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/real-life/divisibilityWithArray.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:14:56,035 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:14:56,037 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:14:56,049 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:14:56,050 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:14:56,051 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:14:56,052 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:14:56,054 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:14:56,056 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:14:56,056 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:14:56,057 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:14:56,090 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 15:14:56,114 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:14:56,116 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:14:56,118 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:14:56,118 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:14:56,118 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:14:56,118 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:14:56,122 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:14:56,122 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:14:56,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:14:56,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:14:56,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:14:56,188 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:14:56,188 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:14:56,189 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/divisibilityWithArray.bpl [2018-07-23 15:14:56,189 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/divisibilityWithArray.bpl' [2018-07-23 15:14:56,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:14:56,238 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:14:56,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:14:56,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:14:56,239 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:14:56,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:14:56,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:14:56,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:14:56,291 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:14:56,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/1) ... [2018-07-23 15:14:56,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-23 15:14:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 15:14:56,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 15:14:56,515 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:14:56,516 INFO L202 PluginConnector]: Adding new model divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:14:56 BoogieIcfgContainer [2018-07-23 15:14:56,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:14:56,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:14:56,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:14:56,522 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:14:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:56" (1/2) ... [2018-07-23 15:14:56,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cc327e and model type divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:14:56, skipping insertion in model container [2018-07-23 15:14:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:14:56" (2/2) ... [2018-07-23 15:14:56,527 INFO L112 eAbstractionObserver]: Analyzing ICFG divisibilityWithArray.bpl [2018-07-23 15:14:56,537 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:14:56,546 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:14:56,600 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:14:56,601 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:14:56,601 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:14:56,601 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:14:56,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:14:56,602 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:14:56,602 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:14:56,602 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:14:56,602 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:14:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:14:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:14:56,628 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:56,629 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:14:56,630 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-07-23 15:14:56,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:56,885 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2018-07-23 15:14:56,919 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 15:14:56,921 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:14:56,921 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:14:56,926 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:14:56,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:14:56,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:14:56,942 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 4 states. [2018-07-23 15:14:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:56,992 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:14:56,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:14:56,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-07-23 15:14:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:57,006 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:14:57,006 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:14:57,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:14:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:14:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-07-23 15:14:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:14:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:14:57,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-07-23 15:14:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:57,062 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:14:57,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:14:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:14:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:14:57,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:57,063 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:14:57,064 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-07-23 15:14:57,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:57,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:57,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:14:57,313 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:14:57,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:14:57,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:14:57,315 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-07-23 15:14:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:57,386 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:14:57,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:14:57,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-07-23 15:14:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:57,388 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:14:57,389 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:14:57,392 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:14:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:14:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-07-23 15:14:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:14:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:14:57,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-07-23 15:14:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:57,398 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:14:57,399 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:14:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:14:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:14:57,399 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:57,400 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-07-23 15:14:57,400 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-07-23 15:14:57,400 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:57,664 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:57,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:14:57,667 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:14:57,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:14:57,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:14:57,668 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-23 15:14:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:57,730 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:14:57,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:14:57,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-23 15:14:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:57,732 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:14:57,732 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:14:57,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:14:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:14:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-07-23 15:14:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:14:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:14:57,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-07-23 15:14:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:57,746 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:14:57,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:14:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:14:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:14:57,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:57,748 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-07-23 15:14:57,749 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-07-23 15:14:57,750 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:57,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:57,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:14:57,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:14:57,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:14:57,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:14:57,924 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-07-23 15:14:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:57,980 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:14:57,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:14:57,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2018-07-23 15:14:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:57,982 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:14:57,982 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:14:57,983 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:14:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:14:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-07-23 15:14:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:14:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:14:57,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-07-23 15:14:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:57,997 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:14:57,997 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:14:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:14:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:14:57,998 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:57,999 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-07-23 15:14:57,999 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-07-23 15:14:58,000 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:58,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:58,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:14:58,155 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:14:58,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:14:58,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:14:58,156 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-07-23 15:14:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:58,207 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:14:58,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:14:58,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2018-07-23 15:14:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:58,208 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:14:58,209 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:14:58,211 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:14:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:14:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-07-23 15:14:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:14:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:14:58,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-23 15:14:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:58,221 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:14:58,221 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:14:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:14:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:14:58,222 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:58,223 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-07-23 15:14:58,223 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-07-23 15:14:58,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:58,357 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:58,358 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:14:58,358 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:14:58,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:14:58,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:14:58,361 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-07-23 15:14:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:58,452 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:14:58,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:14:58,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-07-23 15:14:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:58,454 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:14:58,454 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:14:58,456 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:14:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:14:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-07-23 15:14:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:14:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:14:58,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-23 15:14:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:58,470 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:14:58,470 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:14:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:14:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:14:58,471 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:58,471 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-07-23 15:14:58,472 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-07-23 15:14:58,474 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:58,630 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:58,630 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:14:58,630 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:14:58,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:14:58,631 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:14:58,631 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2018-07-23 15:14:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:58,705 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:14:58,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:14:58,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-07-23 15:14:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:58,707 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:14:58,707 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:14:58,708 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:14:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:14:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-07-23 15:14:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:14:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:14:58,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-23 15:14:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:58,720 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:14:58,720 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:14:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:14:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:14:58,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:58,724 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-07-23 15:14:58,724 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-07-23 15:14:58,725 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:58,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:58,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:14:58,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:14:58,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:14:58,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:14:58,892 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2018-07-23 15:14:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:58,993 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:14:58,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:14:58,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2018-07-23 15:14:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:58,994 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:14:58,995 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:14:58,995 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:14:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:14:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-23 15:14:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:14:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:14:59,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-07-23 15:14:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:59,008 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:14:59,009 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:14:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:14:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:14:59,010 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:59,010 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-07-23 15:14:59,010 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-07-23 15:14:59,011 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:59,181 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:59,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:14:59,182 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:14:59,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:14:59,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:14:59,184 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 13 states. [2018-07-23 15:14:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:59,290 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:14:59,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:14:59,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2018-07-23 15:14:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:59,293 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:14:59,293 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:14:59,294 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:14:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:14:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-07-23 15:14:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:14:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:14:59,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-07-23 15:14:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:59,315 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:14:59,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:14:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:14:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:14:59,316 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:59,316 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-07-23 15:14:59,317 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-07-23 15:14:59,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:59,515 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:59,515 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:14:59,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:14:59,519 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:14:59,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:14:59,519 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-07-23 15:14:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:59,655 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:14:59,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:14:59,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-07-23 15:14:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:59,656 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:14:59,656 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:14:59,657 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:14:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:14:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-07-23 15:14:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:14:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:14:59,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-07-23 15:14:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:59,675 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:14:59,675 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:14:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:14:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:14:59,676 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:59,676 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-07-23 15:14:59,677 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:14:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-07-23 15:14:59,677 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:59,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:59,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:14:59,899 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:14:59,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:14:59,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:14:59,900 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2018-07-23 15:15:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:00,042 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 15:15:00,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:15:00,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2018-07-23 15:15:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:00,044 INFO L225 Difference]: With dead ends: 28 [2018-07-23 15:15:00,044 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:15:00,045 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:15:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:15:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-23 15:15:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:15:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:15:00,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-07-23 15:15:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:00,069 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:15:00,070 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:15:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:15:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:15:00,071 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:00,071 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-07-23 15:15:00,071 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-07-23 15:15:00,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:00,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:00,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:15:00,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:15:00,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:15:00,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:15:00,295 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 16 states. [2018-07-23 15:15:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:00,465 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-23 15:15:00,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:15:00,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2018-07-23 15:15:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:00,466 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:15:00,467 