java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:19:41,912 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:19:41,915 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:19:41,931 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:19:41,931 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:19:41,932 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:19:41,933 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:19:41,938 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:19:41,940 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:19:41,947 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:19:41,948 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:19:41,970 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:19:41,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:19:41,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:19:41,994 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:19:41,994 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:19:41,994 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:19:41,995 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:19:41,995 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:19:41,995 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:19:42,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:19:42,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:19:42,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:19:42,059 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:19:42,060 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:19:42,060 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-07-23 15:19:42,061 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-07-23 15:19:42,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:19:42,109 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:19:42,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:19:42,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:19:42,111 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:19:42,138 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,140 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,151 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,151 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,154 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,156 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,157 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:19:42,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:19:42,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:19:42,160 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:19:42,161 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 23.07 03:19:42" (1/1) ... [2018-07-23 15:19:42,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-23 15:19:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:19:42,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:19:42,391 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:19:42,392 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:42 BoogieIcfgContainer [2018-07-23 15:19:42,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:19:42,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:19:42,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:19:42,397 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:19:42,398 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 23.07 03:19:42" (1/2) ... [2018-07-23 15:19:42,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdcbcb2 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:19:42, skipping insertion in model container [2018-07-23 15:19:42,400 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 23.07 03:19:42" (2/2) ... [2018-07-23 15:19:42,403 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-07-23 15:19:42,414 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:19:42,422 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:19:42,473 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:19:42,474 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:19:42,474 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:19:42,475 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:19:42,475 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:19:42,475 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:19:42,476 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:19:42,476 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:19:42,476 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:19:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:19:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:19:42,502 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,503 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:19:42,503 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-07-23 15:19:42,515 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,586 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:42,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:19:42,591 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:19:42,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:19:42,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:42,605 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 15:19:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,635 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-07-23 15:19:42,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:19:42,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:19:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,648 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:19:42,648 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:19:42,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:19:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-07-23 15:19:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:19:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-07-23 15:19:42,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-07-23 15:19:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,691 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-07-23 15:19:42,692 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:19:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-07-23 15:19:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:19:42,692 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,693 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-07-23 15:19:42,693 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-07-23 15:19:42,694 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,722 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:42,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 15:19:42,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:19:42,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:19:42,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:42,726 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-07-23 15:19:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,740 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-07-23 15:19:42,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:19:42,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-07-23 15:19:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,741 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:19:42,741 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:19:42,743 INFO L573 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 [2018-07-23 15:19:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:19:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:19:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:19:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-07-23 15:19:42,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-07-23 15:19:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,747 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-07-23 15:19:42,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:19:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-07-23 15:19:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:19:42,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,748 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 15:19:42,748 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-07-23 15:19:42,749 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:42,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,783 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:19:42,783 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:19:42,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:19:42,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:42,784 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-07-23 15:19:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,809 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-07-23 15:19:42,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:19:42,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-23 15:19:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,810 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:19:42,810 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:19:42,811 INFO L573 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 [2018-07-23 15:19:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:19:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:19:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:19:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-07-23 15:19:42,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-07-23 15:19:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,814 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-07-23 15:19:42,814 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:19:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-07-23 15:19:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:19:42,815 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,815 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-07-23 15:19:42,815 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-07-23 15:19:42,816 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-23 15:19:42,845 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,845 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:19:42,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:19:42,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:19:42,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:42,849 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-07-23 15:19:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,870 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-07-23 15:19:42,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:19:42,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-07-23 15:19:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,871 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:19:42,871 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:19:42,872 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:19:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-07-23 15:19:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:19:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-07-23 15:19:42,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2018-07-23 15:19:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,877 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-07-23 15:19:42,877 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:19:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-07-23 15:19:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:19:42,878 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,878 INFO L353 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-07-23 15:19:42,879 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 201207191, now seen corresponding path program 3 times [2018-07-23 15:19:42,879 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 15:19:42,914 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,914 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:42,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:19:42,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:19:42,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:42,917 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-07-23 15:19:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:42,933 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2018-07-23 15:19:42,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:19:42,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-23 15:19:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:42,935 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:19:42,935 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:19:42,935 INFO L573 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 [2018-07-23 15:19:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:19:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:19:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:19:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-23 15:19:42,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-07-23 15:19:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:42,942 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-23 15:19:42,942 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:19:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-23 15:19:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:19:42,943 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:42,943 INFO L353 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-07-23 15:19:42,943 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 4 times [2018-07-23 15:19:42,944 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 15:19:42,992 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:42,992 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:19:42,992 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:42,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:42,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:42,993 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-07-23 15:19:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,011 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-07-23 15:19:43,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:43,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-07-23 15:19:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,012 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:19:43,012 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:19:43,013 INFO L573 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 [2018-07-23 15:19:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:19:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:19:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:19:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-07-23 15:19:43,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-07-23 15:19:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,019 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-07-23 15:19:43,019 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-07-23 15:19:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:19:43,020 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,020 INFO L353 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-07-23 15:19:43,020 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 5 times [2018-07-23 15:19:43,021 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-23 15:19:43,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,056 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:19:43,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:19:43,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:19:43,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:43,057 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-07-23 15:19:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,099 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-07-23 15:19:43,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:19:43,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-07-23 15:19:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,101 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:19:43,101 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:19:43,105 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:19:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-07-23 15:19:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:19:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-07-23 15:19:43,118 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2018-07-23 15:19:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,119 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-07-23 15:19:43,119 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:19:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-07-23 15:19:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:19:43,120 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,120 INFO L353 BasicCegarLoop]: trace histogram [12, 3, 3, 1, 1, 1] [2018-07-23 15:19:43,120 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -569669823, now seen corresponding path program 6 times [2018-07-23 15:19:43,121 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-07-23 15:19:43,212 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:43,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:43,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:43,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:43,216 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2018-07-23 15:19:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,246 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-07-23 15:19:43,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:43,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-07-23 15:19:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,247 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:19:43,248 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:19:43,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:19:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-07-23 15:19:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:19:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-07-23 15:19:43,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2018-07-23 15:19:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,259 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-07-23 15:19:43,259 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-07-23 15:19:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:19:43,260 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,261 INFO L353 BasicCegarLoop]: trace histogram [16, 4, 4, 1, 1, 1] [2018-07-23 15:19:43,261 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash -384158805, now seen corresponding path program 7 times [2018-07-23 15:19:43,261 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-07-23 15:19:43,303 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:19:43,306 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:19:43,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:19:43,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:43,307 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2018-07-23 15:19:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,349 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2018-07-23 15:19:43,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:19:43,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-07-23 15:19:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,350 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:19:43,350 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:19:43,351 INFO L573 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 [2018-07-23 15:19:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:19:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:19:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:19:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-07-23 15:19:43,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2018-07-23 15:19:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,361 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-07-23 15:19:43,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:19:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-07-23 15:19:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:19:43,363 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,363 INFO L353 BasicCegarLoop]: trace histogram [20, 4, 4, 1, 1, 1] [2018-07-23 15:19:43,363 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1897277373, now seen corresponding path program 8 times [2018-07-23 15:19:43,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-07-23 15:19:43,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:19:43,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:19:43,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:19:43,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:43,410 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-07-23 15:19:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,432 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-07-23 15:19:43,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:19:43,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-07-23 15:19:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,435 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:19:43,436 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:19:43,436 INFO L573 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 [2018-07-23 15:19:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:19:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:19:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:19:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-07-23 15:19:43,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2018-07-23 15:19:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,458 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-07-23 15:19:43,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:19:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-07-23 15:19:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:19:43,463 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,463 INFO L353 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-07-23 15:19:43,463 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 9 times [2018-07-23 15:19:43,463 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-07-23 15:19:43,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:19:43,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:19:43,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:19:43,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:43,538 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-07-23 15:19:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,564 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-07-23 15:19:43,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:19:43,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-07-23 15:19:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,566 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:19:43,566 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:19:43,567 INFO L573 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 [2018-07-23 15:19:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:19:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:19:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:19:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-07-23 15:19:43,584 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-07-23 15:19:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,584 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-07-23 15:19:43,584 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:19:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-07-23 15:19:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:19:43,587 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,588 INFO L353 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-07-23 15:19:43,588 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 10 times [2018-07-23 15:19:43,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-07-23 15:19:43,667 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:19:43,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:19:43,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:19:43,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:43,670 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2018-07-23 15:19:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,703 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2018-07-23 15:19:43,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:19:43,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-07-23 15:19:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,705 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:19:43,705 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:19:43,706 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:19:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:19:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2018-07-23 15:19:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:19:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-07-23 15:19:43,717 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 39 [2018-07-23 15:19:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,718 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-07-23 15:19:43,718 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:19:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-07-23 15:19:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:19:43,719 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,719 INFO L353 BasicCegarLoop]: trace histogram [35, 5, 5, 1, 1, 1] [2018-07-23 15:19:43,720 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1933961390, now seen corresponding path program 11 times [2018-07-23 15:19:43,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-07-23 15:19:43,775 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,775 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:19:43,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:19:43,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:19:43,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:43,776 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2018-07-23 15:19:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,819 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-07-23 15:19:43,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:19:43,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2018-07-23 15:19:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,821 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:19:43,821 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:19:43,822 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:19:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:19:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-07-23 15:19:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:19:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2018-07-23 15:19:43,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 48 [2018-07-23 15:19:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,846 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2018-07-23 15:19:43,847 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:19:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2018-07-23 15:19:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:19:43,849 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,849 INFO L353 BasicCegarLoop]: trace histogram [42, 6, 6, 1, 1, 1] [2018-07-23 15:19:43,850 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -529480157, now seen corresponding path program 12 times [2018-07-23 15:19:43,850 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 981 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-07-23 15:19:43,926 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:43,926 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:19:43,930 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:19:43,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:19:43,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:43,931 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2018-07-23 15:19:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:43,966 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2018-07-23 15:19:43,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:19:43,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2018-07-23 15:19:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:43,968 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:19:43,968 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:19:43,969 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:19:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:19:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2018-07-23 15:19:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:19:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2018-07-23 15:19:43,994 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 57 [2018-07-23 15:19:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:43,994 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2018-07-23 15:19:43,994 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:19:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2018-07-23 15:19:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:19:43,998 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:43,998 INFO L353 BasicCegarLoop]: trace histogram [49, 7, 7, 1, 1, 1] [2018-07-23 15:19:44,000 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1363198898, now seen corresponding path program 13 times [2018-07-23 15:19:44,001 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 391 proven. 28 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2018-07-23 15:19:44,077 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,077 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:19:44,078 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:19:44,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:19:44,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:44,079 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 10 states. [2018-07-23 15:19:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,105 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2018-07-23 15:19:44,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:19:44,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2018-07-23 15:19:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,107 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:19:44,108 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:19:44,109 INFO L573 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 [2018-07-23 15:19:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:19:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:19:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:19:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-07-23 15:19:44,127 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 66 [2018-07-23 15:19:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,128 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-07-23 15:19:44,128 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:19:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-07-23 15:19:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:19:44,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,130 INFO L353 BasicCegarLoop]: trace histogram [56, 7, 7, 1, 1, 1] [2018-07-23 15:19:44,130 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1515039575, now seen corresponding path program 14 times [2018-07-23 15:19:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-07-23 15:19:44,229 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,229 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:19:44,229 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:19:44,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:19:44,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:44,233 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2018-07-23 15:19:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,263 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2018-07-23 15:19:44,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:19:44,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2018-07-23 15:19:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,265 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:19:44,265 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:19:44,265 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:19:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:19:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2018-07-23 15:19:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:19:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2018-07-23 15:19:44,296 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 73 [2018-07-23 15:19:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,297 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2018-07-23 15:19:44,297 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:19:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2018-07-23 15:19:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:19:44,299 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,299 INFO L353 BasicCegarLoop]: trace histogram [64, 8, 8, 1, 1, 1] [2018-07-23 15:19:44,299 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash -603639725, now seen corresponding path program 15 times [2018-07-23 15:19:44,300 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 575 proven. 