13:23:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1312 [2018-07-25 13:23:52,681 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:52,681 INFO L354 BasicCegarLoop]: trace histogram [1090, 109, 109, 1, 1, 1] [2018-07-25 13:23:52,681 INFO L415 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1811111301, now seen corresponding path program 118 times [2018-07-25 13:23:52,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:23:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 724196 backedges. 0 proven. 718201 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2018-07-25 13:23:54,594 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:23:54,594 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-25 13:23:54,595 INFO L451 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-25 13:23:54,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-25 13:23:54,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-25 13:23:54,596 INFO L87 Difference]: Start difference. First operand 1312 states and 1421 transitions. Second operand 112 states. [2018-07-25 13:23:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:23:56,793 INFO L93 Difference]: Finished difference Result 1337 states and 1448 transitions. [2018-07-25 13:23:56,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-25 13:23:56,793 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 1311 [2018-07-25 13:23:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:23:56,794 INFO L225 Difference]: With dead ends: 1337 [2018-07-25 13:23:56,794 INFO L226 Difference]: Without dead ends: 1335 [2018-07-25 13:23:56,795 INFO L574 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 [2018-07-25 13:23:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2018-07-25 13:23:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1324. [2018-07-25 13:23:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2018-07-25 13:23:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1434 transitions. [2018-07-25 13:23:58,654 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1434 transitions. Word has length 1311 [2018-07-25 13:23:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:23:58,655 INFO L472 AbstractCegarLoop]: Abstraction has 1324 states and 1434 transitions. [2018-07-25 13:23:58,655 INFO L473 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-25 13:23:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1434 transitions. [2018-07-25 13:23:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2018-07-25 13:23:58,664 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:23:58,664 INFO L354 BasicCegarLoop]: trace histogram [1100, 110, 110, 1, 1, 1] [2018-07-25 13:23:58,664 INFO L415 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:23:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1827766735, now seen corresponding path program 119 times [2018-07-25 13:23:58,664 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:23:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 737550 backedges. 0 proven. 731500 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-07-25 13:24:00,360 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:00,361 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-25 13:24:00,361 INFO L451 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-25 13:24:00,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-25 13:24:00,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-25 13:24:00,363 INFO L87 Difference]: Start difference. First operand 1324 states and 1434 transitions. Second operand 113 states. [2018-07-25 13:24:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:02,451 INFO L93 Difference]: Finished difference Result 1349 states and 1461 transitions. [2018-07-25 13:24:02,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-25 13:24:02,452 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 1323 [2018-07-25 13:24:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:02,453 INFO L225 Difference]: With dead ends: 1349 [2018-07-25 13:24:02,454 INFO L226 Difference]: Without dead ends: 1347 [2018-07-25 13:24:02,454 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-25 13:24:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2018-07-25 13:24:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1336. [2018-07-25 13:24:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2018-07-25 13:24:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1447 transitions. [2018-07-25 13:24:04,417 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1447 transitions. Word has length 1323 [2018-07-25 13:24:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:04,417 INFO L472 AbstractCegarLoop]: Abstraction has 1336 states and 1447 transitions. [2018-07-25 13:24:04,417 INFO L473 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-25 13:24:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1447 transitions. [2018-07-25 13:24:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2018-07-25 13:24:04,426 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:04,426 INFO L354 BasicCegarLoop]: trace histogram [1110, 111, 111, 1, 1, 1] [2018-07-25 13:24:04,426 INFO L415 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1069123353, now seen corresponding path program 120 times [2018-07-25 13:24:04,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 751026 backedges. 0 proven. 744921 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2018-07-25 13:24:06,128 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:06,129 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-25 13:24:06,129 INFO L451 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-25 13:24:06,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-25 13:24:06,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-25 13:24:06,130 INFO L87 Difference]: Start difference. First operand 1336 states and 1447 transitions. Second operand 114 states. [2018-07-25 13:24:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:08,255 INFO L93 Difference]: Finished difference Result 1361 states and 1474 transitions. [2018-07-25 13:24:08,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-25 13:24:08,256 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 1335 [2018-07-25 13:24:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:08,257 INFO L225 Difference]: With dead ends: 1361 [2018-07-25 13:24:08,257 INFO L226 Difference]: Without dead ends: 1359 [2018-07-25 13:24:08,258 INFO L574 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 [2018-07-25 13:24:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-07-25 13:24:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1348. [2018-07-25 13:24:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2018-07-25 13:24:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1460 transitions. [2018-07-25 13:24:10,205 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1460 transitions. Word has length 1335 [2018-07-25 13:24:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:10,205 INFO L472 AbstractCegarLoop]: Abstraction has 1348 states and 1460 transitions. [2018-07-25 13:24:10,205 INFO L473 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-25 13:24:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1460 transitions. [2018-07-25 13:24:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2018-07-25 13:24:10,214 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:10,215 INFO L354 BasicCegarLoop]: trace histogram [1120, 112, 112, 1, 1, 1] [2018-07-25 13:24:10,215 INFO L415 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1484657309, now seen corresponding path program 121 times [2018-07-25 13:24:10,215 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 764624 backedges. 