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:15:00,467 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:15:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:15:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-07-23 15:15:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:15:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:15:00,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-07-23 15:15:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:00,492 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:15:00,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:15:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:15:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:15:00,495 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:00,495 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-07-23 15:15:00,495 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-07-23 15:15:00,496 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:00,730 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:00,731 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:15:00,731 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:15:00,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:15:00,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:15:00,732 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 17 states. [2018-07-23 15:15:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:00,920 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-23 15:15:00,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:15:00,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2018-07-23 15:15:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:00,921 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:15:00,923 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:15:00,924 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:15:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:15:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-07-23 15:15:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:15:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:15:00,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-07-23 15:15:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:00,946 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:15:00,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:15:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:15:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:15:00,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:00,948 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-07-23 15:15:00,948 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-07-23 15:15:00,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:01,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:01,266 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:15:01,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:15:01,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:15:01,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:15:01,267 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 18 states. [2018-07-23 15:15:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:01,464 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 15:15:01,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:15:01,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2018-07-23 15:15:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:01,465 INFO L225 Difference]: With dead ends: 34 [2018-07-23 15:15:01,465 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:15:01,466 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:15:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:15:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-07-23 15:15:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:15:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:15:01,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-07-23 15:15:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:01,495 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:15:01,495 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:15:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:15:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:15:01,496 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:01,496 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-07-23 15:15:01,497 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-07-23 15:15:01,497 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:01,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:01,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:15:01,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:15:01,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:15:01,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:15:01,744 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-07-23 15:15:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:01,965 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-23 15:15:01,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:15:01,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-07-23 15:15:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:01,966 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:15:01,966 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:15:01,967 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:15:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:15:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-07-23 15:15:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:15:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:15:01,998 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-07-23 15:15:01,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:01,999 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:15:01,999 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:15:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:15:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:15:02,000 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:02,000 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-07-23 15:15:02,000 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-07-23 15:15:02,001 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:02,220 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:02,220 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:15:02,221 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:15:02,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:15:02,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:15:02,222 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 20 states. [2018-07-23 15:15:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:02,427 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-23 15:15:02,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:15:02,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2018-07-23 15:15:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:02,428 INFO L225 Difference]: With dead ends: 38 [2018-07-23 15:15:02,428 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:15:02,429 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:15:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:15:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-07-23 15:15:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:15:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:15:02,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-07-23 15:15:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:02,455 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:15:02,455 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:15:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:15:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:15:02,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:02,456 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-07-23 15:15:02,457 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-07-23 15:15:02,457 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:02,714 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:02,714 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:15:02,715 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:15:02,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:15:02,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:15:02,716 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 21 states. [2018-07-23 15:15:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:02,972 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 15:15:02,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:15:02,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2018-07-23 15:15:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:02,973 INFO L225 Difference]: With dead ends: 40 [2018-07-23 15:15:02,973 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:15:02,974 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:15:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:15:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-23 15:15:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:15:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:15:03,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-07-23 15:15:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:03,012 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:15:03,012 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:15:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:15:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:15:03,013 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:03,013 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-07-23 15:15:03,014 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-07-23 15:15:03,014 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:03,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:03,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:15:03,298 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:15:03,298 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:15:03,299 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:15:03,299 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 22 states. [2018-07-23 15:15:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:03,584 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-23 15:15:03,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:15:03,584 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2018-07-23 15:15:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:03,585 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:15:03,585 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:15:03,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:15:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:15:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-07-23 15:15:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:15:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:15:03,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-07-23 15:15:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:03,621 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:15:03,621 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:15:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:15:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:15:03,625 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:03,625 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-07-23 15:15:03,625 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-07-23 15:15:03,625 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:03,913 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:03,913 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:15:03,914 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:15:03,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:15:03,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:15:03,915 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 23 states. [2018-07-23 15:15:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:04,201 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-23 15:15:04,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:15:04,202 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2018-07-23 15:15:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:04,204 INFO L225 Difference]: With dead ends: 44 [2018-07-23 15:15:04,204 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:15:04,205 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:15:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:15:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-07-23 15:15:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:15:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:15:04,242 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-07-23 15:15:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:04,243 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:15:04,243 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:15:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:15:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:15:04,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:04,244 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-07-23 15:15:04,244 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-07-23 15:15:04,246 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:04,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:04,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:15:04,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:15:04,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:15:04,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:15:04,570 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 24 states. [2018-07-23 15:15:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:04,912 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 15:15:04,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:15:04,913 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2018-07-23 15:15:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:04,915 INFO L225 Difference]: With dead ends: 46 [2018-07-23 15:15:04,915 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:15:04,915 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:15:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:15:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-23 15:15:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:15:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:15:04,961 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-07-23 15:15:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:04,961 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:15:04,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:15:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:15:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:15:04,965 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:04,965 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-07-23 15:15:04,966 INFO L414 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-07-23 15:15:04,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:05,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:05,286 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:15:05,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:15:05,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:15:05,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:15:05,287 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 25 states. [2018-07-23 15:15:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:05,605 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-23 15:15:05,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:15:05,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-07-23 15:15:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:05,606 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:15:05,607 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:15:05,607 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:15:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:15:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-07-23 15:15:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:15:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:15:05,651 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-07-23 15:15:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:05,652 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:15:05,652 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:15:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:15:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:15:05,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:05,653 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-07-23 15:15:05,653 INFO L414 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-07-23 15:15:05,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:06,004 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:06,005 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:15:06,005 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:15:06,005 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:15:06,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:15:06,006 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 26 states. [2018-07-23 15:15:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:06,344 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-23 15:15:06,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:15:06,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2018-07-23 15:15:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:06,345 INFO L225 Difference]: With dead ends: 50 [2018-07-23 15:15:06,345 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:15:06,349 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:15:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:15:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-07-23 15:15:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:15:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:15:06,388 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-07-23 15:15:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:06,388 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:15:06,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:15:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:15:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:15:06,389 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:06,389 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-07-23 15:15:06,390 INFO L414 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-07-23 15:15:06,390 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:06,726 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:06,726 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:15:06,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:15:06,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:15:06,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:15:06,728 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 27 states. [2018-07-23 15:15:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:07,114 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 15:15:07,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:15:07,115 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2018-07-23 15:15:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:07,116 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:15:07,116 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:15:07,116 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:15:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:15:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-07-23 15:15:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:15:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:15:07,175 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-07-23 15:15:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:07,175 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:15:07,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:15:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:15:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:15:07,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:07,176 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-07-23 15:15:07,176 INFO L414 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:07,176 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-07-23 15:15:07,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:07,521 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:07,521 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:15:07,522 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:15:07,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:15:07,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:15:07,523 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 28 states. [2018-07-23 15:15:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:07,932 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-23 15:15:07,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:15:07,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2018-07-23 15:15:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:07,934 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:15:07,934 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:15:07,935 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:15:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:15:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-07-23 15:15:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:15:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:15:08,000 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-07-23 15:15:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:08,001 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:15:08,001 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:15:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:15:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:15:08,002 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:08,002 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-07-23 15:15:08,002 INFO L414 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-07-23 15:15:08,003 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:08,415 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:08,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:15:08,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:15:08,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:15:08,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:15:08,417 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 29 states. [2018-07-23 15:15:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:08,860 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-23 15:15:08,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:15:08,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 51 [2018-07-23 15:15:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:08,861 INFO L225 Difference]: With dead ends: 56 [2018-07-23 15:15:08,861 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:15:08,862 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:15:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:15:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-07-23 15:15:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:15:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:15:08,916 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-07-23 15:15:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:08,917 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:15:08,917 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:15:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:15:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:15:08,918 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:08,918 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-07-23 15:15:08,918 INFO L414 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-07-23 15:15:08,918 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:09,272 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:09,272 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:15:09,272 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:15:09,273 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:15:09,273 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:15:09,273 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 30 states. [2018-07-23 15:15:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:09,697 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 15:15:09,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:15:09,699 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 53 [2018-07-23 15:15:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:09,699 INFO L225 Difference]: With dead ends: 58 [2018-07-23 15:15:09,699 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:15:09,700 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:15:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:15:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-07-23 15:15:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:15:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:15:09,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-07-23 15:15:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:09,753 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:15:09,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:15:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:15:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:15:09,753 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:09,754 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-07-23 15:15:09,754 INFO L414 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-07-23 15:15:09,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:10,109 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:10,109 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:15:10,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:15:10,110 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:15:10,110 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:15:10,111 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 31 states. [2018-07-23 15:15:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:10,546 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-23 15:15:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:15:10,546 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 55 [2018-07-23 15:15:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:10,547 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:15:10,547 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:15:10,548 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:15:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:15:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-07-23 15:15:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:15:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:15:10,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-07-23 15:15:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:10,606 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:15:10,606 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:15:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:15:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:15:10,607 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:10,607 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-07-23 15:15:10,607 INFO L414 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-07-23 15:15:10,608 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:11,005 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:11,005 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:15:11,006 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:15:11,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:15:11,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:15:11,007 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 32 states. [2018-07-23 15:15:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:11,473 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-23 15:15:11,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:15:11,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 57 [2018-07-23 15:15:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:11,474 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:15:11,474 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:15:11,475 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:15:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:15:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-07-23 15:15:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:15:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:15:11,533 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-07-23 15:15:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:11,534 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:15:11,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:15:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:15:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:15:11,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:11,535 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-07-23 15:15:11,535 INFO L414 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-07-23 15:15:11,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:11,916 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:11,916 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:15:11,917 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:15:11,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:15:11,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:15:11,918 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 33 states. [2018-07-23 15:15:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:12,458 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 15:15:12,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:15:12,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 59 [2018-07-23 15:15:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:12,459 INFO L225 Difference]: With dead ends: 64 [2018-07-23 15:15:12,459 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:15:12,460 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:15:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:15:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-07-23 15:15:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:15:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:15:12,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-07-23 15:15:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:12,532 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:15:12,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:15:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:15:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:15:12,533 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:12,533 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-07-23 15:15:12,534 INFO L414 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-07-23 15:15:12,534 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:13,000 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:13,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:15:13,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:15:13,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:15:13,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:15:13,002 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 34 states. [2018-07-23 15:15:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:13,474 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-23 15:15:13,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:15:13,474 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 61 [2018-07-23 15:15:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:13,475 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:15:13,475 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:15:13,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:15:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:15:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-07-23 15:15:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:15:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:15:13,529 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-07-23 15:15:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:13,529 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:15:13,529 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:15:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:15:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:15:13,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:13,530 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-07-23 15:15:13,530 INFO L414 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-07-23 15:15:13,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:13,907 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:13,907 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:15:13,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:15:13,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:15:13,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:15:13,909 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 35 states. [2018-07-23 15:15:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:14,421 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-23 15:15:14,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:15:14,421 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 63 [2018-07-23 15:15:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:14,422 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:15:14,422 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:15:14,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:15:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:15:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-07-23 15:15:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:15:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:15:14,481 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-07-23 15:15:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:14,482 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:15:14,482 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:15:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:15:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:15:14,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:14,483 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-07-23 15:15:14,483 INFO L414 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-07-23 15:15:14,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:14,889 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:14,889 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:15:14,889 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:15:14,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:15:14,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:15:14,891 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 36 states. [2018-07-23 15:15:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:15,422 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 15:15:15,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:15:15,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2018-07-23 15:15:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:15,423 INFO L225 Difference]: With dead ends: 70 [2018-07-23 15:15:15,423 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:15:15,424 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:15:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:15:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-07-23 15:15:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:15:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:15:15,481 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-07-23 15:15:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:15,482 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:15:15,482 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:15:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:15:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:15:15,483 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:15,483 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-07-23 15:15:15,483 INFO L414 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-07-23 15:15:15,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:15,888 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:15,888 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:15:15,888 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:15:15,889 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:15:15,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:15:15,890 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 37 states. [2018-07-23 15:15:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:16,462 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-23 15:15:16,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:15:16,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2018-07-23 15:15:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:16,463 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:15:16,463 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:15:16,464 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:15:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:15:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-07-23 15:15:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:15:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:15:16,526 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-07-23 15:15:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:16,527 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:15:16,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:15:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:15:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:15:16,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:16,528 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-07-23 15:15:16,528 INFO L414 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-07-23 15:15:16,530 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:16,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:16,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:15:16,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:15:16,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:15:16,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:15:16,954 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 38 states. [2018-07-23 15:15:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:17,515 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-23 15:15:17,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:15:17,515 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 69 [2018-07-23 15:15:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:17,516 INFO L225 Difference]: With dead ends: 74 [2018-07-23 15:15:17,516 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:15:17,517 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:15:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:15:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-07-23 15:15:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:15:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:15:17,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-07-23 15:15:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:17,584 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:15:17,584 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:15:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:15:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:15:17,585 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:17,585 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-07-23 15:15:17,585 INFO L414 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-07-23 15:15:17,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:18,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:18,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:15:18,033 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:15:18,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:15:18,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:15:18,035 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 39 states. [2018-07-23 15:15:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:18,657 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 15:15:18,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:15:18,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 71 [2018-07-23 15:15:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:18,658 INFO L225 Difference]: With dead ends: 76 [2018-07-23 15:15:18,658 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:15:18,659 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:15:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:15:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-07-23 15:15:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:15:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:15:18,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-07-23 15:15:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:18,733 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:15:18,733 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:15:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:15:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:15:18,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:18,734 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-07-23 15:15:18,735 INFO L414 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-07-23 15:15:18,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:19,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:19,205 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:15:19,206 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:15:19,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:15:19,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:15:19,207 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 40 states. [2018-07-23 15:15:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:19,869 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-23 15:15:19,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:15:19,869 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 73 [2018-07-23 15:15:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:19,870 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:15:19,870 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:15:19,872 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:15:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:15:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-07-23 15:15:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:15:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:15:19,950 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-07-23 15:15:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:19,950 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:15:19,950 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:15:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:15:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:15:19,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:19,951 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-07-23 15:15:19,952 INFO L414 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-07-23 15:15:19,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:20,519 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:20,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:15:20,519 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:15:20,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:15:20,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:15:20,521 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 41 states. [2018-07-23 15:15:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:21,163 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-23 15:15:21,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:15:21,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2018-07-23 15:15:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:21,165 INFO L225 Difference]: With dead ends: 80 [2018-07-23 15:15:21,165 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:15:21,166 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:15:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:15:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-07-23 15:15:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:15:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:15:21,248 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-07-23 15:15:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:21,248 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:15:21,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:15:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:15:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:15:21,249 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:21,249 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-07-23 15:15:21,251 INFO L414 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-07-23 15:15:21,252 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:21,712 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:21,712 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:15:21,712 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:15:21,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:15:21,713 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:15:21,714 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 42 states. [2018-07-23 15:15:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:22,372 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 15:15:22,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:15:22,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 77 [2018-07-23 15:15:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:22,373 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:15:22,373 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:15:22,374 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:15:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:15:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-07-23 15:15:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:15:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:15:22,454 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-07-23 15:15:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:22,454 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:15:22,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:15:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:15:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:15:22,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:22,455 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-07-23 15:15:22,455 INFO L414 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-07-23 15:15:22,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:22,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:22,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:15:22,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:15:22,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:15:22,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:15:22,928 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 43 states. [2018-07-23 15:15:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:23,601 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-23 15:15:23,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:15:23,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2018-07-23 15:15:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:23,603 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:15:23,603 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:15:23,604 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:15:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:15:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-07-23 15:15:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:15:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:15:23,676 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-07-23 15:15:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:23,677 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:15:23,677 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:15:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:15:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:15:23,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:23,678 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-07-23 15:15:23,678 INFO L414 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-07-23 15:15:23,678 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:24,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:24,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:15:24,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:15:24,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:15:24,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:15:24,115 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 44 states. [2018-07-23 15:15:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:24,657 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-23 15:15:24,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:15:24,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 81 [2018-07-23 