36 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2018-07-23 15:19:44,356 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,357 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:19:44,357 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:19:44,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:19:44,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:44,358 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 11 states. [2018-07-23 15:19:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,382 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2018-07-23 15:19:44,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:19:44,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2018-07-23 15:19:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,383 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:19:44,383 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:19:44,384 INFO L573 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 [2018-07-23 15:19:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:19:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:19:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:19:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2018-07-23 15:19:44,401 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 83 [2018-07-23 15:19:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,402 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2018-07-23 15:19:44,402 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:19:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2018-07-23 15:19:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:19:44,406 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,407 INFO L353 BasicCegarLoop]: trace histogram [72, 8, 8, 1, 1, 1] [2018-07-23 15:19:44,407 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1521070467, now seen corresponding path program 16 times [2018-07-23 15:19:44,407 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 708 proven. 45 refuted. 0 times theorem prover too weak. 2443 trivial. 0 not checked. [2018-07-23 15:19:44,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:19:44,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:19:44,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:19:44,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:44,484 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 12 states. [2018-07-23 15:19:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,512 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2018-07-23 15:19:44,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:19:44,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2018-07-23 15:19:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,513 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:19:44,513 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:19:44,522 INFO L573 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 [2018-07-23 15:19:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:19:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:19:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:19:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-07-23 15:19:44,540 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 91 [2018-07-23 15:19:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,541 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-07-23 15:19:44,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:19:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-07-23 15:19:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:19:44,547 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,547 INFO L353 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-07-23 15:19:44,548 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,548 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 17 times [2018-07-23 15:19:44,548 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-07-23 15:19:44,645 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,645 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:19:44,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:19:44,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:19:44,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:44,647 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-07-23 15:19:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,687 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-07-23 15:19:44,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:19:44,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-07-23 15:19:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,689 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:19:44,689 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:19:44,690 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:19:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:19:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-07-23 15:19:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:19:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-07-23 15:19:44,716 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-07-23 15:19:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,717 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-07-23 15:19:44,717 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:19:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-07-23 15:19:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:19:44,719 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,719 INFO L353 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-07-23 15:19:44,720 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 18 times [2018-07-23 15:19:44,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-07-23 15:19:44,832 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:44,832 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:19:44,833 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:19:44,833 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:19:44,833 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:44,834 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-07-23 15:19:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:44,879 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-07-23 15:19:44,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:19:44,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-07-23 15:19:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:44,881 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:19:44,881 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:19:44,882 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:19:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:19:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-07-23 15:19:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:19:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-07-23 15:19:44,907 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-07-23 15:19:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:44,908 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-07-23 15:19:44,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:19:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-07-23 15:19:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:19:44,909 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:44,910 INFO L353 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-07-23 15:19:44,910 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 19 times [2018-07-23 15:19:44,910 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-07-23 15:19:45,043 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:19:45,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:19:45,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:19:45,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:45,045 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-07-23 15:19:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,095 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-07-23 15:19:45,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:19:45,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-07-23 15:19:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,097 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:19:45,097 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:19:45,098 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:19:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:19:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-07-23 15:19:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:19:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-07-23 15:19:45,129 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-07-23 15:19:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,129 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-07-23 15:19:45,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:19:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-07-23 15:19:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:19:45,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,132 INFO L353 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-07-23 15:19:45,132 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 20 times [2018-07-23 15:19:45,132 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-07-23 15:19:45,274 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,275 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:19:45,275 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:19:45,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:19:45,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:45,276 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-07-23 15:19:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,333 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-07-23 15:19:45,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:19:45,334 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-07-23 15:19:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,336 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:19:45,336 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:19:45,337 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:19:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:19:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-07-23 15:19:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:19:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-07-23 15:19:45,389 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-07-23 15:19:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,390 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-07-23 15:19:45,390 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:19:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-07-23 15:19:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:19:45,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,392 INFO L353 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-07-23 15:19:45,392 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 21 times [2018-07-23 15:19:45,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-07-23 15:19:45,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:19:45,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:19:45,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:19:45,576 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:45,576 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-07-23 15:19:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:45,648 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-07-23 15:19:45,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:19:45,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-07-23 15:19:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:45,650 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:19:45,650 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:19:45,651 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:19:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:19:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-07-23 15:19:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:19:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-07-23 15:19:45,698 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-07-23 15:19:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:45,698 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-07-23 15:19:45,698 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:19:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-07-23 15:19:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:19:45,700 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:45,700 INFO L353 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-07-23 15:19:45,701 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 22 times [2018-07-23 15:19:45,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-07-23 15:19:45,933 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:45,933 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:19:45,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:19:45,934 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:19:45,934 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:45,935 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-07-23 15:19:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,001 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-07-23 15:19:46,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:19:46,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-07-23 15:19:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,003 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:19:46,003 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:19:46,004 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:19:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:19:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-07-23 15:19:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:19:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-07-23 15:19:46,050 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-07-23 15:19:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,051 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-07-23 15:19:46,051 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:19:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-07-23 15:19:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:19:46,053 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,053 INFO L353 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-07-23 15:19:46,053 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,053 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 23 times [2018-07-23 15:19:46,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-07-23 15:19:46,229 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:46,229 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:19:46,232 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:19:46,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:19:46,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:46,233 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-07-23 15:19:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,310 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-07-23 15:19:46,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:19:46,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-07-23 15:19:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,312 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:19:46,312 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:19:46,312 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:19:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:19:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-07-23 15:19:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:19:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-07-23 15:19:46,356 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-07-23 15:19:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,357 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-07-23 15:19:46,357 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:19:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-07-23 15:19:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:19:46,359 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,359 INFO L353 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-07-23 15:19:46,359 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 24 times [2018-07-23 15:19:46,359 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-07-23 15:19:46,522 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:46,522 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:19:46,523 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:19:46,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:19:46,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:46,524 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-07-23 15:19:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,601 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-07-23 15:19:46,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:19:46,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-07-23 15:19:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,603 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:19:46,603 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:19:46,604 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:19:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:19:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-07-23 15:19:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:19:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-07-23 15:19:46,654 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-07-23 15:19:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,655 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-07-23 15:19:46,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:19:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-07-23 15:19:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:19:46,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,657 INFO L353 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-07-23 15:19:46,658 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 25 times [2018-07-23 15:19:46,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-07-23 15:19:46,824 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:46,824 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:19:46,824 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:19:46,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:19:46,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:46,825 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-07-23 15:19:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:46,905 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-07-23 15:19:46,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:19:46,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-07-23 15:19:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:46,907 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:19:46,907 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:19:46,908 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:19:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:19:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-07-23 15:19:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:19:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-07-23 15:19:46,961 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-07-23 15:19:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:46,962 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-07-23 15:19:46,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:19:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-07-23 15:19:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:19:46,964 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:46,965 INFO L353 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-07-23 15:19:46,965 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 26 times [2018-07-23 15:19:46,965 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-07-23 15:19:47,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:19:47,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:19:47,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:19:47,127 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:47,127 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-07-23 15:19:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:47,215 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-07-23 15:19:47,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:19:47,216 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-07-23 15:19:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:47,217 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:19:47,217 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:19:47,218 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:19:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:19:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-07-23 15:19:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:19:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-07-23 15:19:47,276 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-07-23 15:19:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:47,277 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-07-23 15:19:47,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:19:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-07-23 15:19:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:19:47,280 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:47,280 INFO L353 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-07-23 15:19:47,280 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:47,280 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 27 times [2018-07-23 15:19:47,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-07-23 15:19:47,488 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,488 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:19:47,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:19:47,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:19:47,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:47,490 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-07-23 15:19:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:47,601 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-07-23 15:19:47,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:19:47,602 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-07-23 15:19:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:47,604 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:19:47,604 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:19:47,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:19:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:19:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-07-23 15:19:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 15:19:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-07-23 15:19:47,684 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-07-23 15:19:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:47,685 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-07-23 15:19:47,685 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:19:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-07-23 15:19:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 15:19:47,689 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:47,689 INFO L353 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-07-23 15:19:47,689 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 28 times [2018-07-23 15:19:47,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-07-23 15:19:47,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:47,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:19:47,971 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:19:47,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:19:47,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:47,972 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-07-23 15:19:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,075 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-07-23 15:19:48,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:19:48,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-07-23 15:19:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,077 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:19:48,077 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 15:19:48,078 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:19:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 15:19:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-07-23 15:19:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 15:19:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-07-23 15:19:48,151 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-07-23 15:19:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,151 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-07-23 15:19:48,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:19:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-07-23 15:19:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 15:19:48,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,154 INFO L353 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-07-23 15:19:48,155 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 29 times [2018-07-23 15:19:48,155 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-07-23 15:19:48,358 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:48,359 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:19:48,359 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:19:48,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:19:48,360 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:48,360 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-07-23 15:19:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,465 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-07-23 15:19:48,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:19:48,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-07-23 15:19:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,467 INFO L225 Difference]: With dead ends: 269 [2018-07-23 15:19:48,468 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 15:19:48,468 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:19:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 15:19:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-07-23 15:19:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-23 15:19:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-07-23 15:19:48,554 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-07-23 15:19:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,554 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-07-23 15:19:48,554 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:19:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-07-23 15:19:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-23 15:19:48,557 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,558 INFO L353 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-07-23 15:19:48,558 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 30 times [2018-07-23 15:19:48,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-07-23 15:19:48,768 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:48,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:19:48,768 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:19:48,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:19:48,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:48,769 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-07-23 15:19:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:48,885 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-07-23 15:19:48,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:19:48,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-07-23 15:19:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:48,887 INFO L225 Difference]: With dead ends: 281 [2018-07-23 15:19:48,888 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 15:19:48,888 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:19:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 15:19:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-07-23 15:19:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-23 15:19:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-07-23 15:19:48,975 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-07-23 15:19:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:48,976 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-07-23 15:19:48,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:19:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-07-23 15:19:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-23 15:19:48,979 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:48,980 INFO L353 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-07-23 15:19:48,980 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 31 times [2018-07-23 15:19:48,980 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-07-23 15:19:49,189 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:49,189 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:19:49,190 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:19:49,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:19:49,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:49,191 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-07-23 15:19:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:49,315 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-07-23 15:19:49,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:19:49,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-07-23 15:19:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:49,318 INFO L225 Difference]: With dead ends: 293 [2018-07-23 15:19:49,318 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 15:19:49,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:19:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 15:19:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-07-23 15:19:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-23 15:19:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-07-23 15:19:49,421 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-07-23 15:19:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:49,422 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-07-23 15:19:49,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:19:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-07-23 15:19:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-23 15:19:49,425 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:49,426 INFO L353 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-07-23 15:19:49,426 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 32 times [2018-07-23 15:19:49,427 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-07-23 15:19:49,736 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:49,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:19:49,737 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:19:49,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:19:49,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:49,738 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-07-23 15:19:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:49,904 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-07-23 15:19:49,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:19:49,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-07-23 15:19:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:49,907 INFO L225 Difference]: With dead ends: 305 [2018-07-23 15:19:49,907 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 15:19:49,908 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:19:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 