0 proven. 758464 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2018-07-25 13:24:12,018 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:12,018 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-25 13:24:12,018 INFO L451 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-25 13:24:12,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-25 13:24:12,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-25 13:24:12,019 INFO L87 Difference]: Start difference. First operand 1348 states and 1460 transitions. Second operand 115 states. [2018-07-25 13:24:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:14,254 INFO L93 Difference]: Finished difference Result 1373 states and 1487 transitions. [2018-07-25 13:24:14,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-25 13:24:14,254 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 1347 [2018-07-25 13:24:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:14,256 INFO L225 Difference]: With dead ends: 1373 [2018-07-25 13:24:14,256 INFO L226 Difference]: Without dead ends: 1371 [2018-07-25 13:24:14,257 INFO L574 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 [2018-07-25 13:24:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2018-07-25 13:24:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2018-07-25 13:24:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2018-07-25 13:24:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1473 transitions. [2018-07-25 13:24:16,276 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1473 transitions. Word has length 1347 [2018-07-25 13:24:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:16,277 INFO L472 AbstractCegarLoop]: Abstraction has 1360 states and 1473 transitions. [2018-07-25 13:24:16,277 INFO L473 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-25 13:24:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1473 transitions. [2018-07-25 13:24:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2018-07-25 13:24:16,286 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:16,287 INFO L354 BasicCegarLoop]: trace histogram [1130, 113, 113, 1, 1, 1] [2018-07-25 13:24:16,287 INFO L415 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -910084947, now seen corresponding path program 122 times [2018-07-25 13:24:16,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 778344 backedges. 0 proven. 772129 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2018-07-25 13:24:18,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:18,106 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-25 13:24:18,107 INFO L451 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-25 13:24:18,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-25 13:24:18,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-25 13:24:18,108 INFO L87 Difference]: Start difference. First operand 1360 states and 1473 transitions. Second operand 116 states. [2018-07-25 13:24:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:20,524 INFO L93 Difference]: Finished difference Result 1385 states and 1500 transitions. [2018-07-25 13:24:20,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-25 13:24:20,525 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 1359 [2018-07-25 13:24:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:20,526 INFO L225 Difference]: With dead ends: 1385 [2018-07-25 13:24:20,526 INFO L226 Difference]: Without dead ends: 1383 [2018-07-25 13:24:20,527 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-25 13:24:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2018-07-25 13:24:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1372. [2018-07-25 13:24:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2018-07-25 13:24:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1486 transitions. [2018-07-25 13:24:22,593 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1486 transitions. Word has length 1359 [2018-07-25 13:24:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:22,594 INFO L472 AbstractCegarLoop]: Abstraction has 1372 states and 1486 transitions. [2018-07-25 13:24:22,594 INFO L473 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-25 13:24:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1486 transitions. [2018-07-25 13:24:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2018-07-25 13:24:22,604 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:22,604 INFO L354 BasicCegarLoop]: trace histogram [1140, 114, 114, 1, 1, 1] [2018-07-25 13:24:22,604 INFO L415 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash -835855113, now seen corresponding path program 123 times [2018-07-25 13:24:22,605 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 792186 backedges. 0 proven. 785916 refuted. 0 times theorem prover too weak. 6270 trivial. 0 not checked. [2018-07-25 13:24:24,403 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:24,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-25 13:24:24,403 INFO L451 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-25 13:24:24,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-25 13:24:24,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-25 13:24:24,404 INFO L87 Difference]: Start difference. First operand 1372 states and 1486 transitions. Second operand 117 states. [2018-07-25 13:24:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:26,897 INFO L93 Difference]: Finished difference Result 1397 states and 1513 transitions. [2018-07-25 13:24:26,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-25 13:24:26,897 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 1371 [2018-07-25 13:24:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:26,898 INFO L225 Difference]: With dead ends: 1397 [2018-07-25 13:24:26,899 INFO L226 Difference]: Without dead ends: 1395 [2018-07-25 13:24:26,900 INFO L574 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 [2018-07-25 13:24:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2018-07-25 13:24:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1384. [2018-07-25 13:24:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-07-25 