15:15:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:24,658 INFO L225 Difference]: With dead ends: 86 [2018-07-23 15:15:24,658 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:15:24,659 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:15:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:15:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-07-23 15:15:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:15:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:15:24,733 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-07-23 15:15:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:24,734 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:15:24,734 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:15:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:15:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:15:24,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:24,735 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-07-23 15:15:24,735 INFO L414 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-07-23 15:15:24,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:25,189 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:25,189 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:15:25,190 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:15:25,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:15:25,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:15:25,194 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 45 states. [2018-07-23 15:15:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:25,873 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 15:15:25,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:15:25,873 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 83 [2018-07-23 15:15:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:25,874 INFO L225 Difference]: With dead ends: 88 [2018-07-23 15:15:25,874 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:15:25,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:15:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:15:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-07-23 15:15:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:15:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:15:25,957 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-07-23 15:15:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:25,958 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:15:25,958 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:15:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:15:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:15:25,959 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:25,959 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-07-23 15:15:25,959 INFO L414 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-07-23 15:15:25,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:26,461 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:26,461 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:15:26,462 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:15:26,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:15:26,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:15:26,465 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 46 states. [2018-07-23 15:15:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:27,205 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-23 15:15:27,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:15:27,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 85 [2018-07-23 15:15:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:27,206 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:15:27,207 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:15:27,207 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:15:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:15:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-07-23 15:15:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:15:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:15:27,265 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-07-23 15:15:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:27,266 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:15:27,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:15:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:15:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:15:27,266 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:27,266 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-07-23 15:15:27,267 INFO L414 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-07-23 15:15:27,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:27,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:27,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:15:27,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:15:27,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:15:27,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:15:27,937 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 47 states. [2018-07-23 15:15:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:28,668 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-23 15:15:28,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:15:28,668 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 87 [2018-07-23 15:15:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:28,669 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:15:28,669 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:15:28,670 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:15:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:15:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-07-23 15:15:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:15:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:15:28,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-07-23 15:15:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:28,747 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:15:28,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:15:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:15:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:15:28,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:28,748 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-07-23 15:15:28,749 INFO L414 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-07-23 15:15:28,749 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:29,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:29,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:15:29,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:15:29,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:15:29,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:15:29,239 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 48 states. [2018-07-23 15:15:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:30,061 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 15:15:30,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:15:30,061 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 89 [2018-07-23 15:15:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:30,062 INFO L225 Difference]: With dead ends: 94 [2018-07-23 15:15:30,062 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:15:30,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:15:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:15:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-07-23 15:15:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:15:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:15:30,164 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-07-23 15:15:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:30,164 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:15:30,164 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:15:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:15:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:15:30,165 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:30,166 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-07-23 15:15:30,166 INFO L414 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:30,166 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-07-23 15:15:30,166 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:30,777 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:30,778 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:15:30,778 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:15:30,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:15:30,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:15:30,779 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 49 states. [2018-07-23 15:15:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:31,575 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-23 15:15:31,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:15:31,576 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 91 [2018-07-23 15:15:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:31,577 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:15:31,577 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:15:31,577 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:15:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:15:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-07-23 15:15:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:15:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:15:31,653 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-07-23 15:15:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:31,653 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:15:31,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:15:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:15:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:15:31,654 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:31,655 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-07-23 15:15:31,655 INFO L414 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-07-23 15:15:31,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:32,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:32,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:15:32,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:15:32,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:15:32,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:15:32,238 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 50 states. [2018-07-23 15:15:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:32,853 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-23 15:15:32,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:15:32,853 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 93 [2018-07-23 15:15:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:32,854 INFO L225 Difference]: With dead ends: 98 [2018-07-23 15:15:32,854 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:15:32,855 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:15:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:15:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-07-23 15:15:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:15:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:15:32,941 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-07-23 15:15:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:32,942 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:15:32,942 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:15:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:15:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:15:32,943 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:32,943 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-07-23 15:15:32,943 INFO L414 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-07-23 15:15:32,944 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:33,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:33,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:15:33,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:15:33,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:15:33,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:15:33,423 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 51 states. [2018-07-23 15:15:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:34,060 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 15:15:34,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:15:34,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 95 [2018-07-23 15:15:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:34,061 INFO L225 Difference]: With dead ends: 100 [2018-07-23 15:15:34,061 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:15:34,062 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:15:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:15:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-07-23 15:15:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:15:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:15:34,149 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-07-23 15:15:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:34,150 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:15:34,150 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:15:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:15:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:15:34,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:34,151 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-07-23 15:15:34,151 INFO L414 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-07-23 15:15:34,151 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:34,624 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:34,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:15:34,624 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:15:34,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:15:34,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:15:34,625 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 52 states. [2018-07-23 15:15:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:35,374 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-23 15:15:35,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:15:35,375 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 97 [2018-07-23 15:15:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:35,375 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:15:35,375 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:15:35,376 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:15:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:15:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-07-23 15:15:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:15:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:15:35,450 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-07-23 15:15:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:35,450 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:15:35,450 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:15:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:15:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:15:35,451 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:35,452 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-07-23 15:15:35,452 INFO L414 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-07-23 15:15:35,452 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:35,894 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:35,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:15:35,895 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:15:35,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:15:35,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:15:35,896 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 53 states. [2018-07-23 15:15:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:36,504 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-23 15:15:36,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:15:36,505 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 99 [2018-07-23 15:15:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:36,505 INFO L225 Difference]: With dead ends: 104 [2018-07-23 15:15:36,506 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:15:36,506 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:15:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:15:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-07-23 15:15:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:15:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:15:36,574 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-07-23 15:15:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:36,575 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:15:36,575 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:15:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:15:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:15:36,575 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:36,575 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-07-23 15:15:36,576 INFO L414 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:36,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-07-23 15:15:36,576 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:37,073 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:37,073 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:15:37,074 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:15:37,074 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:15:37,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:15:37,074 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 54 states. [2018-07-23 15:15:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:37,974 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 15:15:37,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:15:37,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 101 [2018-07-23 15:15:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:37,975 INFO L225 Difference]: With dead ends: 106 [2018-07-23 15:15:37,976 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:15:37,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:15:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:15:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-07-23 15:15:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:15:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:15:38,057 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-07-23 15:15:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:38,058 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:15:38,058 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:15:38,058 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:15:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:15:38,058 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:38,058 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-07-23 15:15:38,058 INFO L414 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-07-23 15:15:38,059 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:38,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:38,613 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:15:38,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:15:38,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:15:38,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:15:38,614 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 55 states. [2018-07-23 15:15:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:39,306 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-23 15:15:39,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:15:39,307 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 103 [2018-07-23 15:15:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:39,307 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:15:39,307 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:15:39,308 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:15:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:15:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-07-23 15:15:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:15:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:15:39,400 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-07-23 15:15:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:39,400 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:15:39,400 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:15:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:15:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:15:39,401 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:39,401 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-07-23 15:15:39,402 INFO L414 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:39,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-07-23 15:15:39,402 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:39,949 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:39,949 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:15:39,949 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:15:39,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:15:39,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:15:39,950 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 56 states. [2018-07-23 15:15:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:40,701 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-23 15:15:40,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:15:40,702 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 105 [2018-07-23 15:15:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:40,702 INFO L225 Difference]: With dead ends: 110 [2018-07-23 15:15:40,702 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:15:40,703 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:15:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:15:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-07-23 15:15:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:15:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:15:40,794 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-07-23 15:15:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:40,794 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:15:40,794 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:15:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:15:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:15:40,795 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:40,795 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-07-23 15:15:40,795 INFO L414 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-07-23 15:15:40,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:41,352 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:41,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:15:41,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:15:41,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:15:41,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:15:41,353 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 57 states. [2018-07-23 15:15:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:42,278 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 15:15:42,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:15:42,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 107 [2018-07-23 15:15:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:42,279 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:15:42,279 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:15:42,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:15:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:15:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-07-23 15:15:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:15:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:15:42,381 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-07-23 15:15:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:42,381 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:15:42,381 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:15:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:15:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:15:42,381 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:42,382 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-07-23 15:15:42,382 INFO L414 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-07-23 15:15:42,382 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:43,194 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:43,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:15:43,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:15:43,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:15:43,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:15:43,195 