15:19:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-07-23 15:19:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-23 15:19:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-07-23 15:19:50,101 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-07-23 15:19:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:50,102 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-07-23 15:19:50,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:19:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-07-23 15:19:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-23 15:19:50,107 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:50,107 INFO L353 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-07-23 15:19:50,107 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 33 times [2018-07-23 15:19:50,108 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-07-23 15:19:50,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,363 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:19:50,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:19:50,364 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:19:50,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:50,365 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-07-23 15:19:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:50,523 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-07-23 15:19:50,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:19:50,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-07-23 15:19:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:50,526 INFO L225 Difference]: With dead ends: 317 [2018-07-23 15:19:50,526 INFO L226 Difference]: Without dead ends: 315 [2018-07-23 15:19:50,527 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:19:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-23 15:19:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-07-23 15:19:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-07-23 15:19:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-07-23 15:19:50,650 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-07-23 15:19:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:50,651 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-07-23 15:19:50,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:19:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-07-23 15:19:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-07-23 15:19:50,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:50,655 INFO L353 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-07-23 15:19:50,655 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 34 times [2018-07-23 15:19:50,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-07-23 15:19:50,906 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:50,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:19:50,907 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:19:50,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:19:50,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:50,908 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-07-23 15:19:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:51,082 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-07-23 15:19:51,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:19:51,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-07-23 15:19:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:51,085 INFO L225 Difference]: With dead ends: 329 [2018-07-23 15:19:51,085 INFO L226 Difference]: Without dead ends: 327 [2018-07-23 15:19:51,086 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:19:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-07-23 15:19:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-07-23 15:19:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-07-23 15:19:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-07-23 15:19:51,220 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-07-23 15:19:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:51,221 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-07-23 15:19:51,221 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:19:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-07-23 15:19:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-07-23 15:19:51,225 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:51,226 INFO L353 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-07-23 15:19:51,226 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 35 times [2018-07-23 15:19:51,227 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-07-23 15:19:51,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:51,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:19:51,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:19:51,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:19:51,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:51,491 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-07-23 15:19:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:51,653 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-07-23 15:19:51,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:19:51,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-07-23 15:19:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:51,656 INFO L225 Difference]: With dead ends: 341 [2018-07-23 15:19:51,656 INFO L226 Difference]: Without dead ends: 339 [2018-07-23 15:19:51,657 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:19:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-07-23 15:19:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-07-23 15:19:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-07-23 15:19:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-07-23 15:19:51,813 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-07-23 15:19:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:51,814 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-07-23 15:19:51,814 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:19:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-07-23 15:19:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-07-23 15:19:51,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:51,818 INFO L353 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-07-23 15:19:51,818 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 36 times [2018-07-23 15:19:51,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-07-23 15:19:52,310 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:52,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:19:52,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:19:52,311 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:19:52,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:52,312 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-07-23 15:19:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:52,504 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-07-23 15:19:52,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:19:52,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-07-23 15:19:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:52,507 INFO L225 Difference]: With dead ends: 353 [2018-07-23 15:19:52,507 INFO L226 Difference]: Without dead ends: 351 [2018-07-23 15:19:52,508 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:19:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-07-23 15:19:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-07-23 15:19:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-07-23 15:19:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-07-23 15:19:52,656 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-07-23 15:19:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:52,656 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-07-23 15:19:52,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:19:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-07-23 15:19:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-07-23 15:19:52,661 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:52,661 INFO L353 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-07-23 15:19:52,661 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 37 times [2018-07-23 15:19:52,661 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-07-23 15:19:52,979 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:52,979 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:19:52,980 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:19:52,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:19:52,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:52,981 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-07-23 15:19:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:53,187 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-07-23 15:19:53,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:19:53,188 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-07-23 15:19:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:53,191 INFO L225 Difference]: With dead ends: 365 [2018-07-23 15:19:53,191 INFO L226 Difference]: Without dead ends: 363 [2018-07-23 15:19:53,192 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:19:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-07-23 15:19:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-07-23 15:19:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-07-23 15:19:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-07-23 15:19:53,356 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-07-23 15:19:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:53,357 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-07-23 15:19:53,357 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:19:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-07-23 15:19:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-07-23 15:19:53,361 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:53,361 INFO L353 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-07-23 15:19:53,361 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 38 times [2018-07-23 15:19:53,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-07-23 15:19:53,665 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:53,665 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:19:53,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:19:53,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:19:53,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:19:53,667 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-07-23 15:19:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:53,882 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-07-23 15:19:53,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:19:53,882 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-07-23 15:19:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:53,885 INFO L225 Difference]: With dead ends: 377 [2018-07-23 15:19:53,885 INFO L226 Difference]: Without dead ends: 375 [2018-07-23 15:19:53,886 INFO L573 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 [2018-07-23 15:19:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-07-23 15:19:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-07-23 15:19:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-23 15:19:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-07-23 15:19:54,077 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-07-23 15:19:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:54,077 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-07-23 15:19:54,078 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:19:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-07-23 15:19:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-23 15:19:54,083 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:54,083 INFO L353 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-07-23 15:19:54,083 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 39 times [2018-07-23 15:19:54,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-07-23 15:19:54,420 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:54,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:19:54,421 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:19:54,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:19:54,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:19:54,422 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-07-23 15:19:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:54,689 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-07-23 15:19:54,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:19:54,690 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-07-23 15:19:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:54,692 INFO L225 Difference]: With dead ends: 389 [2018-07-23 15:19:54,693 INFO L226 Difference]: Without dead ends: 387 [2018-07-23 15:19:54,694 INFO L573 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 [2018-07-23 15:19:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-07-23 15:19:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-07-23 15:19:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-07-23 15:19:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-07-23 15:19:54,877 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-07-23 15:19:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:54,878 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-07-23 15:19:54,878 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:19:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-07-23 15:19:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-07-23 15:19:54,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:54,884 INFO L353 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-07-23 15:19:54,884 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 40 times [2018-07-23 15:19:54,884 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-07-23 15:19:55,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:55,197 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:19:55,197 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:19:55,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:19:55,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:19:55,198 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-07-23 15:19:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:55,447 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-07-23 15:19:55,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:19:55,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-07-23 15:19:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:55,450 INFO L225 Difference]: With dead ends: 401 [2018-07-23 15:19:55,451 INFO L226 Difference]: Without dead ends: 399 [2018-07-23 15:19:55,452 INFO L573 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 [2018-07-23 15:19:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-07-23 15:19:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-07-23 15:19:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-07-23 15:19:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-07-23 15:19:55,637 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-07-23 15:19:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:55,638 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-07-23 15:19:55,638 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:19:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-07-23 15:19:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-23 15:19:55,644 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:55,644 INFO L353 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-07-23 15:19:55,644 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 41 times [2018-07-23 15:19:55,645 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-07-23 15:19:56,012 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:56,012 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:19:56,013 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:19:56,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:19:56,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:19:56,015 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-07-23 15:19:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:56,293 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-07-23 15:19:56,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:19:56,293 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-07-23 15:19:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:56,296 INFO L225 Difference]: With dead ends: 413 [2018-07-23 15:19:56,297 INFO L226 Difference]: Without dead ends: 411 [2018-07-23 15:19:56,299 INFO L573 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 [2018-07-23 15:19:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-07-23 15:19:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-07-23 15:19:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-07-23 15:19:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-07-23 15:19:56,501 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-07-23 15:19:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:56,502 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-07-23 15:19:56,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:19:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-07-23 15:19:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-07-23 15:19:56,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:56,505 INFO L353 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-07-23 15:19:56,505 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 42 times [2018-07-23 15:19:56,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-07-23 15:19:56,945 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:56,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:19:56,946 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:19:56,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:19:56,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:19:56,948 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-07-23 15:19:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:57,247 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-07-23 15:19:57,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:19:57,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-07-23 15:19:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:57,250 INFO L225 Difference]: With dead ends: 425 [2018-07-23 15:19:57,251 INFO L226 Difference]: Without dead ends: 423 [2018-07-23 15:19:57,252 INFO L573 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 [2018-07-23 15:19:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-07-23 15:19:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-07-23 15:19:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-07-23 15:19:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-07-23 15:19:57,493 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-07-23 15:19:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:57,494 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-07-23 15:19:57,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:19:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-07-23 15:19:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-07-23 15:19:57,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:57,498 INFO L353 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-07-23 15:19:57,498 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 43 times [2018-07-23 15:19:57,499 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-07-23 15:19:57,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:57,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:19:57,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:19:57,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:19:57,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:19:57,910 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-07-23 15:19:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:58,174 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-07-23 15:19:58,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:19:58,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-07-23 15:19:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:58,177 INFO L225 Difference]: With dead ends: 437 [2018-07-23 15:19:58,177 INFO L226 Difference]: Without dead ends: 435 [2018-07-23 15:19:58,178 INFO L573 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 [2018-07-23 15:19:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-07-23 15:19:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-07-23 15:19:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-07-23 15:19:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-07-23 15:19:58,400 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-07-23 15:19:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:58,401 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-07-23 15:19:58,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:19:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-07-23 15:19:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-07-23 15:19:58,403 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:58,404 INFO L353 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-07-23 15:19:58,404 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 44 times [2018-07-23 15:19:58,404 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-07-23 15:19:58,745 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:58,745 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:19:58,746 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:19:58,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:19:58,747 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:19:58,747 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-07-23 15:19:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:59,017 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-07-23 15:19:59,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:19:59,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-07-23 15:19:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:59,021 INFO L225 Difference]: With dead ends: 449 [2018-07-23 15:19:59,021 INFO L226 Difference]: Without dead ends: 447 [2018-07-23 15:19:59,022 INFO L573 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 [2018-07-23 15:19:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-07-23 15:19:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-07-23 15:19:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-07-23 15:19:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-07-23 15:19:59,268 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-07-23 15:19:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:59,269 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-07-23 15:19:59,269 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:19:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-07-23 15:19:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-07-23 15:19:59,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:59,272 INFO L353 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-07-23 15:19:59,272 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 45 times [2018-07-23 15:19:59,273 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-07-23 15:19:59,652 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:59,653 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:19:59,653 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:19:59,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:19:59,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:19:59,655 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-07-23 15:19:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:59,965 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-07-23 15:19:59,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:19:59,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-07-23 15:19:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:59,969 INFO L225 Difference]: With dead ends: 461 [2018-07-23 15:19:59,969 INFO L226 Difference]: Without dead ends: 459 [2018-07-23 15:19:59,970 INFO L573 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 [2018-07-23 15:19:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-07-23 15:20:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-07-23 15:20:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-07-23 15:20:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-07-23 15:20:00,251 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-07-23 15:20:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:00,251 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-07-23 15:20:00,251 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:20:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-07-23 15:20:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-07-23 15:20:00,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:00,254 INFO L353 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-07-23 15:20:00,255 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:00,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 46 times [2018-07-23 15:20:00,255 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-07-23 15:20:00,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:00,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:20:00,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:20:00,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:20:00,611 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:20:00,612 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-07-23 15:20:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:00,916 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-07-23 15:20:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:20:00,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-07-23 15:20:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:00,919 INFO L225 Difference]: With dead ends: 473 [2018-07-23 15:20:00,920 INFO L226 Difference]: Without dead ends: 471 [2018-07-23 15:20:00,921 INFO L573 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 [2018-07-23 15:20:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-07-23 15:20:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-07-23 15:20:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-07-23 15:20:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-07-23 15:20:01,137 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-07-23 15:20:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:01,138 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-07-23 15:20:01,138 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:20:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-07-23 15:20:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-07-23 15:20:01,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:01,141 INFO L353 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-07-23 15:20:01,142 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 47 times [2018-07-23 15:20:01,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-07-23 15:20:01,486 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:01,486 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:20:01,487 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:20:01,487 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:20:01,487 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:20:01,488 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-07-23 15:20:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:01,747 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-07-23 15:20:01,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:20:01,747 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-07-23 15:20:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:01,750 INFO L225 Difference]: With dead ends: 485 [2018-07-23 15:20:01,750 INFO L226 Difference]: Without dead ends: 483 [2018-07-23 15:20:01,751 INFO L573 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 [2018-07-23 15:20:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-07-23 15:20:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-07-23 15:20:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-07-23 15:20:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-07-23 15:20:01,992 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-07-23 15:20:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:01,993 INFO L471 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-07-23 15:20:01,993 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:20:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-07-23 15:20:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-07-23 15:20:01,996 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:01,996 INFO L353 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-07-23 15:20:01,997 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 48 times [2018-07-23 15:20:01,997 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-07-23 15:20:02,434 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:02,434 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:20:02,435 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:20:02,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:20:02,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:20:02,436 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-07-23 15:20:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:02,837 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-07-23 15:20:02,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:20:02,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-07-23 15:20:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:02,840 INFO L225 Difference]: With dead ends: 497 [2018-07-23 15:20:02,840 INFO L226 Difference]: Without dead ends: 495 [2018-07-23 15:20:02,841 INFO L573 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 [2018-07-23 15:20:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-07-23 15:20:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-07-23 15:20:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-07-23 15:20:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-07-23 15:20:03,144 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-07-23 15:20:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:03,144 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-07-23 15:20:03,145 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:20:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-07-23 15:20:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-07-23 15:20:03,148 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:03,148 INFO L353 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-07-23 15:20:03,148 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 49 times [2018-07-23 15:20:03,149 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-07-23 15:20:03,533 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:03,533 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:20:03,533 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:20:03,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:20:03,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:20:03,535 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-07-23 15:20:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:03,794 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-07-23 15:20:03,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:20:03,794 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-07-23 15:20:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:03,796 INFO L225 Difference]: With dead ends: 509 [2018-07-23 15:20:03,796 INFO L226 Difference]: Without dead ends: 507 [2018-07-23 15:20:03,797 INFO L573 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 [2018-07-23 15:20:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-07-23 15:20:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-07-23 15:20:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-07-23 15:20:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-07-23 15:20:04,045 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-07-23 15:20:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:04,045 INFO L471 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-07-23 15:20:04,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:20:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-07-23 15:20:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-07-23 15:20:04,051 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:04,051 INFO L353 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-07-23 15:20:04,051 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 50 times [2018-07-23 15:20:04,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-07-23 15:20:04,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:04,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:20:04,455 