13:24:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1499 transitions. [2018-07-25 13:24:29,000 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1499 transitions. Word has length 1371 [2018-07-25 13:24:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:29,001 INFO L472 AbstractCegarLoop]: Abstraction has 1384 states and 1499 transitions. [2018-07-25 13:24:29,001 INFO L473 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-25 13:24:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1499 transitions. [2018-07-25 13:24:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1384 [2018-07-25 13:24:29,011 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:29,011 INFO L354 BasicCegarLoop]: trace histogram [1150, 115, 115, 1, 1, 1] [2018-07-25 13:24:29,011 INFO L415 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:29,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2126407233, now seen corresponding path program 124 times [2018-07-25 13:24:29,012 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 806150 backedges. 0 proven. 799825 refuted. 0 times theorem prover too weak. 6325 trivial. 0 not checked. [2018-07-25 13:24:31,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:31,036 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-25 13:24:31,036 INFO L451 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-25 13:24:31,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-25 13:24:31,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-25 13:24:31,038 INFO L87 Difference]: Start difference. First operand 1384 states and 1499 transitions. Second operand 118 states. [2018-07-25 13:24:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:24:33,522 INFO L93 Difference]: Finished difference Result 1409 states and 1526 transitions. [2018-07-25 13:24:33,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-25 13:24:33,522 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 1383 [2018-07-25 13:24:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:24:33,524 INFO L225 Difference]: With dead ends: 1409 [2018-07-25 13:24:33,524 INFO L226 Difference]: Without dead ends: 1407 [2018-07-25 13:24:33,524 INFO L574 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 [2018-07-25 13:24:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-07-25 13:24:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1396. [2018-07-25 13:24:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2018-07-25 13:24:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1512 transitions. [2018-07-25 13:24:35,770 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1512 transitions. Word has length 1383 [2018-07-25 13:24:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:24:35,771 INFO L472 AbstractCegarLoop]: Abstraction has 1396 states and 1512 transitions. [2018-07-25 13:24:35,771 INFO L473 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-25 13:24:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1512 transitions. [2018-07-25 13:24:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2018-07-25 13:24:35,781 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:24:35,781 INFO L354 BasicCegarLoop]: trace histogram [1160, 116, 116, 1, 1, 1] [2018-07-25 13:24:35,781 INFO L415 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:24:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -408334197, now seen corresponding path program 125 times [2018-07-25 13:24:35,782 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:24:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:24:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 820236 backedges. 0 proven. 813856 refuted. 0 times theorem prover too weak. 6380 trivial. 0 not checked. [2018-07-25 13:24:37,716 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:24:37,716 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-25 13:24:37,717 INFO L451 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-25 13:24:37,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-25 13:24:37,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-25 13:24:37,718 INFO L87 Difference]: Start difference. First operand 1396 states and 1512 transitions. Second operand 119 states. Received shutdown request... [2018-07-25 13:24:38,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-25 13:24:38,718 WARN L541 AbstractCegarLoop]: Verification canceled [2018-07-25 13:24:38,724 WARN L202 ceAbstractionStarter]: Timeout [2018-07-25 13:24:38,725 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.07 01:24:38 BoogieIcfgContainer [2018-07-25 13:24:38,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-25 13:24:38,726 INFO L168 Benchmark]: Toolchain (without parser) took 255703.75 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 378.8 MB. Max. memory is 7.1 GB. [2018-07-25 13:24:38,728 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:24:38,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:24:38,728 INFO L168 Benchmark]: Boogie Preprocessor took 19.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:24:38,729 INFO L168 Benchmark]: RCFGBuilder took 220.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-25 13:24:38,729 INFO L168 Benchmark]: TraceAbstraction took 255420.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 368.2 MB. Max. memory is 7.1 GB. [2018-07-25 13:24:38,738 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 220.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 255420.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 368.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was constructing difference of abstraction (1396states) and interpolant automaton (currently 82 states, 119 states before enhancement), while ReachableStatesComputation was computing reachable states (955 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 255.3s OverallTime, 127 OverallIterations, 1160 TraceHistogramMax, 89.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 516 SDtfs, 13732 SDslu, 9582 SDs, 0 SdLazy, 16714 SolverSat, 316 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7095 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6958 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1396occurred in iteration=126, 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: 78.2s AutomataMinimizationTime, 126 MinimizatonAttempts, 1235 StatesRemovedByMinimization, 116 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 29.1s InterpolantComputationTime, 82054 NumberOfCodeBlocks, 82054 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 81927 ConstructedInterpolants, 0 QuantifiedInterpolants, 228500203 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 127 InterpolantComputations, 2 PerfectInterpolantSequences, 380532/32120352 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-07-25_13-24-38-754.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-25_13-24-38-754.csv Completed graceful shutdown