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 58 states. [2018-07-23 15:15:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:44,249 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-23 15:15:44,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:15:44,249 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 109 [2018-07-23 15:15:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:44,250 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:15:44,251 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:15:44,251 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:15:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:15:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-07-23 15:15:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:15:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:15:44,337 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-07-23 15:15:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:44,338 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:15:44,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:15:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:15:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:15:44,338 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:44,338 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-07-23 15:15:44,338 INFO L414 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-07-23 15:15:44,339 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:44,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:44,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:15:44,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:15:44,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:15:44,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:15:44,937 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 59 states. [2018-07-23 15:15:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:45,756 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-23 15:15:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:15:45,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 111 [2018-07-23 15:15:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:45,757 INFO L225 Difference]: With dead ends: 116 [2018-07-23 15:15:45,757 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:15:45,758 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:15:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:15:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-07-23 15:15:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:15:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:15:45,859 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-07-23 15:15:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:45,860 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:15:45,860 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:15:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:15:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:15:45,861 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:45,861 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-07-23 15:15:45,861 INFO L414 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-07-23 15:15:45,861 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:46,445 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:46,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:15:46,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:15:46,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:15:46,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:15:46,446 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 60 states. [2018-07-23 15:15:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:47,245 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 15:15:47,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:15:47,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 113 [2018-07-23 15:15:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:47,246 INFO L225 Difference]: With dead ends: 118 [2018-07-23 15:15:47,246 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:15:47,247 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:15:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:15:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-07-23 15:15:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:15:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:15:47,362 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-07-23 15:15:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:47,362 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:15:47,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:15:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:15:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:15:47,363 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:47,363 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-07-23 15:15:47,363 INFO L414 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-07-23 15:15:47,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:48,161 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:48,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:15:48,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:15:48,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:15:48,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:15:48,163 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 61 states. [2018-07-23 15:15:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:49,084 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-23 15:15:49,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:15:49,084 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 115 [2018-07-23 15:15:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:49,085 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:15:49,085 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:15:49,085 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:15:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:15:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-07-23 15:15:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:15:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:15:49,189 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-07-23 15:15:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:49,190 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:15:49,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:15:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:15:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:15:49,190 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:49,190 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-07-23 15:15:49,191 INFO L414 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:49,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-07-23 15:15:49,191 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:49,869 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:49,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:15:49,869 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:15:49,870 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:15:49,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:15:49,870 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 62 states. [2018-07-23 15:15:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:50,797 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-23 15:15:50,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:15:50,797 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 117 [2018-07-23 15:15:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:50,798 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:15:50,798 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:15:50,799 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:15:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:15:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2018-07-23 15:15:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:15:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:15:50,901 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-07-23 15:15:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:50,901 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:15:50,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:15:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:15:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:15:50,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:50,902 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-07-23 15:15:50,902 INFO L414 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-07-23 15:15:50,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:51,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:51,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:15:51,482 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:15:51,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:15:51,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:15:51,483 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 63 states. [2018-07-23 15:15:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:52,410 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 15:15:52,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:15:52,410 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 119 [2018-07-23 15:15:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:52,411 INFO L225 Difference]: With dead ends: 124 [2018-07-23 15:15:52,411 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:15:52,412 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:15:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:15:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-07-23 15:15:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:15:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:15:52,535 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-07-23 15:15:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:52,536 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:15:52,536 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:15:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:15:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:15:52,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:52,537 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-07-23 15:15:52,537 INFO L414 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-07-23 15:15:52,537 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:53,127 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:53,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:15:53,128 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:15:53,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:15:53,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:15:53,129 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 64 states. [2018-07-23 15:15:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:54,161 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-23 15:15:54,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:15:54,161 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 121 [2018-07-23 15:15:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:54,162 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:15:54,162 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:15:54,163 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:15:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:15:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-07-23 15:15:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:15:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:15:54,272 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-07-23 15:15:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:54,272 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:15:54,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:15:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:15:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:15:54,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:54,273 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-07-23 15:15:54,273 INFO L414 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-07-23 15:15:54,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:55,158 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:55,158 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:15:55,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:15:55,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:15:55,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:15:55,159 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 65 states. [2018-07-23 15:15:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:56,295 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-23 15:15:56,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:15:56,296 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 123 [2018-07-23 15:15:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:56,297 INFO L225 Difference]: With dead ends: 128 [2018-07-23 15:15:56,297 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:15:56,297 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:15:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:15:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-07-23 15:15:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:15:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:15:56,412 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-07-23 15:15:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:56,412 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:15:56,412 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:15:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:15:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:15:56,413 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:56,413 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-07-23 15:15:56,413 INFO L414 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-07-23 15:15:56,413 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:57,089 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:57,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:15:57,090 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:15:57,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:15:57,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:15:57,090 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 66 states. [2018-07-23 15:15:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:58,287 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 15:15:58,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:15:58,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 125 [2018-07-23 15:15:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:58,287 INFO L225 Difference]: With dead ends: 130 [2018-07-23 15:15:58,288 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:15:58,288 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:15:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:15:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-07-23 15:15:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:15:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:15:58,412 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-07-23 15:15:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:58,413 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:15:58,413 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:15:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:15:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:15:58,413 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:58,414 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-07-23 15:15:58,414 INFO L414 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:15:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-07-23 15:15:58,414 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:59,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:59,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:15:59,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:15:59,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:15:59,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:15:59,008 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 67 states. [2018-07-23 15:16:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:00,013 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-23 15:16:00,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:16:00,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 127 [2018-07-23 15:16:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:00,014 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:16:00,014 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:16:00,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:16:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:16:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-07-23 15:16:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:16:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:16:00,123 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-07-23 15:16:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:00,123 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:16:00,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:16:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:16:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:16:00,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:00,124 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-07-23 15:16:00,125 INFO L414 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-07-23 15:16:00,125 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:00,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:00,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:16:00,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:16:00,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:16:00,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:16:00,758 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 68 states. [2018-07-23 15:16:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:01,834 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-23 15:16:01,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:16:01,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 129 [2018-07-23 15:16:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:01,835 INFO L225 Difference]: With dead ends: 134 [2018-07-23 15:16:01,835 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:16:01,835 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:16:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:16:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2018-07-23 15:16:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:16:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:16:01,966 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-07-23 15:16:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:01,966 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:16:01,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:16:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:16:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:16:01,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:01,967 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-07-23 15:16:01,967 INFO L414 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-07-23 15:16:01,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:02,555 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:02,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:16:02,555 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:16:02,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:16:02,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:16:02,556 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 69 states. [2018-07-23 15:16:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:03,599 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 15:16:03,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:16:03,600 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 131 [2018-07-23 15:16:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:03,601 INFO L225 Difference]: With dead ends: 136 [2018-07-23 15:16:03,601 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:16:03,602 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:16:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:16:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-07-23 15:16:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:16:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:16:03,737 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-07-23 15:16:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:03,737 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:16:03,737 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:16:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:16:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:16:03,738 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:03,738 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-07-23 15:16:03,738 INFO L414 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-07-23 15:16:03,739 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:04,401 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:04,401 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:16:04,402 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:16:04,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:16:04,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:16:04,402 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 70 states. [2018-07-23 15:16:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:05,491 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-23 15:16:05,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:16:05,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 133 [2018-07-23 15:16:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:05,492 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:16:05,492 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:16:05,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:16:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:16:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2018-07-23 15:16:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:16:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:16:05,674 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-07-23 15:16:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:05,675 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:16:05,675 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:16:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:16:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:16:05,675 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:05,676 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-07-23 15:16:05,676 INFO L414 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-07-23 15:16:05,676 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:06,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:06,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:16:06,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:16:06,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:16:06,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:16:06,424 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 71 states. [2018-07-23 15:16:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:07,547 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-23 15:16:07,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:16:07,548 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 135 [2018-07-23 15:16:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:07,548 INFO L225 Difference]: With dead ends: 140 [2018-07-23 15:16:07,549 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:16:07,549 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:16:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:16:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2018-07-23 15:16:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:16:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:16:07,666 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-07-23 15:16:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:07,666 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:16:07,667 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:16:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:16:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:16:07,667 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:07,667 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-07-23 15:16:07,667 INFO L414 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-07-23 15:16:07,668 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:08,335 