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:20:04,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:20:04,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:20:04,456 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-07-23 15:20:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:04,799 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-07-23 15:20:04,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:20:04,799 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-07-23 15:20:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:04,803 INFO L225 Difference]: With dead ends: 521 [2018-07-23 15:20:04,803 INFO L226 Difference]: Without dead ends: 519 [2018-07-23 15:20:04,804 INFO L573 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 [2018-07-23 15:20:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-07-23 15:20:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-07-23 15:20:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-07-23 15:20:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-07-23 15:20:05,059 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-07-23 15:20:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:05,059 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-07-23 15:20:05,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:20:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-07-23 15:20:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-07-23 15:20:05,062 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:05,063 INFO L353 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-07-23 15:20:05,063 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 51 times [2018-07-23 15:20:05,063 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-07-23 15:20:05,520 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:05,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:20:05,521 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:20:05,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:20:05,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:20:05,522 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-07-23 15:20:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:05,922 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-07-23 15:20:05,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:20:05,923 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-07-23 15:20:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:05,925 INFO L225 Difference]: With dead ends: 533 [2018-07-23 15:20:05,925 INFO L226 Difference]: Without dead ends: 531 [2018-07-23 15:20:05,925 INFO L573 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 [2018-07-23 15:20:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-07-23 15:20:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-07-23 15:20:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-07-23 15:20:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-07-23 15:20:06,166 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-07-23 15:20:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:06,167 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-07-23 15:20:06,167 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:20:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-07-23 15:20:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-07-23 15:20:06,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:06,170 INFO L353 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-07-23 15:20:06,170 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 52 times [2018-07-23 15:20:06,171 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-07-23 15:20:06,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:06,651 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:20:06,652 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:20:06,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:20:06,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:20:06,653 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-07-23 15:20:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:07,107 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-07-23 15:20:07,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:20:07,107 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-07-23 15:20:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:07,111 INFO L225 Difference]: With dead ends: 545 [2018-07-23 15:20:07,111 INFO L226 Difference]: Without dead ends: 543 [2018-07-23 15:20:07,112 INFO L573 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 [2018-07-23 15:20:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-07-23 15:20:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-07-23 15:20:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-23 15:20:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-07-23 15:20:07,376 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-07-23 15:20:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:07,377 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-07-23 15:20:07,377 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:20:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-07-23 15:20:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-07-23 15:20:07,379 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:07,379 INFO L353 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-07-23 15:20:07,379 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 53 times [2018-07-23 15:20:07,380 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-07-23 15:20:07,889 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:07,889 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:20:07,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:20:07,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:20:07,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:20:07,891 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-07-23 15:20:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:08,304 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-07-23 15:20:08,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:20:08,304 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-07-23 15:20:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:08,307 INFO L225 Difference]: With dead ends: 557 [2018-07-23 15:20:08,307 INFO L226 Difference]: Without dead ends: 555 [2018-07-23 15:20:08,308 INFO L573 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 [2018-07-23 15:20:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-07-23 15:20:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-07-23 15:20:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-07-23 15:20:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-07-23 15:20:08,612 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-07-23 15:20:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:08,612 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-07-23 15:20:08,612 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:20:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-07-23 15:20:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-07-23 15:20:08,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:08,615 INFO L353 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-07-23 15:20:08,616 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:08,616 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 54 times [2018-07-23 15:20:08,616 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-07-23 15:20:09,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:09,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:20:09,125 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:20:09,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:20:09,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:20:09,125 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-07-23 15:20:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:09,467 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-07-23 15:20:09,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:20:09,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-07-23 15:20:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:09,470 INFO L225 Difference]: With dead ends: 569 [2018-07-23 15:20:09,470 INFO L226 Difference]: Without dead ends: 567 [2018-07-23 15:20:09,471 INFO L573 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 [2018-07-23 15:20:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-07-23 15:20:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-07-23 15:20:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-07-23 15:20:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-07-23 15:20:09,798 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-07-23 15:20:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:09,798 INFO L471 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-07-23 15:20:09,798 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:20:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-07-23 15:20:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-07-23 15:20:09,801 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:09,801 INFO L353 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-07-23 15:20:09,801 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 55 times [2018-07-23 15:20:09,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-07-23 15:20:10,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:10,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:20:10,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:20:10,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:20:10,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:20:10,287 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-07-23 15:20:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:10,707 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-07-23 15:20:10,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:20:10,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-07-23 15:20:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:10,710 INFO L225 Difference]: With dead ends: 581 [2018-07-23 15:20:10,710 INFO L226 Difference]: Without dead ends: 579 [2018-07-23 15:20:10,711 INFO L573 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 [2018-07-23 15:20:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-07-23 15:20:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-07-23 15:20:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-07-23 15:20:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-07-23 15:20:11,012 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-07-23 15:20:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:11,013 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-07-23 15:20:11,013 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:20:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-07-23 15:20:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-07-23 15:20:11,016 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:11,017 INFO L353 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-07-23 15:20:11,017 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 56 times [2018-07-23 15:20:11,017 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-07-23 15:20:11,472 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:11,472 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:20:11,473 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:20:11,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:20:11,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:20:11,474 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-07-23 15:20:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:11,828 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-07-23 15:20:11,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:20:11,828 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-07-23 15:20:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:11,831 INFO L225 Difference]: With dead ends: 593 [2018-07-23 15:20:11,831 INFO L226 Difference]: Without dead ends: 591 [2018-07-23 15:20:11,832 INFO L573 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 [2018-07-23 15:20:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-07-23 15:20:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-07-23 15:20:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-07-23 15:20:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-07-23 15:20:12,155 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-07-23 15:20:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:12,155 INFO L471 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-07-23 15:20:12,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:20:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-07-23 15:20:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-07-23 15:20:12,158 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:12,158 INFO L353 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-07-23 15:20:12,159 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 57 times [2018-07-23 15:20:12,159 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-07-23 15:20:12,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:12,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:20:12,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:20:12,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:20:12,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:20:12,547 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-07-23 15:20:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:12,901 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-07-23 15:20:12,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:20:12,901 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-07-23 15:20:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:12,904 INFO L225 Difference]: With dead ends: 605 [2018-07-23 15:20:12,904 INFO L226 Difference]: Without dead ends: 603 [2018-07-23 15:20:12,905 INFO L573 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 [2018-07-23 15:20:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-07-23 15:20:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-07-23 15:20:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-07-23 15:20:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-07-23 15:20:13,242 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-07-23 15:20:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:13,242 INFO L471 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-07-23 15:20:13,242 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:20:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-07-23 15:20:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-07-23 15:20:13,245 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:13,245 INFO L353 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-07-23 15:20:13,246 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 58 times [2018-07-23 15:20:13,246 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-07-23 15:20:13,624 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:13,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:20:13,625 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:20:13,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:20:13,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:20:13,625 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-07-23 15:20:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:13,990 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-07-23 15:20:13,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:20:13,991 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-07-23 15:20:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:13,993 INFO L225 Difference]: With dead ends: 617 [2018-07-23 15:20:13,993 INFO L226 Difference]: Without dead ends: 615 [2018-07-23 15:20:13,993 INFO L573 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 [2018-07-23 15:20:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-07-23 15:20:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-07-23 15:20:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-07-23 15:20:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-07-23 15:20:14,351 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-07-23 15:20:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:14,351 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-07-23 15:20:14,351 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:20:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-07-23 15:20:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-07-23 15:20:14,355 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:14,355 INFO L353 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-07-23 15:20:14,355 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:14,356 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 59 times [2018-07-23 15:20:14,356 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-07-23 15:20:14,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:14,880 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:20:14,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:20:14,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:20:14,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:20:14,881 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-07-23 15:20:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:15,233 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-07-23 15:20:15,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:20:15,233 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-07-23 15:20:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:15,235 INFO L225 Difference]: With dead ends: 629 [2018-07-23 15:20:15,235 INFO L226 Difference]: Without dead ends: 627 [2018-07-23 15:20:15,236 INFO L573 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 [2018-07-23 15:20:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-07-23 15:20:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-07-23 15:20:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-07-23 15:20:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-07-23 15:20:15,550 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-07-23 15:20:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:15,550 INFO L471 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-07-23 15:20:15,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:20:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-07-23 15:20:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-07-23 15:20:15,554 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:15,554 INFO L353 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-07-23 15:20:15,554 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:15,554 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 60 times [2018-07-23 15:20:15,555 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-07-23 15:20:15,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:15,975 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:20:15,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:20:15,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:20:15,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:20:15,977 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-07-23 15:20:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:16,375 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-07-23 15:20:16,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:20:16,375 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-07-23 15:20:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:16,379 INFO L225 Difference]: With dead ends: 641 [2018-07-23 15:20:16,379 INFO L226 Difference]: Without dead ends: 639 [2018-07-23 15:20:16,380 INFO L573 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 [2018-07-23 15:20:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-07-23 15:20:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-07-23 15:20:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-07-23 15:20:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-07-23 15:20:16,707 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-07-23 15:20:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:16,707 INFO L471 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-07-23 15:20:16,707 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:20:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-07-23 15:20:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-07-23 15:20:16,710 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:16,710 INFO L353 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-07-23 15:20:16,710 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 61 times [2018-07-23 15:20:16,710 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-07-23 15:20:17,097 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:17,097 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:20:17,097 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:20:17,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:20:17,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:20:17,099 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-07-23 15:20:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:17,547 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-07-23 15:20:17,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:20:17,547 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-07-23 15:20:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:17,550 INFO L225 Difference]: With dead ends: 653 [2018-07-23 15:20:17,550 INFO L226 Difference]: Without dead ends: 651 [2018-07-23 15:20:17,551 INFO L573 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 [2018-07-23 15:20:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-07-23 15:20:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-07-23 15:20:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-07-23 15:20:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-07-23 15:20:17,914 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-07-23 15:20:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:17,915 INFO L471 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-07-23 15:20:17,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:20:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-07-23 15:20:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-07-23 15:20:17,918 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:17,919 INFO L353 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-07-23 15:20:17,919 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 62 times [2018-07-23 15:20:17,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-07-23 15:20:18,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:18,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:20:18,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:20:18,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:20:18,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:20:18,354 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-07-23 15:20:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:18,746 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-07-23 15:20:18,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:20:18,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-07-23 15:20:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:18,748 INFO L225 Difference]: With dead ends: 665 [2018-07-23 15:20:18,748 INFO L226 Difference]: Without dead ends: 663 [2018-07-23 15:20:18,749 INFO L573 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 [2018-07-23 15:20:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-07-23 15:20:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-07-23 15:20:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-07-23 15:20:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-07-23 15:20:19,115 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-07-23 15:20:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:19,115 INFO L471 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-07-23 15:20:19,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:20:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-07-23 15:20:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-07-23 15:20:19,118 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:19,119 INFO L353 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-07-23 15:20:19,119 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 63 times [2018-07-23 15:20:19,119 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-07-23 15:20:19,549 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:19,549 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:20:19,550 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:20:19,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:20:19,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:20:19,551 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-07-23 15:20:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:20,026 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-07-23 15:20:20,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:20:20,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-07-23 15:20:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:20,028 INFO L225 Difference]: With dead ends: 677 [2018-07-23 15:20:20,028 INFO L226 Difference]: Without dead ends: 675 [2018-07-23 15:20:20,029 INFO L573 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 [2018-07-23 15:20:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-07-23 15:20:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-07-23 15:20:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-07-23 15:20:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-07-23 15:20:20,445 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-07-23 15:20:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:20,446 INFO L471 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-07-23 15:20:20,446 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:20:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-07-23 15:20:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-07-23 15:20:20,453 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:20,453 INFO L353 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-07-23 15:20:20,453 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 64 times [2018-07-23 15:20:20,454 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-07-23 15:20:21,060 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:21,060 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:20:21,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:20:21,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:20:21,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:20:21,061 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-07-23 15:20:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:21,506 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-07-23 15:20:21,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:20:21,506 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-07-23 15:20:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:21,508 INFO L225 Difference]: With dead ends: 689 [2018-07-23 15:20:21,508 INFO L226 Difference]: Without dead ends: 687 [2018-07-23 15:20:21,509 INFO L573 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 [2018-07-23 15:20:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-07-23 15:20:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-07-23 15:20:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-07-23 15:20:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-07-23 15:20:21,922 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-07-23 15:20:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:21,922 INFO L471 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-07-23 15:20:21,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:20:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-07-23 15:20:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-07-23 15:20:21,925 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:21,925 INFO L353 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-07-23 15:20:21,926 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 65 times [2018-07-23 15:20:21,926 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-07-23 15:20:22,361 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:22,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:20:22,362 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:20:22,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:20:22,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:20:22,363 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-07-23 15:20:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:22,823 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-07-23 15:20:22,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:20:22,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-07-23 15:20:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:22,826 INFO L225 Difference]: With dead ends: 701 [2018-07-23 15:20:22,826 INFO L226 Difference]: Without dead ends: 699 [2018-07-23 15:20:22,827 INFO L573 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 [2018-07-23 15:20:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-07-23 15:20:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-07-23 15:20:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-07-23 15:20:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-07-23 15:20:23,235 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-07-23 15:20:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:23,235 INFO L471 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-07-23 15:20:23,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:20:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-07-23 15:20:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-07-23 15:20:23,239 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:23,239 INFO L353 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-07-23 15:20:23,239 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 66 times [2018-07-23 15:20:23,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-07-23 15:20:23,757 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:23,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:20:23,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:20:23,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:20:23,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:20:23,758 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-07-23 15:20:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:24,266 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-07-23 15:20:24,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:20:24,266 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-07-23 15:20:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:24,269 INFO L225 Difference]: With dead ends: 713 [2018-07-23 15:20:24,269 INFO L226 Difference]: Without dead ends: 711 [2018-07-23 15:20:24,269 INFO L573 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 [2018-07-23 15:20:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-07-23 15:20:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-07-23 15:20:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-07-23 15:20:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-07-23 15:20:24,715 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-07-23 15:20:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:24,715 INFO L471 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-07-23 15:20:24,715 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:20:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-07-23 15:20:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-07-23 15:20:24,719 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:24,719 INFO L353 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-07-23 15:20:24,719 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 67 times [2018-07-23 15:20:24,719 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-07-23 15:20:25,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:25,176 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:20:25,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:20:25,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:20:25,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:20:25,177 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-07-23 15:20:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:25,706 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-07-23 15:20:25,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:20:25,706 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-07-23 15:20:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:25,708 INFO L225 Difference]: With dead ends: 725 [2018-07-23 