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:08,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:16:08,335 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:16:08,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:16:08,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:16:08,336 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 72 states. [2018-07-23 15:16:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:09,553 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 15:16:09,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:16:09,553 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 137 [2018-07-23 15:16:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:09,554 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:16:09,554 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:16:09,555 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:16:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:16:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-07-23 15:16:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:16:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:16:09,796 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-07-23 15:16:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:09,796 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:16:09,796 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:16:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:16:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:16:09,797 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:09,797 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-07-23 15:16:09,798 INFO L414 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-07-23 15:16:09,798 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:10,552 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:10,552 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:16:10,553 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:16:10,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:16:10,553 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:16:10,553 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 73 states. [2018-07-23 15:16:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:11,803 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-23 15:16:11,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:16:11,803 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 139 [2018-07-23 15:16:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:11,804 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:16:11,804 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:16:11,804 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:16:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:16:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-07-23 15:16:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:16:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:16:11,942 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-07-23 15:16:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:11,942 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:16:11,942 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:16:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:16:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:16:11,943 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:11,943 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-07-23 15:16:11,944 INFO L414 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-07-23 15:16:11,944 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:13,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:13,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:16:13,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:16:13,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:16:13,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:16:13,160 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 74 states. [2018-07-23 15:16:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:14,564 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-23 15:16:14,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:16:14,565 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 141 [2018-07-23 15:16:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:14,566 INFO L225 Difference]: With dead ends: 146 [2018-07-23 15:16:14,566 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:16:14,566 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:16:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:16:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2018-07-23 15:16:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:16:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:16:14,704 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-07-23 15:16:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:14,704 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:16:14,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:16:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:16:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:16:14,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:14,706 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-07-23 15:16:14,706 INFO L414 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-07-23 15:16:14,706 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:15,425 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:15,426 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:16:15,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:16:15,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:16:15,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:16:15,427 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 75 states. [2018-07-23 15:16:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:16,614 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 15:16:16,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:16:16,615 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 143 [2018-07-23 15:16:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:16,615 INFO L225 Difference]: With dead ends: 148 [2018-07-23 15:16:16,615 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:16:16,616 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:16:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:16:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-07-23 15:16:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:16:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:16:16,750 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-07-23 15:16:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:16,750 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:16:16,750 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:16:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:16:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:16:16,751 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:16,751 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-07-23 15:16:16,751 INFO L414 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-07-23 15:16:16,752 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:17,642 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:17,642 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:16:17,643 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:16:17,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:16:17,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:16:17,644 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 76 states. [2018-07-23 15:16:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:18,948 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-23 15:16:18,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:16:18,948 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 145 [2018-07-23 15:16:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:18,949 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:16:18,949 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:16:18,950 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:16:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:16:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2018-07-23 15:16:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:16:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:16:19,126 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-07-23 15:16:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:19,127 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:16:19,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:16:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:16:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:16:19,127 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:19,127 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-07-23 15:16:19,128 INFO L414 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-07-23 15:16:19,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:19,980 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:19,980 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:16:19,980 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:16:19,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:16:19,981 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:16:19,981 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 77 states. [2018-07-23 15:16:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:21,381 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-23 15:16:21,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:16:21,381 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 147 [2018-07-23 15:16:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:21,382 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:16:21,382 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:16:21,383 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:16:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:16:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2018-07-23 15:16:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:16:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:16:21,530 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-07-23 15:16:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:21,530 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:16:21,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:16:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:16:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:16:21,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:21,531 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-07-23 15:16:21,531 INFO L414 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-07-23 15:16:21,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:22,311 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:22,311 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:16:22,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:16:22,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:16:22,313 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:16:22,313 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 78 states. [2018-07-23 15:16:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:23,776 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 15:16:23,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:16:23,776 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 149 [2018-07-23 15:16:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:23,777 INFO L225 Difference]: With dead ends: 154 [2018-07-23 15:16:23,777 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:16:23,778 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:16:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:16:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-07-23 15:16:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:16:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:16:23,939 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-07-23 15:16:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:23,940 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:16:23,940 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:16:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:16:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:16:23,941 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:23,941 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-07-23 15:16:23,941 INFO L414 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-07-23 15:16:23,941 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:24,752 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:24,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:16:24,753 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:16:24,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:16:24,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:16:24,753 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 79 states. [2018-07-23 15:16:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:26,217 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-23 15:16:26,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:16:26,217 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 151 [2018-07-23 15:16:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:26,218 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:16:26,218 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:16:26,218 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:16:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:16:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2018-07-23 15:16:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:16:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:16:26,397 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-07-23 15:16:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:26,397 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:16:26,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:16:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:16:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:16:26,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:26,398 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-07-23 15:16:26,398 INFO L414 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-07-23 15:16:26,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:27,315 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:27,316 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:16:27,316 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:16:27,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:16:27,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:16:27,317 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 80 states. [2018-07-23 15:16:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:28,791 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-23 15:16:28,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:16:28,791 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 153 [2018-07-23 15:16:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:28,792 INFO L225 Difference]: With dead ends: 158 [2018-07-23 15:16:28,792 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:16:28,792 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:16:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:16:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2018-07-23 15:16:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:16:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:16:29,038 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-07-23 15:16:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:29,038 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:16:29,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:16:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:16:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:16:29,039 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:29,040 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-07-23 15:16:29,040 INFO L414 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:29,040 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-07-23 15:16:29,040 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:30,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:30,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:16:30,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:16:30,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:16:30,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:16:30,058 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 81 states. [2018-07-23 15:16:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:31,652 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 15:16:31,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:16:31,652 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 155 [2018-07-23 15:16:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:31,653 INFO L225 Difference]: With dead ends: 160 [2018-07-23 15:16:31,653 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:16:31,654 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:16:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:16:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-07-23 15:16:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:16:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:16:31,812 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-07-23 15:16:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:31,812 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:16:31,812 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:16:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:16:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:16:31,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:31,813 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-07-23 15:16:31,813 INFO L414 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-07-23 15:16:31,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:32,786 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:32,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:16:32,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:16:32,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:16:32,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:16:32,787 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 82 states. [2018-07-23 15:16:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:34,343 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-23 15:16:34,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:16:34,343 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 157 [2018-07-23 15:16:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:34,344 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:16:34,344 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:16:34,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:16:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:16:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2018-07-23 15:16:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:16:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:16:34,505 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-07-23 15:16:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:34,506 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:16:34,506 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:16:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:16:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:16:34,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:34,506 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-07-23 15:16:34,507 INFO L414 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-07-23 15:16:34,507 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:35,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:35,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:16:35,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:16:35,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:16:35,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6642, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:16:35,485 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 83 states. [2018-07-23 15:16:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:37,227 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-23 15:16:37,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:16:37,227 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 159 [2018-07-23 15:16:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:37,228 INFO L225 Difference]: With dead ends: 164 [2018-07-23 15:16:37,228 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:16:37,228 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=6642, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:16:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:16:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2018-07-23 15:16:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:16:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:16:37,400 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-07-23 15:16:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:37,401 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:16:37,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:16:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:16:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:16:37,401 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:37,401 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-07-23 15:16:37,401 INFO L414 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-07-23 15:16:37,402 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:38,329 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:38,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:16:38,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:16:38,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:16:38,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:16:38,330 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 84 states. [2018-07-23 15:16:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:39,990 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 15:16:39,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:16:39,990 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 161 [2018-07-23 15:16:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:39,991 INFO L225 Difference]: With dead ends: 166 [2018-07-23 15:16:39,991 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:16:39,992 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:16:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:16:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-07-23 15:16:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:16:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:16:40,172 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-07-23 15:16:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:40,172 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:16:40,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:16:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:16:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:16:40,173 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:40,173 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-07-23 15:16:40,173 INFO L414 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-07-23 15:16:40,173 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:41,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:41,239 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:16:41,239 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:16:41,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:16:41,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6972, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:16:41,240 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 85 states. [2018-07-23 15:16:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:42,933 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-23 15:16:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:16:42,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 163 [2018-07-23 15:16:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:42,934 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:16:42,934 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:16:42,934 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=6972, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:16:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:16:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2018-07-23 15:16:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:16:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:16:43,123 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-07-23 15:16:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:43,123 