15:20:25,708 INFO L226 Difference]: Without dead ends: 723 [2018-07-23 15:20:25,709 INFO L573 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 [2018-07-23 15:20:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-07-23 15:20:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-07-23 15:20:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-07-23 15:20:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-07-23 15:20:26,192 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-07-23 15:20:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:26,193 INFO L471 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-07-23 15:20:26,193 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:20:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-07-23 15:20:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-07-23 15:20:26,196 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:26,196 INFO L353 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-07-23 15:20:26,196 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 68 times [2018-07-23 15:20:26,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-07-23 15:20:26,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:26,756 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:20:26,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:20:26,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:20:26,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:20:26,757 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-07-23 15:20:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:27,489 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-07-23 15:20:27,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:20:27,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-07-23 15:20:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:27,491 INFO L225 Difference]: With dead ends: 737 [2018-07-23 15:20:27,492 INFO L226 Difference]: Without dead ends: 735 [2018-07-23 15:20:27,492 INFO L573 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 [2018-07-23 15:20:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-07-23 15:20:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-07-23 15:20:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-07-23 15:20:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-07-23 15:20:27,969 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-07-23 15:20:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:27,969 INFO L471 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-07-23 15:20:27,969 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:20:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-07-23 15:20:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-07-23 15:20:27,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:27,973 INFO L353 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-07-23 15:20:27,973 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 69 times [2018-07-23 15:20:27,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-07-23 15:20:28,462 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:28,462 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:20:28,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:20:28,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:20:28,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:20:28,464 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-07-23 15:20:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:28,983 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-07-23 15:20:28,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:20:28,983 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-07-23 15:20:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:28,986 INFO L225 Difference]: With dead ends: 749 [2018-07-23 15:20:28,986 INFO L226 Difference]: Without dead ends: 747 [2018-07-23 15:20:28,987 INFO L573 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 [2018-07-23 15:20:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-07-23 15:20:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-07-23 15:20:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-07-23 15:20:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-07-23 15:20:29,469 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-07-23 15:20:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:29,469 INFO L471 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-07-23 15:20:29,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:20:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-07-23 15:20:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-07-23 15:20:29,473 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:29,474 INFO L353 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-07-23 15:20:29,474 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 70 times [2018-07-23 15:20:29,474 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-07-23 15:20:30,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:30,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:20:30,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:20:30,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:20:30,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:20:30,036 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-07-23 15:20:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:30,586 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-07-23 15:20:30,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:20:30,586 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-07-23 15:20:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:30,589 INFO L225 Difference]: With dead ends: 761 [2018-07-23 15:20:30,589 INFO L226 Difference]: Without dead ends: 759 [2018-07-23 15:20:30,589 INFO L573 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 [2018-07-23 15:20:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-07-23 15:20:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-07-23 15:20:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-07-23 15:20:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-07-23 15:20:31,076 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-07-23 15:20:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:31,076 INFO L471 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-07-23 15:20:31,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:20:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-07-23 15:20:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-07-23 15:20:31,080 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:31,080 INFO L353 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-07-23 15:20:31,080 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 71 times [2018-07-23 15:20:31,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-07-23 15:20:31,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:31,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:20:31,608 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:20:31,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:20:31,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:20:31,609 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-07-23 15:20:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:32,172 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-07-23 15:20:32,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:20:32,172 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-07-23 15:20:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:32,175 INFO L225 Difference]: With dead ends: 773 [2018-07-23 15:20:32,175 INFO L226 Difference]: Without dead ends: 771 [2018-07-23 15:20:32,176 INFO L573 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 [2018-07-23 15:20:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-07-23 15:20:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-07-23 15:20:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-07-23 15:20:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-07-23 15:20:32,682 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-07-23 15:20:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:32,682 INFO L471 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-07-23 15:20:32,682 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:20:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-07-23 15:20:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-07-23 15:20:32,686 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:32,686 INFO L353 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-07-23 15:20:32,686 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 72 times [2018-07-23 15:20:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-07-23 15:20:33,260 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:33,260 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:20:33,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:20:33,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:20:33,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:20:33,261 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-07-23 15:20:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:33,850 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-07-23 15:20:33,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:20:33,850 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-07-23 15:20:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:33,852 INFO L225 Difference]: With dead ends: 785 [2018-07-23 15:20:33,852 INFO L226 Difference]: Without dead ends: 783 [2018-07-23 15:20:33,853 INFO L573 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 [2018-07-23 15:20:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-07-23 15:20:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-07-23 15:20:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-07-23 15:20:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-07-23 15:20:34,368 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-07-23 15:20:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:34,368 INFO L471 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-07-23 15:20:34,368 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:20:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-07-23 15:20:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-07-23 15:20:34,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:34,372 INFO L353 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-07-23 15:20:34,372 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 73 times [2018-07-23 15:20:34,373 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-07-23 15:20:34,972 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:34,972 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:20:34,973 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:20:34,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:20:34,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:20:34,974 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-07-23 15:20:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:35,632 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-07-23 15:20:35,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:20:35,632 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-07-23 15:20:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:35,635 INFO L225 Difference]: With dead ends: 797 [2018-07-23 15:20:35,635 INFO L226 Difference]: Without dead ends: 795 [2018-07-23 15:20:35,636 INFO L573 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 [2018-07-23 15:20:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-07-23 15:20:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-07-23 15:20:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-07-23 15:20:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-07-23 15:20:36,172 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-07-23 15:20:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:36,172 INFO L471 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-07-23 15:20:36,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:20:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-07-23 15:20:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-07-23 15:20:36,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:36,177 INFO L353 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-07-23 15:20:36,177 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 74 times [2018-07-23 15:20:36,177 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-07-23 15:20:36,788 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:36,789 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:20:36,789 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:20:36,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:20:36,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:20:36,790 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-07-23 15:20:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:37,485 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-07-23 15:20:37,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:20:37,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-07-23 15:20:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:37,488 INFO L225 Difference]: With dead ends: 809 [2018-07-23 15:20:37,488 INFO L226 Difference]: Without dead ends: 807 [2018-07-23 15:20:37,489 INFO L573 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 [2018-07-23 15:20:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-07-23 15:20:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-07-23 15:20:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-07-23 15:20:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-07-23 15:20:38,050 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-07-23 15:20:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:38,050 INFO L471 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-07-23 15:20:38,050 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:20:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-07-23 15:20:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-07-23 15:20:38,054 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:38,054 INFO L353 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-07-23 15:20:38,055 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 75 times [2018-07-23 15:20:38,055 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-07-23 15:20:38,647 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:38,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:20:38,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:20:38,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:20:38,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:20:38,648 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-07-23 15:20:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:39,304 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-07-23 15:20:39,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:20:39,304 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-07-23 15:20:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:39,306 INFO L225 Difference]: With dead ends: 821 [2018-07-23 15:20:39,306 INFO L226 Difference]: Without dead ends: 819 [2018-07-23 15:20:39,307 INFO L573 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 [2018-07-23 15:20:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-07-23 15:20:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-07-23 15:20:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-07-23 15:20:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-07-23 15:20:39,882 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-07-23 15:20:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:39,882 INFO L471 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-07-23 15:20:39,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:20:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-07-23 15:20:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-07-23 15:20:39,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:39,887 INFO L353 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-07-23 15:20:39,887 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 76 times [2018-07-23 15:20:39,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-07-23 15:20:40,582 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:40,582 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:20:40,583 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:20:40,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:20:40,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:20:40,584 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-07-23 15:20:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:41,218 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-07-23 15:20:41,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:20:41,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-07-23 15:20:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:41,221 INFO L225 Difference]: With dead ends: 833 [2018-07-23 15:20:41,221 INFO L226 Difference]: Without dead ends: 831 [2018-07-23 15:20:41,222 INFO L573 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 [2018-07-23 15:20:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-07-23 15:20:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-07-23 15:20:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-07-23 15:20:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-07-23 15:20:41,820 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-07-23 15:20:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:41,821 INFO L471 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-07-23 15:20:41,821 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:20:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-07-23 15:20:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-07-23 15:20:41,825 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:41,825 INFO L353 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-07-23 15:20:41,825 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 77 times [2018-07-23 15:20:41,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-07-23 15:20:42,478 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:42,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:20:42,479 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:20:42,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:20:42,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:20:42,480 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-07-23 15:20:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:43,197 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-07-23 15:20:43,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:20:43,197 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-07-23 15:20:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:43,201 INFO L225 Difference]: With dead ends: 845 [2018-07-23 15:20:43,201 INFO L226 Difference]: Without dead ends: 843 [2018-07-23 15:20:43,202 INFO L573 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 [2018-07-23 15:20:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-07-23 15:20:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-07-23 15:20:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-07-23 15:20:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-07-23 15:20:43,822 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-07-23 15:20:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:43,823 INFO L471 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-07-23 15:20:43,823 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:20:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-07-23 15:20:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-07-23 15:20:43,827 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:43,827 INFO L353 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-07-23 15:20:43,827 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 78 times [2018-07-23 15:20:43,828 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-07-23 15:20:44,473 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:44,473 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:20:44,474 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:20:44,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:20:44,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:20:44,475 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-07-23 15:20:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:45,229 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-07-23 15:20:45,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:20:45,229 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-07-23 15:20:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:45,232 INFO L225 Difference]: With dead ends: 857 [2018-07-23 15:20:45,233 INFO L226 Difference]: Without dead ends: 855 [2018-07-23 15:20:45,234 INFO L573 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 [2018-07-23 15:20:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-07-23 15:20:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-07-23 15:20:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-07-23 15:20:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-07-23 15:20:45,914 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-07-23 15:20:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:45,915 INFO L471 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-07-23 15:20:45,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:20:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-07-23 15:20:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-07-23 15:20:45,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:45,920 INFO L353 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-07-23 15:20:45,920 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 79 times [2018-07-23 15:20:45,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-07-23 15:20:46,560 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:46,560 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:20:46,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:20:46,561 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:20:46,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:20:46,561 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-07-23 15:20:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:47,311 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-07-23 15:20:47,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:20:47,311 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-07-23 15:20:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:47,313 INFO L225 Difference]: With dead ends: 869 [2018-07-23 15:20:47,313 INFO L226 Difference]: Without dead ends: 867 [2018-07-23 15:20:47,314 INFO L573 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 [2018-07-23 15:20:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-07-23 15:20:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-07-23 15:20:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-07-23 15:20:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-07-23 15:20:48,004 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-07-23 15:20:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:48,004 INFO L471 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-07-23 15:20:48,004 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:20:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-07-23 15:20:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-07-23 15:20:48,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:48,010 INFO L353 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-07-23 15:20:48,010 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 80 times [2018-07-23 15:20:48,010 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-07-23 15:20:48,721 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:48,721 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:20:48,722 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:20:48,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:20:48,722 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:20:48,723 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-07-23 15:20:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:49,466 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-07-23 15:20:49,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:20:49,466 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-07-23 15:20:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:49,468 INFO L225 Difference]: With dead ends: 881 [2018-07-23 15:20:49,468 INFO L226 Difference]: Without dead ends: 879 [2018-07-23 15:20:49,469 INFO L573 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 [2018-07-23 15:20:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-07-23 15:20:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-07-23 15:20:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-07-23 15:20:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-07-23 15:20:50,160 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-07-23 15:20:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:50,160 INFO L471 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-07-23 15:20:50,160 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:20:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-07-23 15:20:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-07-23 15:20:50,165 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:50,165 INFO L353 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-07-23 15:20:50,165 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 81 times [2018-07-23 15:20:50,165 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-07-23 15:20:50,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:50,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:20:50,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:20:50,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:20:50,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:20:50,852 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-07-23 15:20:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:51,656 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-07-23 15:20:51,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:20:51,656 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-07-23 15:20:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:51,658 INFO L225 Difference]: With dead ends: 893 [2018-07-23 15:20:51,658 INFO L226 Difference]: Without dead ends: 891 [2018-07-23 15:20:51,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:20:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-07-23 15:20:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-07-23 15:20:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-07-23 15:20:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-07-23 15:20:52,355 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-07-23 15:20:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:52,355 INFO L471 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-07-23 15:20:52,355 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:20:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-07-23 15:20:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-07-23 15:20:52,361 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:52,361 INFO L353 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-07-23 15:20:52,361 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 82 times [2018-07-23 15:20:52,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-07-23 15:20:53,110 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:53,110 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:20:53,111 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:20:53,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:20:53,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:20:53,112 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-07-23 15:20:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:53,888 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-07-23 15:20:53,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:20:53,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-07-23 15:20:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:53,889 INFO L225 Difference]: With dead ends: 905 [2018-07-23 15:20:53,889 INFO L226 Difference]: Without dead ends: 903 [2018-07-23 15:20:53,890 INFO L573 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 [2018-07-23 15:20:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-07-23 15:20:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-07-23 15:20:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-07-23 15:20:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-07-23 15:20:54,624 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-07-23 15:20:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:54,625 INFO L471 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-07-23 15:20:54,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:20:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-07-23 15:20:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-07-23 15:20:54,629 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:54,630 INFO L353 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-07-23 15:20:54,630 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 83 times [2018-07-23 15:20:54,630 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-07-23 15:20:55,387 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:55,388 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:20:55,388 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:20:55,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:20:55,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:20:55,389 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-07-23 15:20:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:56,210 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-07-23 15:20:56,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:20:56,210 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-07-23 15:20:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:56,212 INFO L225 Difference]: With dead ends: 917 [2018-07-23 15:20:56,212 INFO L226 Difference]: Without dead ends: 915 [2018-07-23 15:20:56,212 INFO L573 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 [2018-07-23 15:20:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-07-23 15:20:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-07-23 15:20:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-07-23 15:20:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-07-23 15:20:56,959 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-07-23 15:20:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:56,960 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-07-23 15:20:56,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:20:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-07-23 15:20:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-07-23 15:20:56,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:56,968 INFO L353 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-07-23 15:20:56,968 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 84 times [2018-07-23 15:20:56,969 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:20:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-07-23 15:20:57,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:20:57,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:20:57,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:20:57,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:20:57,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:20:57,741 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-07-23 15:20:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:20:58,596 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-07-23 15:20:58,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:20:58,596 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-07-23 15:20:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:20:58,597 INFO L225 Difference]: With dead ends: 929 [2018-07-23 15:20:58,598 INFO L226 Difference]: Without dead ends: 927 [2018-07-23 15:20:58,598 INFO L573 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 [2018-07-23 15:20:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-07-23 15:20:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-07-23 15:20:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-07-23 15:20:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-07-23 15:20:59,373 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-07-23 15:20:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:20:59,374 INFO L471 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-07-23 15:20:59,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:20:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-07-23 15:20:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-07-23 15:20:59,382 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:20:59,382 INFO L353 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-07-23 15:20:59,382 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:20:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 85 times [2018-07-23 15:20:59,383 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:20:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-07-23 15:21:00,168 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:00,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:21:00,168 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:21:00,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:21:00,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:21:00,170 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. [2018-07-23 15:21:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:01,041 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2018-07-23 15:21:01,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:21:01,041 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 915 [2018-07-23 15:21:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:01,042 INFO L225 Difference]: With dead ends: 941 [2018-07-23 15:21:01,043 INFO L226 Difference]: Without dead ends: 939 [2018-07-23 15:21:01,043 INFO L573 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 [2018-07-23 15:21:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-07-23 15:21:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2018-07-23 15:21:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2018-07-23 15:21:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1005 transitions. [2018-07-23 15:21:01,847 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1005 transitions. Word has length 915 [2018-07-23 15:21:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:01,848 INFO L471 AbstractCegarLoop]: Abstraction has 928 states and 1005 transitions. [2018-07-23 15:21:01,848 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:21:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1005 transitions. [2018-07-23 15:21:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-07-23 15:21:01,853 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:01,854 INFO L353 BasicCegarLoop]: trace histogram [770, 77, 77, 1, 1, 1] [2018-07-23 15:21:01,854 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:01,854 INFO L82 PathProgramCache]: Analyzing trace with hash 345957445, now seen corresponding path program 86 times [2018-07-23 15:21:01,854 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 361284 backedges. 