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:16:43,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:16:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:16:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:16:43,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:43,124 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-07-23 15:16:43,124 INFO L414 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-07-23 15:16:43,124 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:44,075 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:44,075 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:16:44,076 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:16:44,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:16:44,076 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:16:44,076 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 86 states. [2018-07-23 15:16:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:45,743 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-23 15:16:45,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:16:45,743 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 165 [2018-07-23 15:16:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:45,744 INFO L225 Difference]: With dead ends: 170 [2018-07-23 15:16:45,744 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:16:45,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:16:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:16:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2018-07-23 15:16:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:16:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:16:45,925 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-07-23 15:16:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:45,926 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:16:45,926 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:16:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:16:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:16:45,927 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:45,927 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-07-23 15:16:45,927 INFO L414 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:45,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-07-23 15:16:45,927 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:47,002 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:47,002 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:16:47,002 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:16:47,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:16:47,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7310, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:16:47,003 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 87 states. [2018-07-23 15:16:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:48,678 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 15:16:48,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:16:48,678 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 167 [2018-07-23 15:16:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:48,679 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:16:48,679 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:16:48,680 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=7310, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:16:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:16:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-07-23 15:16:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:16:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:16:48,881 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-07-23 15:16:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:48,882 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:16:48,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:16:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:16:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:16:48,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:48,883 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-07-23 15:16:48,883 INFO L414 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-07-23 15:16:48,883 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:49,849 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:49,849 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:16:49,850 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:16:49,850 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:16:49,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:16:49,850 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 88 states. [2018-07-23 15:16:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:51,614 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-23 15:16:51,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:16:51,614 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 169 [2018-07-23 15:16:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:51,615 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:16:51,615 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:16:51,615 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:16:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:16:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2018-07-23 15:16:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:16:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:16:51,790 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-07-23 15:16:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:51,791 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:16:51,791 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:16:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:16:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:16:51,791 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:51,791 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-07-23 15:16:51,792 INFO L414 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-07-23 15:16:51,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:52,853 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:52,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:16:52,854 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:16:52,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:16:52,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:16:52,855 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 89 states. [2018-07-23 15:16:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:54,807 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-23 15:16:54,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:16:54,807 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 171 [2018-07-23 15:16:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:54,808 INFO L225 Difference]: With dead ends: 176 [2018-07-23 15:16:54,808 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:16:54,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:16:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:16:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2018-07-23 15:16:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:16:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:16:55,014 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-07-23 15:16:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:55,014 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:16:55,015 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:16:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:16:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:16:55,016 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:55,016 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-07-23 15:16:55,016 INFO L414 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-07-23 15:16:55,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:56,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:56,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:16:56,215 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:16:56,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:16:56,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:16:56,216 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 90 states. [2018-07-23 15:16:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:57,988 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 15:16:57,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:16:57,989 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 173 [2018-07-23 15:16:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:57,989 INFO L225 Difference]: With dead ends: 178 [2018-07-23 15:16:57,990 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:16:57,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:16:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:16:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-07-23 15:16:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:16:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:16:58,185 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-07-23 15:16:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:58,185 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:16:58,185 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:16:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:16:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:16:58,186 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:58,186 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-07-23 15:16:58,186 INFO L414 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:16:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-07-23 15:16:58,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:59,187 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:59,187 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:16:59,187 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:16:59,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:16:59,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:16:59,188 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 91 states. [2018-07-23 15:17:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:01,008 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-23 15:17:01,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:17:01,009 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 175 [2018-07-23 15:17:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:01,009 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:17:01,010 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:17:01,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:17:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:17:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2018-07-23 15:17:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:17:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:17:01,229 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-07-23 15:17:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:01,230 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:17:01,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:17:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:17:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:17:01,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:01,231 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-07-23 15:17:01,231 INFO L414 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-07-23 15:17:01,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:02,333 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:02,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:17:02,334 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:17:02,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:17:02,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:17:02,334 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 92 states. [2018-07-23 15:17:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:04,300 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-23 15:17:04,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:17:04,300 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 177 [2018-07-23 15:17:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:04,301 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:17:04,301 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:17:04,302 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:17:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:17:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2018-07-23 15:17:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:17:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:17:04,524 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-07-23 15:17:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:04,524 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:17:04,524 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:17:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:17:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:17:04,525 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:04,525 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-07-23 15:17:04,525 INFO L414 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-07-23 15:17:04,525 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:05,859 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:05,859 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:17:05,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:17:05,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:17:05,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=8372, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:17:05,860 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 93 states. [2018-07-23 15:17:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:07,757 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 15:17:07,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:17:07,757 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 179 [2018-07-23 15:17:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:07,758 INFO L225 Difference]: With dead ends: 184 [2018-07-23 15:17:07,758 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:17:07,758 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=8372, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:17:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:17:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-07-23 15:17:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:17:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:17:07,966 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-07-23 15:17:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:07,966 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:17:07,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:17:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:17:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:17:07,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:07,967 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-07-23 15:17:07,968 INFO L414 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-07-23 15:17:07,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:09,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:09,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:17:09,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:17:09,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:17:09,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:17:09,100 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 94 states. [2018-07-23 15:17:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:11,245 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-07-23 15:17:11,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:17:11,245 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 181 [2018-07-23 15:17:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:11,246 INFO L225 Difference]: With dead ends: 186 [2018-07-23 15:17:11,246 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:17:11,247 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:17:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:17:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2018-07-23 15:17:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:17:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-23 15:17:11,472 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-07-23 15:17:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:11,472 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-23 15:17:11,472 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:17:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-23 15:17:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:17:11,473 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:11,473 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-07-23 15:17:11,473 INFO L414 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-07-23 15:17:11,473 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:12,731 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:12,731 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:17:12,732 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:17:12,732 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:17:12,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8742, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:17:12,732 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 95 states. [2018-07-23 15:17:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:14,916 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-07-23 15:17:14,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:17:14,916 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 183 [2018-07-23 15:17:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:14,917 INFO L225 Difference]: With dead ends: 188 [2018-07-23 15:17:14,917 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:17:14,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=8742, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:17:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:17:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2018-07-23 15:17:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:17:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-23 15:17:15,132 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-07-23 15:17:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:15,132 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-23 15:17:15,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:17:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-23 15:17:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:17:15,133 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:15,133 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-07-23 15:17:15,133 INFO L414 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-07-23 15:17:15,133 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:16,295 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:16,295 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:17:16,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:17:16,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:17:16,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:17:16,297 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 96 states. [2018-07-23 15:17:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:18,514 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-23 15:17:18,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:17:18,514 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 185 [2018-07-23 15:17:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:18,515 INFO L225 Difference]: With dead ends: 190 [2018-07-23 15:17:18,515 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:17:18,516 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:17:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:17:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-07-23 15:17:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 15:17:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 15:17:18,752 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-07-23 15:17:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:18,752 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 15:17:18,752 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:17:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 15:17:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 15:17:18,753 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:18,753 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-07-23 15:17:18,753 INFO L414 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-07-23 15:17:18,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:20,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:20,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:17:20,069 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:17:20,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:17:20,069 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=9120, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:17:20,069 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 97 states. [2018-07-23 15:17:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:22,278 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-07-23 15:17:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:17:22,278 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 187 [2018-07-23 15:17:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:22,279 INFO L225 Difference]: With dead ends: 192 [2018-07-23 15:17:22,279 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:17:22,280 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=9120, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:17:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:17:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2018-07-23 15:17:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 15:17:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-07-23 15:17:22,520 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-07-23 15:17:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:22,520 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-07-23 15:17:22,520 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:17:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-07-23 15:17:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 15:17:22,521 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:22,521 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-07-23 15:17:22,521 INFO L414 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:22,521 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-07-23 15:17:22,521 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:23,984 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:23,984 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:17:23,984 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:17:23,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:17:23,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:17:23,985 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 98 states. [2018-07-23 15:17:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:26,337 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-07-23 15:17:26,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:17:26,337 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 189 [2018-07-23 15:17:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:26,338 INFO L225 Difference]: With dead ends: 194 [2018-07-23 15:17:26,338 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:17:26,338 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:17:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:17:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2018-07-23 15:17:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 15:17:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-07-23 15:17:26,649 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-07-23 15:17:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:26,649 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-07-23 15:17:26,649 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:17:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-07-23 15:17:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 15:17:26,650 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:26,650 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-07-23 15:17:26,650 INFO L414 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-07-23 15:17:26,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:28,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:28,100 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:17:28,100 