0 proven. 357049 refuted. 0 times theorem prover too weak. 4235 trivial. 0 not checked. [2018-07-23 15:21:02,620 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:02,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:21:02,621 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:21:02,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:21:02,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:21:02,622 INFO L87 Difference]: Start difference. First operand 928 states and 1005 transitions. Second operand 80 states. [2018-07-23 15:21:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:03,537 INFO L93 Difference]: Finished difference Result 953 states and 1032 transitions. [2018-07-23 15:21:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:21:03,537 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 927 [2018-07-23 15:21:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:03,539 INFO L225 Difference]: With dead ends: 953 [2018-07-23 15:21:03,539 INFO L226 Difference]: Without dead ends: 951 [2018-07-23 15:21:03,540 INFO L573 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 [2018-07-23 15:21:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2018-07-23 15:21:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 940. [2018-07-23 15:21:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2018-07-23 15:21:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1018 transitions. [2018-07-23 15:21:04,433 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1018 transitions. Word has length 927 [2018-07-23 15:21:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:04,434 INFO L471 AbstractCegarLoop]: Abstraction has 940 states and 1018 transitions. [2018-07-23 15:21:04,434 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:21:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1018 transitions. [2018-07-23 15:21:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2018-07-23 15:21:04,440 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:04,440 INFO L353 BasicCegarLoop]: trace histogram [780, 78, 78, 1, 1, 1] [2018-07-23 15:21:04,441 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash -456595313, now seen corresponding path program 87 times [2018-07-23 15:21:04,441 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 370734 backedges. 0 proven. 366444 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-07-23 15:21:05,263 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:05,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:21:05,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:21:05,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:21:05,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:21:05,265 INFO L87 Difference]: Start difference. First operand 940 states and 1018 transitions. Second operand 81 states. [2018-07-23 15:21:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:06,226 INFO L93 Difference]: Finished difference Result 965 states and 1045 transitions. [2018-07-23 15:21:06,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:21:06,227 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 939 [2018-07-23 15:21:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:06,228 INFO L225 Difference]: With dead ends: 965 [2018-07-23 15:21:06,228 INFO L226 Difference]: Without dead ends: 963 [2018-07-23 15:21:06,229 INFO L573 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 [2018-07-23 15:21:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-07-23 15:21:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 952. [2018-07-23 15:21:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-07-23 15:21:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1031 transitions. [2018-07-23 15:21:07,155 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1031 transitions. Word has length 939 [2018-07-23 15:21:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:07,155 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1031 transitions. [2018-07-23 15:21:07,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:21:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1031 transitions. [2018-07-23 15:21:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2018-07-23 15:21:07,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:07,160 INFO L353 BasicCegarLoop]: trace histogram [790, 79, 79, 1, 1, 1] [2018-07-23 15:21:07,161 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1007890983, now seen corresponding path program 88 times [2018-07-23 15:21:07,161 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 380306 backedges. 0 proven. 375961 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2018-07-23 15:21:07,983 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:07,983 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:21:07,983 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:21:07,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:21:07,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:21:07,984 INFO L87 Difference]: Start difference. First operand 952 states and 1031 transitions. Second operand 82 states. [2018-07-23 15:21:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:08,969 INFO L93 Difference]: Finished difference Result 977 states and 1058 transitions. [2018-07-23 15:21:08,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:21:08,969 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 951 [2018-07-23 15:21:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:08,971 INFO L225 Difference]: With dead ends: 977 [2018-07-23 15:21:08,971 INFO L226 Difference]: Without dead ends: 975 [2018-07-23 15:21:08,973 INFO L573 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 [2018-07-23 15:21:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-07-23 15:21:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 964. [2018-07-23 15:21:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-07-23 15:21:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1044 transitions. [2018-07-23 15:21:09,999 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1044 transitions. Word has length 951 [2018-07-23 15:21:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:10,000 INFO L471 AbstractCegarLoop]: Abstraction has 964 states and 1044 transitions. [2018-07-23 15:21:10,000 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:21:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1044 transitions. [2018-07-23 15:21:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-07-23 15:21:10,040 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:10,041 INFO L353 BasicCegarLoop]: trace histogram [800, 80, 80, 1, 1, 1] [2018-07-23 15:21:10,041 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash 759239715, now seen corresponding path program 89 times [2018-07-23 15:21:10,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 390000 backedges. 0 proven. 385600 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2018-07-23 15:21:10,868 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:10,868 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:21:10,869 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:21:10,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:21:10,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:21:10,870 INFO L87 Difference]: Start difference. First operand 964 states and 1044 transitions. Second operand 83 states. [2018-07-23 15:21:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:11,865 INFO L93 Difference]: Finished difference Result 989 states and 1071 transitions. [2018-07-23 15:21:11,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:21:11,865 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 963 [2018-07-23 15:21:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:11,867 INFO L225 Difference]: With dead ends: 989 [2018-07-23 15:21:11,867 INFO L226 Difference]: Without dead ends: 987 [2018-07-23 15:21:11,868 INFO L573 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 [2018-07-23 15:21:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2018-07-23 15:21:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 976. [2018-07-23 15:21:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2018-07-23 15:21:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1057 transitions. [2018-07-23 15:21:12,768 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1057 transitions. Word has length 963 [2018-07-23 15:21:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:12,768 INFO L471 AbstractCegarLoop]: Abstraction has 976 states and 1057 transitions. [2018-07-23 15:21:12,768 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:21:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1057 transitions. [2018-07-23 15:21:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2018-07-23 15:21:12,774 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:12,774 INFO L353 BasicCegarLoop]: trace histogram [810, 81, 81, 1, 1, 1] [2018-07-23 15:21:12,774 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -29607059, now seen corresponding path program 90 times [2018-07-23 15:21:12,775 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 399816 backedges. 0 proven. 395361 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2018-07-23 15:21:13,684 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:13,684 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:21:13,685 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:21:13,685 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:21:13,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:21:13,686 INFO L87 Difference]: Start difference. First operand 976 states and 1057 transitions. Second operand 84 states. [2018-07-23 15:21:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:14,686 INFO L93 Difference]: Finished difference Result 1001 states and 1084 transitions. [2018-07-23 15:21:14,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:21:14,687 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 975 [2018-07-23 15:21:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:14,689 INFO L225 Difference]: With dead ends: 1001 [2018-07-23 15:21:14,689 INFO L226 Difference]: Without dead ends: 999 [2018-07-23 15:21:14,690 INFO L573 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 [2018-07-23 15:21:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2018-07-23 15:21:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 988. [2018-07-23 15:21:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2018-07-23 15:21:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1070 transitions. [2018-07-23 15:21:15,686 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1070 transitions. Word has length 975 [2018-07-23 15:21:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:15,687 INFO L471 AbstractCegarLoop]: Abstraction has 988 states and 1070 transitions. [2018-07-23 15:21:15,687 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:21:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1070 transitions. [2018-07-23 15:21:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2018-07-23 15:21:15,693 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:15,693 INFO L353 BasicCegarLoop]: trace histogram [820, 82, 82, 1, 1, 1] [2018-07-23 15:21:15,693 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 378848183, now seen corresponding path program 91 times [2018-07-23 15:21:15,694 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 409754 backedges. 0 proven. 405244 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2018-07-23 15:21:16,583 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:16,583 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:21:16,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:21:16,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:21:16,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:21:16,584 INFO L87 Difference]: Start difference. First operand 988 states and 1070 transitions. Second operand 85 states. [2018-07-23 15:21:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:17,591 INFO L93 Difference]: Finished difference Result 1013 states and 1097 transitions. [2018-07-23 15:21:17,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:21:17,591 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 987 [2018-07-23 15:21:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:17,593 INFO L225 Difference]: With dead ends: 1013 [2018-07-23 15:21:17,594 INFO L226 Difference]: Without dead ends: 1011 [2018-07-23 15:21:17,594 INFO L573 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 [2018-07-23 15:21:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2018-07-23 15:21:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1000. [2018-07-23 15:21:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2018-07-23 15:21:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1083 transitions. [2018-07-23 15:21:18,633 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1083 transitions. Word has length 987 [2018-07-23 15:21:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:18,633 INFO L471 AbstractCegarLoop]: Abstraction has 1000 states and 1083 transitions. [2018-07-23 15:21:18,633 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:21:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1083 transitions. [2018-07-23 15:21:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2018-07-23 15:21:18,639 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:18,639 INFO L353 BasicCegarLoop]: trace histogram [830, 83, 83, 1, 1, 1] [2018-07-23 15:21:18,639 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash -129946367, now seen corresponding path program 92 times [2018-07-23 15:21:18,640 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 419814 backedges. 0 proven. 415249 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2018-07-23 15:21:19,560 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:19,560 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:21:19,561 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:21:19,561 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:21:19,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:21:19,562 INFO L87 Difference]: Start difference. First operand 1000 states and 1083 transitions. Second operand 86 states. [2018-07-23 15:21:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:20,599 INFO L93 Difference]: Finished difference Result 1025 states and 1110 transitions. [2018-07-23 15:21:20,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:21:20,599 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 999 [2018-07-23 15:21:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:20,601 INFO L225 Difference]: With dead ends: 1025 [2018-07-23 15:21:20,601 INFO L226 Difference]: Without dead ends: 1023 [2018-07-23 15:21:20,602 INFO L573 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 [2018-07-23 15:21:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-07-23 15:21:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1012. [2018-07-23 15:21:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2018-07-23 15:21:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1096 transitions. [2018-07-23 15:21:21,890 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1096 transitions. Word has length 999 [2018-07-23 15:21:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:21,890 INFO L471 AbstractCegarLoop]: Abstraction has 1012 states and 1096 transitions. [2018-07-23 15:21:21,890 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:21:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1096 transitions. [2018-07-23 15:21:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2018-07-23 15:21:21,896 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:21,896 INFO L353 BasicCegarLoop]: trace histogram [840, 84, 84, 1, 1, 1] [2018-07-23 15:21:21,896 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1735915339, now seen corresponding path program 93 times [2018-07-23 15:21:21,897 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 429996 backedges. 0 proven. 425376 refuted. 0 times theorem prover too weak. 4620 trivial. 0 not checked. [2018-07-23 15:21:22,842 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:22,842 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:21:22,843 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:21:22,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:21:22,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:21:22,844 INFO L87 Difference]: Start difference. First operand 1012 states and 1096 transitions. Second operand 87 states. [2018-07-23 15:21:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:23,984 INFO L93 Difference]: Finished difference Result 1037 states and 1123 transitions. [2018-07-23 15:21:23,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:21:23,985 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 1011 [2018-07-23 15:21:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:23,986 INFO L225 Difference]: With dead ends: 1037 [2018-07-23 15:21:23,986 INFO L226 Difference]: Without dead ends: 1035 [2018-07-23 15:21:23,987 INFO L573 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 [2018-07-23 15:21:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2018-07-23 15:21:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1024. [2018-07-23 15:21:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-07-23 15:21:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1109 transitions. [2018-07-23 15:21:25,087 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1109 transitions. Word has length 1011 [2018-07-23 15:21:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:25,087 INFO L471 AbstractCegarLoop]: Abstraction has 1024 states and 1109 transitions. [2018-07-23 15:21:25,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:21:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1109 transitions. [2018-07-23 15:21:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2018-07-23 15:21:25,093 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:25,094 INFO L353 BasicCegarLoop]: trace histogram [850, 85, 85, 1, 1, 1] [2018-07-23 15:21:25,094 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 179282581, now seen corresponding path program 94 times [2018-07-23 15:21:25,094 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 440300 backedges. 0 proven. 435625 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2018-07-23 15:21:26,058 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:26,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:21:26,059 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:21:26,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:21:26,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:21:26,060 INFO L87 Difference]: Start difference. First operand 1024 states and 1109 transitions. Second operand 88 states. [2018-07-23 15:21:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:27,226 INFO L93 Difference]: Finished difference Result 1049 states and 1136 transitions. [2018-07-23 15:21:27,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:21:27,226 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1023 [2018-07-23 15:21:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:27,227 INFO L225 Difference]: With dead ends: 1049 [2018-07-23 15:21:27,227 INFO L226 Difference]: Without dead ends: 1047 [2018-07-23 15:21:27,228 INFO L573 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 [2018-07-23 15:21:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2018-07-23 15:21:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1036. [2018-07-23 15:21:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2018-07-23 15:21:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1122 transitions. [2018-07-23 15:21:28,253 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1122 transitions. Word has length 1023 [2018-07-23 15:21:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:28,254 INFO L471 AbstractCegarLoop]: Abstraction has 1036 states and 1122 transitions. [2018-07-23 15:21:28,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:21:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1122 transitions. [2018-07-23 15:21:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2018-07-23 15:21:28,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:28,260 INFO L353 BasicCegarLoop]: trace histogram [860, 86, 86, 1, 1, 1] [2018-07-23 15:21:28,260 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:28,260 INFO L82 PathProgramCache]: Analyzing trace with hash 178171615, now seen corresponding path program 95 times [2018-07-23 15:21:28,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 450726 backedges. 0 proven. 445996 refuted. 0 times theorem prover too weak. 4730 trivial. 0 not checked. [2018-07-23 15:21:29,308 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:29,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:21:29,309 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:21:29,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:21:29,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:21:29,310 INFO L87 Difference]: Start difference. First operand 1036 states and 1122 transitions. Second operand 89 states. [2018-07-23 15:21:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:30,520 INFO L93 Difference]: Finished difference Result 1061 states and 1149 transitions. [2018-07-23 15:21:30,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:21:30,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 1035 [2018-07-23 15:21:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:30,522 INFO L225 Difference]: With dead ends: 1061 [2018-07-23 15:21:30,522 INFO L226 Difference]: Without dead ends: 1059 [2018-07-23 15:21:30,522 INFO L573 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 [2018-07-23 15:21:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2018-07-23 15:21:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1048. [2018-07-23 15:21:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-07-23 15:21:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1135 transitions. [2018-07-23 15:21:31,620 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1135 transitions. Word has length 1035 [2018-07-23 15:21:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:31,621 INFO L471 AbstractCegarLoop]: Abstraction has 1048 states and 1135 transitions. [2018-07-23 15:21:31,621 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:21:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1135 transitions. [2018-07-23 15:21:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2018-07-23 15:21:31,627 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:31,627 INFO L353 BasicCegarLoop]: trace histogram [870, 87, 87, 1, 1, 1] [2018-07-23 15:21:31,627 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:31,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1304716247, now seen corresponding path program 96 times [2018-07-23 15:21:31,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 461274 backedges. 0 proven. 456489 refuted. 0 times theorem prover too weak. 4785 trivial. 0 not checked. [2018-07-23 15:21:32,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:32,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:21:32,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:21:32,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:21:32,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:21:32,659 INFO L87 Difference]: Start difference. First operand 1048 states and 1135 transitions. Second operand 90 states. [2018-07-23 15:21:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:33,920 INFO L93 Difference]: Finished difference Result 1073 states and 1162 transitions. [2018-07-23 15:21:33,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:21:33,920 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 1047 [2018-07-23 15:21:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:33,922 INFO L225 Difference]: With dead ends: 1073 [2018-07-23 15:21:33,922 INFO L226 Difference]: Without dead ends: 1071 [2018-07-23 15:21:33,922 INFO L573 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 [2018-07-23 15:21:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-07-23 15:21:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1060. [2018-07-23 15:21:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1060 states. [2018-07-23 15:21:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1148 transitions. [2018-07-23 15:21:35,122 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1148 transitions. Word has length 1047 [2018-07-23 15:21:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:35,123 INFO L471 AbstractCegarLoop]: Abstraction has 1060 states and 1148 transitions. [2018-07-23 15:21:35,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:21:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1148 transitions. [2018-07-23 15:21:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2018-07-23 15:21:35,129 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:35,129 INFO L353 BasicCegarLoop]: trace histogram [880, 88, 88, 1, 1, 1] [2018-07-23 15:21:35,129 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash 247261811, now seen corresponding path program 97 times [2018-07-23 15:21:35,130 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 471944 backedges. 0 proven. 467104 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-07-23 15:21:36,119 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:36,119 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:21:36,120 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:21:36,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:21:36,121 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:21:36,121 INFO L87 Difference]: Start difference. First operand 1060 states and 1148 transitions. Second operand 91 states. [2018-07-23 15:21:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:37,425 INFO L93 Difference]: Finished difference Result 1085 states and 1175 transitions. [2018-07-23 15:21:37,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:21:37,425 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1059 [2018-07-23 15:21:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:37,427 INFO L225 Difference]: With dead ends: 1085 [2018-07-23 15:21:37,427 INFO L226 Difference]: Without dead ends: 1083 [2018-07-23 15:21:37,428 INFO L573 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 [2018-07-23 15:21:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2018-07-23 15:21:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1072. [2018-07-23 15:21:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2018-07-23 15:21:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1161 transitions. [2018-07-23 15:21:38,589 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1161 transitions. Word has length 1059 [2018-07-23 15:21:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:38,589 INFO L471 AbstractCegarLoop]: Abstraction has 1072 states and 1161 transitions. [2018-07-23 15:21:38,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:21:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1161 transitions. [2018-07-23 15:21:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2018-07-23 15:21:38,596 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:38,597 INFO L353 BasicCegarLoop]: trace histogram [890, 89, 89, 1, 1, 1] [2018-07-23 15:21:38,597 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1885791811, now seen corresponding path program 98 times [2018-07-23 15:21:38,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 482736 backedges. 0 proven. 477841 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2018-07-23 15:21:39,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:39,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:21:39,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:21:39,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:21:39,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:21:39,620 INFO L87 Difference]: Start difference. First operand 1072 states and 1161 transitions. Second operand 92 states. [2018-07-23 15:21:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:40,935 INFO L93 Difference]: Finished difference Result 1097 states and 1188 transitions. [2018-07-23 15:21:40,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:21:40,935 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 1071 [2018-07-23 15:21:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:40,936 INFO L225 Difference]: With dead ends: 1097 [2018-07-23 15:21:40,936 INFO L226 Difference]: Without dead ends: 1095 [2018-07-23 15:21:40,937 INFO L573 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 [2018-07-23 15:21:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2018-07-23 15:21:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1084. [2018-07-23 15:21:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2018-07-23 15:21:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1174 transitions. [2018-07-23 15:21:42,080 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1174 transitions. Word has length 1071 [2018-07-23 15:21:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:42,081 INFO L471 AbstractCegarLoop]: Abstraction has 1084 states and 1174 transitions. [2018-07-23 15:21:42,081 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:21:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1174 transitions. [2018-07-23 15:21:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2018-07-23 15:21:42,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:42,089 INFO L353 BasicCegarLoop]: trace histogram [900, 90, 90, 1, 1, 1] [2018-07-23 15:21:42,089 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1501124089, now seen corresponding path program 99 times [2018-07-23 15:21:42,090 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 493650 backedges. 0 proven. 488700 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2018-07-23 15:21:43,180 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:43,180 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:21:43,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:21:43,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:21:43,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:21:43,182 INFO L87 Difference]: Start difference. First operand 1084 states and 1174 transitions. Second operand 93 states. [2018-07-23 15:21:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:44,525 INFO L93 Difference]: Finished difference Result 1109 states and 1201 transitions. [2018-07-23 15:21:44,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:21:44,525 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1083 [2018-07-23 15:21:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:44,526 INFO L225 Difference]: With dead ends: 1109 [2018-07-23 15:21:44,526 INFO L226 Difference]: Without dead ends: 1107 [2018-07-23 15:21:44,527 INFO L573 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 [2018-07-23 15:21:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2018-07-23 15:21:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1096. [2018-07-23 15:21:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1096 states. [2018-07-23 15:21:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1187 transitions. [2018-07-23 15:21:45,704 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1187 transitions. Word has length 1083 [2018-07-23 15:21:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:45,705 INFO L471 AbstractCegarLoop]: Abstraction has 1096 states and 1187 transitions. [2018-07-23 15:21:45,705 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:21:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1187 transitions. [2018-07-23 15:21:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2018-07-23 15:21:45,711 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:45,711 INFO L353 BasicCegarLoop]: trace histogram [910, 91, 91, 1, 1, 1] [2018-07-23 15:21:45,711 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1736186705, now seen corresponding path program 100 times [2018-07-23 15:21:45,712 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 504686 backedges. 0 proven. 499681 refuted. 0 times theorem prover too weak. 5005 trivial. 0 not checked. [2018-07-23 15:21:46,793 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:46,793 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:21:46,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:21:46,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:21:46,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:21:46,795 INFO L87 Difference]: Start difference. First operand 1096 states and 1187 transitions. Second operand 94 states. [2018-07-23 15:21:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:48,115 INFO L93 Difference]: Finished difference Result 1121 states and 1214 transitions. [2018-07-23 15:21:48,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:21:48,115 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1095 [2018-07-23 15:21:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:48,116 INFO L225 Difference]: With dead ends: 1121 [2018-07-23 15:21:48,116 INFO L226 Difference]: Without dead ends: 1119 [2018-07-23 15:21:48,117 INFO L573 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 [2018-07-23 15:21:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-07-23 15:21:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1108. [2018-07-23 15:21:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2018-07-23 15:21:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1200 transitions. [2018-07-23 15:21:49,336 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1200 transitions. Word has length 1095 [2018-07-23 15:21:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:49,337 INFO L471 AbstractCegarLoop]: Abstraction has 1108 states and 1200 transitions. [2018-07-23 15:21:49,337 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:21:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1200 transitions. [2018-07-23 15:21:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2018-07-23 15:21:49,343 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:49,343 INFO L353 BasicCegarLoop]: trace histogram [920, 92, 92, 1, 1, 1] [2018-07-23 15:21:49,343 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 682618267, now seen corresponding path program 101 times [2018-07-23 15:21:49,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 515844 backedges. 0 proven. 510784 refuted. 0 times theorem prover too weak. 5060 trivial. 0 not checked. [2018-07-23 15:21:50,459 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:50,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:21:50,460 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:21:50,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:21:50,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:21:50,461 INFO L87 Difference]: Start difference. First operand 1108 states and 1200 transitions. Second operand 95 states. [2018-07-23 15:21:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:51,871 INFO L93 Difference]: Finished difference Result 1133 states and 1227 transitions. [2018-07-23 15:21:51,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:21:51,871 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 1107 [2018-07-23 15:21:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:51,873 INFO L225 Difference]: With dead ends: 1133 [2018-07-23 15:21:51,873 INFO L226 Difference]: Without dead ends: 1131 [2018-07-23 15:21:51,873 INFO L573 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 [2018-07-23 15:21:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2018-07-23 15:21:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1120. [2018-07-23 15:21:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2018-07-23 15:21:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1213 transitions. [2018-07-23 15:21:53,134 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1213 transitions. Word has length 1107 [2018-07-23 15:21:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:53,135 INFO L471 AbstractCegarLoop]: Abstraction has 1120 states and 1213 transitions. [2018-07-23 15:21:53,135 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:21:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1213 transitions. [2018-07-23 15:21:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2018-07-23 15:21:53,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:53,141 INFO L353 BasicCegarLoop]: trace histogram [930, 93, 93, 1, 1, 1] [2018-07-23 15:21:53,141 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash 580428005, now seen corresponding path program 102 times [2018-07-23 15:21:53,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 527124 backedges. 0 proven. 522009 refuted. 0 times theorem prover too weak. 5115 trivial. 0 not checked. [2018-07-23 15:21:54,312 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:54,312 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:21:54,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:21:54,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:21:54,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:21:54,314 INFO L87 Difference]: Start difference. First operand 1120 states and 1213 transitions. Second operand 96 states. [2018-07-23 15:21:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:55,829 INFO L93 Difference]: Finished difference Result 1145 states and 1240 transitions. [2018-07-23 15:21:55,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:21:55,830 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 1119 [2018-07-23 15:21:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:55,831 INFO L225 Difference]: With dead ends: 1145 [2018-07-23 15:21:55,831 INFO L226 Difference]: Without dead ends: 1143 [2018-07-23 15:21:55,831 INFO L573 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 [2018-07-23 15:21:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-07-23 15:21:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1132. [2018-07-23 15:21:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2018-07-23 15:21:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1226 transitions. [2018-07-23 15:21:57,097 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1226 transitions. Word has length 1119 [2018-07-23 15:21:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:21:57,098 INFO L471 AbstractCegarLoop]: Abstraction has 1132 states and 1226 transitions. [2018-07-23 15:21:57,098 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:21:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1226 transitions. [2018-07-23 15:21:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2018-07-23 15:21:57,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:21:57,105 INFO L353 BasicCegarLoop]: trace histogram [940, 94, 94, 1, 1, 1] [2018-07-23 15:21:57,105 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:21:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash 267171119, now seen corresponding path program 103 times [2018-07-23 15:21:57,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:21:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:21:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 538526 backedges. 0 proven. 533356 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2018-07-23 15:21:58,260 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:21:58,260 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:21:58,261 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:21:58,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:21:58,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:21:58,262 INFO L87 Difference]: Start difference. First operand 1132 states and 1226 transitions. Second operand 97 states. [2018-07-23 15:21:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:21:59,769 INFO L93 Difference]: Finished difference Result 1157 states and 1253 transitions. [2018-07-23 15:21:59,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:21:59,769 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1131 [2018-07-23 15:21:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:21:59,771 INFO L225 Difference]: With dead ends: 1157 [2018-07-23 15:21:59,771 INFO L226 Difference]: Without dead ends: 1155 [2018-07-23 15:21:59,772 INFO L573 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 [2018-07-23 15:21:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2018-07-23 15:22:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1144. [2018-07-23 15:22:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1144 states. [2018-07-23 15:22:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1239 transitions. [2018-07-23 15:22:01,091 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1239 transitions. Word has length 1131 [2018-07-23 15:22:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:01,091 INFO L471 AbstractCegarLoop]: Abstraction has 1144 states and 1239 transitions. [2018-07-23 15:22:01,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:22:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1239 transitions. [2018-07-23 15:22:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2018-07-23 15:22:01,098 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:01,098 INFO L353 BasicCegarLoop]: trace histogram [950, 95, 95, 1, 1, 1] [2018-07-23 15:22:01,098 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -844977543, now seen corresponding path program 104 times [2018-07-23 15:22:01,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 550050 backedges. 0 proven. 544825 refuted. 0 times theorem prover too weak. 5225 trivial. 0 not checked. [2018-07-23 15:22:02,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:02,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:22:02,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:22:02,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:22:02,282 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:22:02,283 INFO L87 Difference]: Start difference. First operand 1144 states and 1239 transitions. Second operand 98 states. [2018-07-23 15:22:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:03,802 INFO L93 Difference]: Finished difference Result 1169 states and 1266 transitions. [2018-07-23 15:22:03,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:22:03,803 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 1143 [2018-07-23 15:22:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:03,804 INFO L225 Difference]: With dead ends: 1169 [2018-07-23 15:22:03,804 INFO L226 Difference]: Without dead ends: 1167 [2018-07-23 15:22:03,805 INFO L573 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 [2018-07-23 15:22:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-07-23 15:22:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1156. [2018-07-23 15:22:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2018-07-23 15:22:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1252 transitions. [2018-07-23 15:22:05,147 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1252 transitions. Word has length 1143 [2018-07-23 15:22:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:05,148 INFO L471 AbstractCegarLoop]: Abstraction has 1156 states and 1252 transitions. [2018-07-23 15:22:05,148 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:22:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1252 transitions. [2018-07-23 15:22:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-07-23 15:22:05,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:05,155 INFO L353 BasicCegarLoop]: trace histogram [960, 96, 96, 1, 1, 1] [2018-07-23 15:22:05,155 INFO L414 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:05,155 INFO L82 PathProgramCache]: Analyzing trace with hash -84868925, now seen corresponding path program 105 times [2018-07-23 15:22:05,155 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 561696 backedges. 0 proven. 556416 refuted. 0 times theorem prover too weak. 5280 trivial. 0 not checked. [2018-07-23 15:22:06,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:06,354 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:22:06,354 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:22:06,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:22:06,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:22:06,355 INFO L87 Difference]: Start difference. First operand 1156 states and 1252 transitions. Second operand 99 states. [2018-07-23 15:22:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:07,944 INFO L93 Difference]: Finished difference Result 1181 states and 1279 transitions. [2018-07-23 15:22:07,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:22:07,944 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 1155 [2018-07-23 15:22:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:07,945 INFO L225 Difference]: With dead ends: 1181 [2018-07-23 15:22:07,946 INFO L226 Difference]: Without dead ends: 1179 [2018-07-23 15:22:07,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:22:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2018-07-23 15:22:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1168. [2018-07-23 15:22:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2018-07-23 15:22:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1265 transitions. [2018-07-23 15:22:09,358 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1265 transitions. Word has length 1155 [2018-07-23 15:22:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:09,359 INFO L471 AbstractCegarLoop]: Abstraction has 1168 states and 1265 transitions. [2018-07-23 15:22:09,359 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:22:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1265 transitions. [2018-07-23 15:22:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2018-07-23 15:22:09,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:09,366 INFO L353 BasicCegarLoop]: trace histogram [970, 97, 97, 1, 1, 1] [2018-07-23 15:22:09,366 INFO L414 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1722927091, now seen corresponding path program 106 times [2018-07-23 15:22:09,366 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 573464 backedges. 0 proven. 568129 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2018-07-23 15:22:10,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:10,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:22:10,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:22:10,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:22:10,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:22:10,601 INFO L87 Difference]: Start difference. First operand 1168 states and 1265 transitions. Second operand 100 states. [2018-07-23 15:22:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:12,127 INFO L93 Difference]: Finished difference Result 1193 states and 1292 transitions. [2018-07-23 15:22:12,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:22:12,127 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1167 [2018-07-23 15:22:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:12,129 INFO L225 Difference]: With dead ends: 1193 [2018-07-23 15:22:12,129 INFO L226 Difference]: Without dead ends: 1191 [2018-07-23 15:22:12,130 INFO L573 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 [2018-07-23 15:22:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-07-23 15:22:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-07-23 15:22:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-07-23 15:22:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1278 transitions. [2018-07-23 15:22:13,545 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1278 transitions. Word has length 1167 [2018-07-23 15:22:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:13,546 INFO L471 AbstractCegarLoop]: Abstraction has 1180 states and 1278 transitions. [2018-07-23 15:22:13,546 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:22:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1278 transitions. [2018-07-23 15:22:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2018-07-23 15:22:13,553 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:13,553 INFO L353 BasicCegarLoop]: trace histogram [980, 98, 98, 1, 1, 1] [2018-07-23 15:22:13,553 INFO L414 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1401892777, now seen corresponding path program 107 times [2018-07-23 15:22:13,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 585354 backedges. 0 proven. 579964 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2018-07-23 15:22:14,796 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:14,796 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:22:14,796 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:22:14,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:22:14,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:22:14,797 INFO L87 Difference]: Start difference. First operand 1180 states and 1278 transitions. Second operand 101 states. [2018-07-23 15:22:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:16,418 INFO L93 Difference]: Finished difference Result 1205 states and 1305 transitions. [2018-07-23 15:22:16,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:22:16,418 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 1179 [2018-07-23 15:22:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:16,419 INFO L225 Difference]: With dead ends: 1205 [2018-07-23 15:22:16,419 INFO L226 Difference]: Without dead ends: 1203 [2018-07-23 15:22:16,420 INFO L573 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 [2018-07-23 15:22:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2018-07-23 15:22:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1192. [2018-07-23 15:22:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2018-07-23 15:22:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1291 transitions. [2018-07-23 15:22:17,884 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1291 transitions. Word has length 1179 [2018-07-23 15:22:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:17,884 INFO L471 AbstractCegarLoop]: Abstraction has 1192 states and 1291 transitions. [2018-07-23 15:22:17,884 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:22:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1291 transitions. [2018-07-23 15:22:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2018-07-23 15:22:17,891 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:17,892 INFO L353 BasicCegarLoop]: trace histogram [990, 99, 99, 1, 1, 1] [2018-07-23 15:22:17,892 INFO L414 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:17,892 INFO L82 PathProgramCache]: Analyzing trace with hash -632338015, now seen corresponding path program 108 times [2018-07-23 15:22:17,892 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 597366 backedges. 0 proven. 591921 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2018-07-23 15:22:19,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:19,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:22:19,125 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:22:19,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:22:19,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:22:19,126 INFO L87 Difference]: Start difference. First operand 1192 states and 1291 transitions. Second operand 102 states. [2018-07-23 15:22:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:20,790 INFO L93 Difference]: Finished difference Result 1217 states and 1318 transitions. [2018-07-23 15:22:20,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:22:20,790 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 1191 [2018-07-23 15:22:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:20,791 INFO L225 Difference]: With dead ends: 1217 [2018-07-23 15:22:20,792 INFO L226 Difference]: Without dead ends: 1215 [2018-07-23 15:22:20,792 INFO L573 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 [2018-07-23 15:22:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-07-23 15:22:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1204. [2018-07-23 15:22:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2018-07-23 15:22:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1304 transitions. [2018-07-23 15:22:22,424 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1304 transitions. Word has length 1191 [2018-07-23 15:22:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:22,425 INFO L471 AbstractCegarLoop]: Abstraction has 1204 states and 1304 transitions. [2018-07-23 15:22:22,425 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:22:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1304 transitions. [2018-07-23 15:22:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2018-07-23 15:22:22,435 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:22,435 INFO L353 BasicCegarLoop]: trace histogram [1000, 100, 100, 1, 1, 1] [2018-07-23 15:22:22,435 INFO L414 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 186655723, now seen corresponding path program 109 times [2018-07-23 15:22:22,435 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 609500 backedges. 0 proven. 604000 refuted. 0 times theorem prover too weak. 5500 trivial. 0 not checked. [2018-07-23 15:22:23,752 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:23,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:22:23,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:22:23,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:22:23,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:22:23,753 INFO L87 Difference]: Start difference. First operand 1204 states and 1304 transitions. Second operand 103 states. [2018-07-23 15:22:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:25,494 INFO L93 Difference]: Finished difference Result 1229 states and 1331 transitions. [2018-07-23 15:22:25,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:22:25,494 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1203 [2018-07-23 15:22:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:25,495 INFO L225 Difference]: With dead ends: 1229 [2018-07-23 15:22:25,495 INFO L226 Difference]: Without dead ends: 1227 [2018-07-23 15:22:25,496 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:22:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2018-07-23 15:22:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2018-07-23 15:22:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2018-07-23 15:22:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1317 transitions. [2018-07-23 15:22:27,037 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1317 transitions. Word has length 1203 [2018-07-23 15:22:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:27,038 INFO L471 AbstractCegarLoop]: Abstraction has 1216 states and 1317 transitions. [2018-07-23 15:22:27,038 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:22:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1317 transitions. [2018-07-23 15:22:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2018-07-23 15:22:27,045 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:27,045 INFO L353 BasicCegarLoop]: trace histogram [1010, 101, 101, 1, 1, 1] [2018-07-23 15:22:27,046 INFO L414 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash 156884789, now seen corresponding path program 110 times [2018-07-23 15:22:27,046 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 621756 backedges. 0 proven. 616201 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2018-07-23 15:22:29,039 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:29,039 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:22:29,039 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:22:29,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:22:29,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:22:29,041 INFO L87 Difference]: Start difference. First operand 1216 states and 1317 transitions. Second operand 104 states. [2018-07-23 15:22:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:30,872 INFO L93 Difference]: Finished difference Result 1241 states and 1344 transitions. [2018-07-23 15:22:30,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:22:30,872 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 1215 [2018-07-23 15:22:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:30,873 INFO L225 Difference]: With dead ends: 1241 [2018-07-23 15:22:30,873 INFO L226 Difference]: Without dead ends: 1239 [2018-07-23 15:22:30,874 INFO L573 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 [2018-07-23 15:22:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-07-23 15:22:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1228. [2018-07-23 15:22:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2018-07-23 15:22:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1330 transitions. [2018-07-23 15:22:32,542 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1330 transitions. Word has length 1215 [2018-07-23 15:22:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:32,542 INFO L471 AbstractCegarLoop]: Abstraction has 1228 states and 1330 transitions. [2018-07-23 15:22:32,542 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:22:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1330 transitions. [2018-07-23 15:22:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2018-07-23 15:22:32,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:32,551 INFO L353 BasicCegarLoop]: trace histogram [1020, 102, 102, 1, 1, 1] [2018-07-23 15:22:32,551 INFO L414 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash 565377919, now seen corresponding path program 111 times [2018-07-23 15:22:32,551 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 634134 backedges. 0 proven. 628524 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2018-07-23 15:22:33,900 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:33,900 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:22:33,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:22:33,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:22:33,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:22:33,902 INFO L87 Difference]: Start difference. First operand 1228 states and 1330 transitions. Second operand 105 states. [2018-07-23 15:22:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:35,581 INFO L93 Difference]: Finished difference Result 1253 states and 1357 transitions. [2018-07-23 15:22:35,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:22:35,581 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 1227 [2018-07-23 15:22:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:35,583 INFO L225 Difference]: With dead ends: 1253 [2018-07-23 15:22:35,583 INFO L226 Difference]: Without dead ends: 1251 [2018-07-23 15:22:35,584 INFO L573 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 [2018-07-23 15:22:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2018-07-23 15:22:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1240. [2018-07-23 15:22:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-07-23 15:22:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1343 transitions. [2018-07-23 15:22:37,210 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1343 transitions. Word has length 1227 [2018-07-23 15:22:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:37,211 INFO L471 AbstractCegarLoop]: Abstraction has 1240 states and 1343 transitions. [2018-07-23 15:22:37,211 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:22:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1343 transitions. [2018-07-23 15:22:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2018-07-23 15:22:37,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:37,219 INFO L353 BasicCegarLoop]: trace histogram [1030, 103, 103, 1, 1, 1] [2018-07-23 15:22:37,219 INFO L414 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1021183799, now seen corresponding path program 112 times [2018-07-23 15:22:37,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 646634 backedges. 0 proven. 640969 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2018-07-23 15:22:38,542 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:38,542 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:22:38,542 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:22:38,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:22:38,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:22:38,544 INFO L87 Difference]: Start difference. First operand 1240 states and 1343 transitions. Second operand 106 states. [2018-07-23 15:22:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:40,335 INFO L93 Difference]: Finished difference Result 1265 states and 1370 transitions. [2018-07-23 15:22:40,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:22:40,335 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 1239 [2018-07-23 15:22:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:40,336 INFO L225 Difference]: With dead ends: 1265 [2018-07-23 15:22:40,337 INFO L226 Difference]: Without dead ends: 1263 [2018-07-23 15:22:40,337 INFO L573 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 [2018-07-23 15:22:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-07-23 15:22:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1252. [2018-07-23 15:22:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1252 states. [2018-07-23 15:22:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1356 transitions. [2018-07-23 15:22:41,990 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1356 transitions. Word has length 1239 [2018-07-23 15:22:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:41,990 INFO L471 AbstractCegarLoop]: Abstraction has 1252 states and 1356 transitions. [2018-07-23 15:22:41,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:22:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1356 transitions. [2018-07-23 15:22:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2018-07-23 15:22:41,998 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:41,998 INFO L353 BasicCegarLoop]: trace histogram [1040, 104, 104, 1, 1, 1] [2018-07-23 15:22:41,998 INFO L414 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash 517822227, now seen corresponding path program 113 times [2018-07-23 15:22:41,999 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 659256 backedges. 0 proven. 653536 refuted. 0 times theorem prover too weak. 5720 trivial. 0 not checked. [2018-07-23 15:22:43,388 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:43,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:22:43,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:22:43,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:22:43,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:22:43,390 INFO L87 Difference]: Start difference. First operand 1252 states and 1356 transitions. Second operand 107 states. [2018-07-23 15:22:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:45,144 INFO L93 Difference]: Finished difference Result 1277 states and 1383 transitions. [2018-07-23 15:22:45,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:22:45,144 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 1251 [2018-07-23 15:22:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:45,146 INFO L225 Difference]: With dead ends: 1277 [2018-07-23 15:22:45,146 INFO L226 Difference]: Without dead ends: 1275 [2018-07-23 15:22:45,147 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:22:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2018-07-23 15:22:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1264. [2018-07-23 15:22:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2018-07-23 15:22:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1369 transitions. [2018-07-23 15:22:46,858 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1369 transitions. Word has length 1251 [2018-07-23 15:22:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:46,859 INFO L471 AbstractCegarLoop]: Abstraction has 1264 states and 1369 transitions. [2018-07-23 15:22:46,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:22:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1369 transitions. [2018-07-23 15:22:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2018-07-23 15:22:46,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:46,868 INFO L353 BasicCegarLoop]: trace histogram [1050, 105, 105, 1, 1, 1] [2018-07-23 15:22:46,868 INFO L414 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash -933521827, now seen corresponding path program 114 times [2018-07-23 15:22:46,868 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 672000 backedges. 0 proven. 666225 refuted. 0 times theorem prover too weak. 5775 trivial. 0 not checked. [2018-07-23 15:22:48,342 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:48,342 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:22:48,343 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:22:48,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:22:48,343 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:22:48,344 INFO L87 Difference]: Start difference. First operand 1264 states and 1369 transitions. Second operand 108 states. [2018-07-23 15:22:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:50,319 INFO L93 Difference]: Finished difference Result 1289 states and 1396 transitions. [2018-07-23 15:22:50,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:22:50,320 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 1263 [2018-07-23 15:22:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:50,322 INFO L225 Difference]: With dead ends: 1289 [2018-07-23 15:22:50,322 INFO L226 Difference]: Without dead ends: 1287 [2018-07-23 15:22:50,323 INFO L573 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 [2018-07-23 15:22:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2018-07-23 15:22:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1276. [2018-07-23 15:22:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2018-07-23 15:22:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1382 transitions. [2018-07-23 15:22:52,038 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1382 transitions. Word has length 1263 [2018-07-23 15:22:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:52,039 INFO L471 AbstractCegarLoop]: Abstraction has 1276 states and 1382 transitions. [2018-07-23 15:22:52,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:22:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1382 transitions. [2018-07-23 15:22:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2018-07-23 15:22:52,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:52,047 INFO L353 BasicCegarLoop]: trace histogram [1060, 106, 106, 1, 1, 1] [2018-07-23 15:22:52,047 INFO L414 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1431516839, now seen corresponding path program 115 times [2018-07-23 15:22:52,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 684866 backedges. 0 proven. 679036 refuted. 0 times theorem prover too weak. 5830 trivial. 0 not checked. [2018-07-23 15:22:53,495 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:53,495 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:22:53,495 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:22:53,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:22:53,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:22:53,496 INFO L87 Difference]: Start difference. First operand 1276 states and 1382 transitions. Second operand 109 states. [2018-07-23 15:22:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:22:55,528 INFO L93 Difference]: Finished difference Result 1301 states and 1409 transitions. [2018-07-23 15:22:55,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:22:55,528 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1275 [2018-07-23 15:22:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:22:55,529 INFO L225 Difference]: With dead ends: 1301 [2018-07-23 15:22:55,529 INFO L226 Difference]: Without dead ends: 1299 [2018-07-23 15:22:55,530 INFO L573 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 [2018-07-23 15:22:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2018-07-23 15:22:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1288. [2018-07-23 15:22:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2018-07-23 15:22:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1395 transitions. [2018-07-23 15:22:57,278 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1395 transitions. Word has length 1275 [2018-07-23 15:22:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:22:57,279 INFO L471 AbstractCegarLoop]: Abstraction has 1288 states and 1395 transitions. [2018-07-23 15:22:57,279 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:22:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1395 transitions. [2018-07-23 15:22:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2018-07-23 15:22:57,287 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:22:57,287 INFO L353 BasicCegarLoop]: trace histogram [1070, 107, 107, 1, 1, 1] [2018-07-23 15:22:57,287 INFO L414 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:22:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -38094863, now seen corresponding path program 116 times [2018-07-23 15:22:57,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:22:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:22:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 697854 backedges. 0 proven. 691969 refuted. 0 times theorem prover too weak. 5885 trivial. 0 not checked. [2018-07-23 15:22:59,171 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:22:59,172 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:22:59,172 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:22:59,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:22:59,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:22:59,173 INFO L87 Difference]: Start difference. First operand 1288 states and 1395 transitions. Second operand 110 states. [2018-07-23 15:23:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:01,220 INFO L93 Difference]: Finished difference Result 1313 states and 1422 transitions. [2018-07-23 15:23:01,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:23:01,220 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 1287 [2018-07-23 15:23:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:01,222 INFO L225 Difference]: With dead ends: 1313 [2018-07-23 15:23:01,222 INFO L226 Difference]: Without dead ends: 1311 [2018-07-23 15:23:01,223 INFO L573 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 [2018-07-23 15:23:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-07-23 15:23:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1300. [2018-07-23 15:23:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1300 states. [2018-07-23 15:23:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1408 transitions. [2018-07-23 15:23:03,041 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1408 transitions. Word has length 1287 [2018-07-23 15:23:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:03,042 INFO L471 AbstractCegarLoop]: Abstraction has 1300 states and 1408 transitions. [2018-07-23 15:23:03,042 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:23:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1408 transitions. [2018-07-23 15:23:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2018-07-23 15:23:03,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:03,050 INFO L353 BasicCegarLoop]: trace histogram [1080, 108, 108, 1, 1, 1] [2018-07-23 15:23:03,050 INFO L414 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1003002427, now seen corresponding path program 117 times [2018-07-23 15:23:03,051 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 710964 backedges. 0 proven. 705024 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2018-07-23 15:23:04,548 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:04,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:23:04,549 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:23:04,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:23:04,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:23:04,550 INFO L87 Difference]: Start difference. First operand 1300 states and 1408 transitions. Second operand 111 states. [2018-07-23 15:23:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:06,661 INFO L93 Difference]: Finished difference Result 1325 states and 1435 transitions. [2018-07-23 15:23:06,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:23:06,661 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 1299 [2018-07-23 15:23:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:06,663 INFO L225 Difference]: With dead ends: 1325 [2018-07-23 15:23:06,663 INFO L226 Difference]: Without dead ends: 1323 [2018-07-23 15:23:06,664 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:23:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2018-07-23 15:23:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1312. [2018-07-23 15:23:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2018-07-23 15:23:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1421 transitions. [2018-07-23 15:23:08,504 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1421 transitions. Word has length 1299 [2018-07-23 15:23:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:08,505 INFO L471 AbstractCegarLoop]: Abstraction has 1312 states and 1421 transitions. [2018-07-23 15:23:08,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:23:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1421 transitions. [2018-07-23 15:23:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1312 [2018-07-23 15:23:08,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:08,514 INFO L353 BasicCegarLoop]: trace histogram [1090, 109, 109, 1, 1, 1] [2018-07-23 15:23:08,514 INFO L414 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1811111301, now seen corresponding path program 118 times [2018-07-23 15:23:08,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 724196 backedges. 0 proven. 718201 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2018-07-23 15:23:10,417 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:10,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:23:10,418 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:23:10,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:23:10,419 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:23:10,419 INFO L87 Difference]: Start difference. First operand 1312 states and 1421 transitions. Second operand 112 states. [2018-07-23 15:23:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:12,574 INFO L93 Difference]: Finished difference Result 1337 states and 1448 transitions. [2018-07-23 15:23:12,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:23:12,575 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 1311 [2018-07-23 15:23:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:12,576 INFO L225 Difference]: With dead ends: 1337 [2018-07-23 15:23:12,576 INFO L226 Difference]: Without dead ends: 1335 [2018-07-23 15:23:12,577 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:23:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2018-07-23 15:23:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1324. [2018-07-23 15:23:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2018-07-23 15:23:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1434 transitions. [2018-07-23 15:23:14,447 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1434 transitions. Word has length 1311 [2018-07-23 15:23:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:14,448 INFO L471 AbstractCegarLoop]: Abstraction has 1324 states and 1434 transitions. [2018-07-23 15:23:14,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:23:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1434 transitions. [2018-07-23 15:23:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2018-07-23 15:23:14,458 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:14,458 INFO L353 BasicCegarLoop]: trace histogram [1100, 110, 110, 1, 1, 1] [2018-07-23 15:23:14,458 INFO L414 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1827766735, now seen corresponding path program 119 times [2018-07-23 15:23:14,458 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 737550 backedges. 0 proven. 731500 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-07-23 15:23:15,998 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:15,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:23:15,999 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:23:15,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:23:16,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:23:16,000 INFO L87 Difference]: Start difference. First operand 1324 states and 1434 transitions. Second operand 113 states. [2018-07-23 15:23:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:18,126 INFO L93 Difference]: Finished difference Result 1349 states and 1461 transitions. [2018-07-23 15:23:18,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:23:18,126 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 1323 [2018-07-23 15:23:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:18,128 INFO L225 Difference]: With dead ends: 1349 [2018-07-23 15:23:18,128 INFO L226 Difference]: Without dead ends: 1347 [2018-07-23 15:23:18,128 INFO L573 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 [2018-07-23 15:23:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2018-07-23 15:23:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1336. [2018-07-23 15:23:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2018-07-23 15:23:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1447 transitions. [2018-07-23 15:23:20,090 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1447 transitions. Word has length 1323 [2018-07-23 15:23:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:20,090 INFO L471 AbstractCegarLoop]: Abstraction has 1336 states and 1447 transitions. [2018-07-23 15:23:20,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:23:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1447 transitions. [2018-07-23 15:23:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2018-07-23 15:23:20,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:20,100 INFO L353 BasicCegarLoop]: trace histogram [1110, 111, 111, 1, 1, 1] [2018-07-23 15:23:20,100 INFO L414 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1069123353, now seen corresponding path program 120 times [2018-07-23 15:23:20,100 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 751026 backedges. 0 proven. 744921 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2018-07-23 15:23:21,679 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:21,679 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:23:21,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:23:21,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:23:21,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:23:21,681 INFO L87 Difference]: Start difference. First operand 1336 states and 1447 transitions. Second operand 114 states. [2018-07-23 15:23:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:23,800 INFO L93 Difference]: Finished difference Result 1361 states and 1474 transitions. [2018-07-23 15:23:23,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:23:23,800 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 1335 [2018-07-23 15:23:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:23,802 INFO L225 Difference]: With dead ends: 1361 [2018-07-23 15:23:23,802 INFO L226 Difference]: Without dead ends: 1359 [2018-07-23 15:23:23,802 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:23:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-07-23 15:23:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1348. [2018-07-23 15:23:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2018-07-23 15:23:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1460 transitions. [2018-07-23 15:23:25,785 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1460 transitions. Word has length 1335 [2018-07-23 15:23:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:25,786 INFO L471 AbstractCegarLoop]: Abstraction has 1348 states and 1460 transitions. [2018-07-23 15:23:25,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:23:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1460 transitions. [2018-07-23 15:23:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2018-07-23 15:23:25,794 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:25,795 INFO L353 BasicCegarLoop]: trace histogram [1120, 112, 112, 1, 1, 1] [2018-07-23 15:23:25,795 INFO L414 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1484657309, now seen corresponding path program 121 times [2018-07-23 15:23:25,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 764624 backedges. 0 proven. 758464 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2018-07-23 15:23:27,438 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:27,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:23:27,438 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:23:27,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:23:27,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:23:27,439 INFO L87 Difference]: Start difference. First operand 1348 states and 1460 transitions. Second operand 115 states. [2018-07-23 15:23:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,630 INFO L93 Difference]: Finished difference Result 1373 states and 1487 transitions. [2018-07-23 15:23:29,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:23:29,630 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 1347 [2018-07-23 15:23:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,632 INFO L225 Difference]: With dead ends: 1373 [2018-07-23 15:23:29,632 INFO L226 Difference]: Without dead ends: 1371 [2018-07-23 15:23:29,633 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:23:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2018-07-23 15:23:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2018-07-23 15:23:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2018-07-23 15:23:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1473 transitions. [2018-07-23 15:23:31,686 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1473 transitions. Word has length 1347 [2018-07-23 15:23:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,687 INFO L471 AbstractCegarLoop]: Abstraction has 1360 states and 1473 transitions. [2018-07-23 15:23:31,687 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:23:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1473 transitions. [2018-07-23 15:23:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2018-07-23 15:23:31,696 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,696 INFO L353 BasicCegarLoop]: trace histogram [1130, 113, 113, 1, 1, 1] [2018-07-23 15:23:31,696 INFO L414 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash -910084947, now seen corresponding path program 122 times [2018-07-23 15:23:31,697 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 778344 backedges. 0 proven. 772129 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2018-07-23 15:23:33,303 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:23:33,304 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:23:33,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:23:33,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:23:33,305 INFO L87 Difference]: Start difference. First operand 1360 states and 1473 transitions. Second operand 116 states. [2018-07-23 15:23:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,700 INFO L93 Difference]: Finished difference Result 1385 states and 1500 transitions. [2018-07-23 15:23:35,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:23:35,700 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 1359 [2018-07-23 15:23:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,702 INFO L225 Difference]: With dead ends: 1385 [2018-07-23 15:23:35,702 INFO L226 Difference]: Without dead ends: 1383 [2018-07-23 15:23:35,703 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:23:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2018-07-23 15:23:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1372. [2018-07-23 15:23:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2018-07-23 15:23:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1486 transitions. [2018-07-23 15:23:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1486 transitions. Word has length 1359 [2018-07-23 15:23:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:37,787 INFO L471 AbstractCegarLoop]: Abstraction has 1372 states and 1486 transitions. [2018-07-23 15:23:37,787 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:23:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1486 transitions. [2018-07-23 15:23:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2018-07-23 15:23:37,796 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:37,796 INFO L353 BasicCegarLoop]: trace histogram [1140, 114, 114, 1, 1, 1] [2018-07-23 15:23:37,797 INFO L414 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash -835855113, now seen corresponding path program 123 times [2018-07-23 15:23:37,797 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 792186 backedges. 0 proven. 785916 refuted. 0 times theorem prover too weak. 6270 trivial. 0 not checked. [2018-07-23 15:23:39,440 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:39,441 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:23:39,441 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:23:39,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:23:39,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:23:39,442 INFO L87 Difference]: Start difference. First operand 1372 states and 1486 transitions. Second operand 117 states. [2018-07-23 15:23:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:41,891 INFO L93 Difference]: Finished difference Result 1397 states and 1513 transitions. [2018-07-23 15:23:41,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:23:41,892 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 1371 [2018-07-23 15:23:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:41,893 INFO L225 Difference]: With dead ends: 1397 [2018-07-23 15:23:41,893 INFO L226 Difference]: Without dead ends: 1395 [2018-07-23 15:23:41,895 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:23:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2018-07-23 15:23:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1384. [2018-07-23 15:23:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-07-23 15:23:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1499 transitions. [2018-07-23 15:23:44,046 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1499 transitions. Word has length 1371 [2018-07-23 15:23:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:44,046 INFO L471 AbstractCegarLoop]: Abstraction has 1384 states and 1499 transitions. [2018-07-23 15:23:44,046 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:23:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1499 transitions. [2018-07-23 15:23:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1384 [2018-07-23 15:23:44,056 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:44,056 INFO L353 BasicCegarLoop]: trace histogram [1150, 115, 115, 1, 1, 1] [2018-07-23 15:23:44,056 INFO L414 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2126407233, now seen corresponding path program 124 times [2018-07-23 15:23:44,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 806150 backedges. 0 proven. 799825 refuted. 0 times theorem prover too weak. 6325 trivial. 0 not checked. [2018-07-23 15:23:45,790 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:45,790 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:23:45,790 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:23:45,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:23:45,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:23:45,792 INFO L87 Difference]: Start difference. First operand 1384 states and 1499 transitions. Second operand 118 states. [2018-07-23 15:23:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:48,179 INFO L93 Difference]: Finished difference Result 1409 states and 1526 transitions. [2018-07-23 15:23:48,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:23:48,179 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 1383 [2018-07-23 15:23:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:48,180 INFO L225 Difference]: With dead ends: 1409 [2018-07-23 15:23:48,180 INFO L226 Difference]: Without dead ends: 1407 [2018-07-23 15:23:48,181 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:23:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-07-23 15:23:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1396. [2018-07-23 15:23:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2018-07-23 15:23:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1512 transitions. [2018-07-23 15:23:50,370 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1512 transitions. Word has length 1383 [2018-07-23 15:23:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:50,370 INFO L471 AbstractCegarLoop]: Abstraction has 1396 states and 1512 transitions. [2018-07-23 15:23:50,370 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:23:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1512 transitions. [2018-07-23 15:23:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2018-07-23 15:23:50,382 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:50,382 INFO L353 BasicCegarLoop]: trace histogram [1160, 116, 116, 1, 1, 1] [2018-07-23 15:23:50,382 INFO L414 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash -408334197, now seen corresponding path program 125 times [2018-07-23 15:23:50,382 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 820236 backedges. 0 proven. 813856 refuted. 0 times theorem prover too weak. 6380 trivial. 0 not checked. [2018-07-23 15:23:52,107 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:52,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:23:52,108 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:23:52,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:23:52,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:23:52,110 INFO L87 Difference]: Start difference. First operand 1396 states and 1512 transitions. Second operand 119 states. [2018-07-23 15:23:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:54,481 INFO L93 Difference]: Finished difference Result 1421 states and 1539 transitions. [2018-07-23 15:23:54,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:23:54,481 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 1395 [2018-07-23 15:23:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:54,483 INFO L225 Difference]: With dead ends: 1421 [2018-07-23 15:23:54,483 INFO L226 Difference]: Without dead ends: 1419 [2018-07-23 15:23:54,484 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:23:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2018-07-23 15:23:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1408. [2018-07-23 15:23:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2018-07-23 15:23:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1525 transitions. [2018-07-23 15:23:56,745 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1525 transitions. Word has length 1395 [2018-07-23 15:23:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:56,745 INFO L471 AbstractCegarLoop]: Abstraction has 1408 states and 1525 transitions. [2018-07-23 15:23:56,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:23:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1525 transitions. [2018-07-23 15:23:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1408 [2018-07-23 15:23:56,756 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:56,756 INFO L353 BasicCegarLoop]: trace histogram [1170, 117, 117, 1, 1, 1] [2018-07-23 15:23:56,756 INFO L414 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash -144368683, now seen corresponding path program 126 times [2018-07-23 15:23:56,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 834444 backedges. 0 proven. 828009 refuted. 0 times theorem prover too weak. 6435 trivial. 0 not checked. [2018-07-23 15:23:58,533 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:58,533 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:23:58,534 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:23:58,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:23:58,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:23:58,535 INFO L87 Difference]: Start difference. First operand 1408 states and 1525 transitions. Second operand 120 states. Received shutdown request... [2018-07-23 15:24:00,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:24:00,351 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:24:00,356 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:24:00,357 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:24:00 BoogieIcfgContainer [2018-07-23 15:24:00,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:24:00,358 INFO L168 Benchmark]: Toolchain (without parser) took 258249.88 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 948.0 MB in the end (delta: 500.9 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-23 15:24:00,360 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-07-23 15:24:00,360 INFO L168 Benchmark]: Boogie Preprocessor took 49.21 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. [2018-07-23 15:24:00,361 INFO L168 Benchmark]: RCFGBuilder took 232.67 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. [2018-07-23 15:24:00,361 INFO L168 Benchmark]: TraceAbstraction took 257963.70 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 948.0 MB in the end (delta: 490.3 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-23 15:24:00,363 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 0.20 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 49.21 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 232.67 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 257963.70 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 948.0 MB in the end (delta: 490.3 MB). Peak memory consumption was 2.5 GB. 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 (1408states) and interpolant automaton (currently 107 states, 120 states before enhancement), while ReachableStatesComputation was computing reachable states (1255 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 257.8s OverallTime, 128 OverallIterations, 1170 TraceHistogramMax, 93.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 520 SDtfs, 14016 SDslu, 9729 SDs, 0 SdLazy, 17005 SolverSat, 319 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7214 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7076 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1408occurred in iteration=127, 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: 81.3s AutomataMinimizationTime, 127 MinimizatonAttempts, 1246 StatesRemovedByMinimization, 117 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 5.6s SatisfiabilityAnalysisTime, 27.8s InterpolantComputationTime, 83461 NumberOfCodeBlocks, 83461 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 83333 ConstructedInterpolants, 0 QuantifiedInterpolants, 234427899 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 128 InterpolantComputations, 2 PerfectInterpolantSequences, 386967/32954796 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_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-24-00-373.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-24-00-373.csv Completed graceful shutdown