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:17:28,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:17:28,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9506, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:17:28,101 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 99 states. [2018-07-23 15:17:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:30,500 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-23 15:17:30,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:17:30,501 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 191 [2018-07-23 15:17:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:30,502 INFO L225 Difference]: With dead ends: 196 [2018-07-23 15:17:30,502 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:17:30,502 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=9506, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:17:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:17:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-07-23 15:17:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 15:17:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 15:17:30,762 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-07-23 15:17:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:30,762 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 15:17:30,762 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:17:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 15:17:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 15:17:30,763 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:30,763 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-07-23 15:17:30,764 INFO L414 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-07-23 15:17:30,764 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:32,199 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:32,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:17:32,200 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:17:32,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:17:32,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:17:32,200 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 100 states. [2018-07-23 15:17:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:34,558 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-07-23 15:17:34,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:17:34,559 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 193 [2018-07-23 15:17:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:34,559 INFO L225 Difference]: With dead ends: 198 [2018-07-23 15:17:34,560 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:17:34,560 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:17:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:17:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2018-07-23 15:17:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:17:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-07-23 15:17:34,815 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-07-23 15:17:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:34,816 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-07-23 15:17:34,816 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:17:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-07-23 15:17:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:17:34,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:34,817 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-07-23 15:17:34,817 INFO L414 AbstractCegarLoop]: === Iteration 97 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-07-23 15:17:34,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:36,367 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:36,367 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:17:36,368 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:17:36,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:17:36,368 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9900, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:17:36,368 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 101 states. [2018-07-23 15:17:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:38,894 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2018-07-23 15:17:38,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:17:38,895 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 195 [2018-07-23 15:17:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:38,895 INFO L225 Difference]: With dead ends: 200 [2018-07-23 15:17:38,896 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:17:38,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=9900, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:17:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:17:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2018-07-23 15:17:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 15:17:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-07-23 15:17:39,157 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-07-23 15:17:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:39,157 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-07-23 15:17:39,157 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:17:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-07-23 15:17:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 15:17:39,158 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:39,158 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-07-23 15:17:39,158 INFO L414 AbstractCegarLoop]: === Iteration 98 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-07-23 15:17:39,158 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:40,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:40,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:17:40,787 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:17:40,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:17:40,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:17:40,788 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 102 states. [2018-07-23 15:17:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:43,270 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-23 15:17:43,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:17:43,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 197 [2018-07-23 15:17:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:43,272 INFO L225 Difference]: With dead ends: 202 [2018-07-23 15:17:43,272 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:17:43,272 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:17:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:17:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-07-23 15:17:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 15:17:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 15:17:43,514 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-07-23 15:17:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:43,515 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 15:17:43,515 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:17:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 15:17:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 15:17:43,515 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:43,516 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-07-23 15:17:43,516 INFO L414 AbstractCegarLoop]: === Iteration 99 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-07-23 15:17:43,516 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:45,204 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:45,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:17:45,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:17:45,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:17:45,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10302, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:17:45,205 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 103 states. [2018-07-23 15:17:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:47,572 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-07-23 15:17:47,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:17:47,572 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 199 [2018-07-23 15:17:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:47,573 INFO L225 Difference]: With dead ends: 204 [2018-07-23 15:17:47,573 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:17:47,574 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=204, Invalid=10302, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:17:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:17:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2018-07-23 15:17:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 15:17:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-07-23 15:17:47,854 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-07-23 15:17:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:47,854 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-07-23 15:17:47,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:17:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-07-23 15:17:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 15:17:47,855 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:47,855 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-07-23 15:17:47,855 INFO L414 AbstractCegarLoop]: === Iteration 100 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-07-23 15:17:47,856 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:49,484 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:49,485 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:17:49,485 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:17:49,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:17:49,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:17:49,486 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 104 states. [2018-07-23 15:17:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:52,237 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-07-23 15:17:52,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:17:52,237 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 201 [2018-07-23 15:17:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:52,238 INFO L225 Difference]: With dead ends: 206 [2018-07-23 15:17:52,238 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:17:52,239 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:17:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:17:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2018-07-23 15:17:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 15:17:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-07-23 15:17:52,492 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-07-23 15:17:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:52,493 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-07-23 15:17:52,493 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:17:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-07-23 15:17:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 15:17:52,494 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:52,494 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-07-23 15:17:52,494 INFO L414 AbstractCegarLoop]: === Iteration 101 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-07-23 15:17:52,495 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:54,169 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:54,169 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:17:54,169 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:17:54,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:17:54,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:17:54,170 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 105 states. [2018-07-23 15:17:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:17:56,765 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-07-23 15:17:56,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:17:56,765 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 203 [2018-07-23 15:17:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:17:56,766 INFO L225 Difference]: With dead ends: 208 [2018-07-23 15:17:56,766 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:17:56,767 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:17:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:17:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-07-23 15:17:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 15:17:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 15:17:57,055 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-07-23 15:17:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:17:57,056 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 15:17:57,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:17:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 15:17:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 15:17:57,056 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:17:57,057 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-07-23 15:17:57,057 INFO L414 AbstractCegarLoop]: === Iteration 102 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:17:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-07-23 15:17:57,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:17:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:17:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:17:58,658 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:17:58,658 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:17:58,659 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:17:58,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:17:58,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:17:58,660 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 106 states. [2018-07-23 15:18:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:01,391 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2018-07-23 15:18:01,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:18:01,391 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 205 [2018-07-23 15:18:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:01,392 INFO L225 Difference]: With dead ends: 210 [2018-07-23 15:18:01,392 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:18:01,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:18:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:18:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2018-07-23 15:18:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:18:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-07-23 15:18:01,701 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-07-23 15:18:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:01,701 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-07-23 15:18:01,701 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:18:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-07-23 15:18:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:18:01,702 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:01,702 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-07-23 15:18:01,702 INFO L414 AbstractCegarLoop]: === Iteration 103 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-07-23 15:18:01,702 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:03,217 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:03,217 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:18:03,218 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:18:03,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:18:03,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=11130, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:18:03,219 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 107 states. [2018-07-23 15:18:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:05,917 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-07-23 15:18:05,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:18:05,917 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 207 [2018-07-23 15:18:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:05,918 INFO L225 Difference]: With dead ends: 212 [2018-07-23 15:18:05,918 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:18:05,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=11130, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:18:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:18:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2018-07-23 15:18:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 15:18:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-07-23 15:18:06,204 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-07-23 15:18:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:06,205 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-07-23 15:18:06,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:18:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-07-23 15:18:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 15:18:06,205 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:06,206 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-07-23 15:18:06,206 INFO L414 AbstractCegarLoop]: === Iteration 104 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-07-23 15:18:06,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:07,735 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:07,735 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:18:07,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:18:07,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:18:07,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:18:07,737 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 108 states. [2018-07-23 15:18:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:10,535 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-07-23 15:18:10,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:18:10,535 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 209 [2018-07-23 15:18:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:10,535 INFO L225 Difference]: With dead ends: 214 [2018-07-23 15:18:10,535 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:18:10,536 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:18:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:18:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-07-23 15:18:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 15:18:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 15:18:10,841 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-07-23 15:18:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:10,842 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 15:18:10,842 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:18:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 15:18:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 15:18:10,843 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:10,843 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-07-23 15:18:10,843 INFO L414 AbstractCegarLoop]: === Iteration 105 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-07-23 15:18:10,843 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:12,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:12,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:18:12,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:18:12,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:18:12,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11556, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:18:12,670 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 109 states. [2018-07-23 15:18:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:15,666 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2018-07-23 15:18:15,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:18:15,666 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 211 [2018-07-23 15:18:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:15,667 INFO L225 Difference]: With dead ends: 216 [2018-07-23 15:18:15,667 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:18:15,668 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=11556, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:18:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:18:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-07-23 15:18:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 15:18:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-07-23 15:18:15,980 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-07-23 15:18:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:15,980 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-07-23 15:18:15,980 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:18:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-07-23 15:18:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 15:18:15,981 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:15,981 INFO L353 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-07-23 15:18:15,981 INFO L414 AbstractCegarLoop]: === Iteration 106 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-07-23 15:18:15,982 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:17,730 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:17,730 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:18:17,731 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:18:17,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:18:17,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:18:17,731 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 110 states. [2018-07-23 15:18:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:20,717 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-07-23 15:18:20,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:18:20,717 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 213 [2018-07-23 15:18:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:20,718 INFO L225 Difference]: With dead ends: 218 [2018-07-23 15:18:20,718 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:18:20,718 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:18:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:18:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2018-07-23 15:18:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 15:18:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-07-23 15:18:21,020 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2018-07-23 15:18:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:21,020 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-07-23 15:18:21,020 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:18:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-07-23 15:18:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 15:18:21,021 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:21,021 INFO L353 BasicCegarLoop]: trace histogram [107, 106, 1, 1] [2018-07-23 15:18:21,021 INFO L414 AbstractCegarLoop]: === Iteration 107 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1514946996, now seen corresponding path program 106 times [2018-07-23 15:18:21,021 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:22,604 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:22,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:18:22,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:18:22,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:18:22,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=11990, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:18:22,606 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 111 states. [2018-07-23 15:18:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:25,542 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-07-23 15:18:25,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:18:25,542 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 215 [2018-07-23 15:18:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:25,543 INFO L225 Difference]: With dead ends: 220 [2018-07-23 15:18:25,543 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:18:25,544 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=11990, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:18:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:18:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-07-23 15:18:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 15:18:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 15:18:25,861 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2018-07-23 15:18:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:25,861 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 15:18:25,861 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:18:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 15:18:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 15:18:25,862 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:25,862 INFO L353 BasicCegarLoop]: trace histogram [108, 107, 1, 1] [2018-07-23 15:18:25,862 INFO L414 AbstractCegarLoop]: === Iteration 108 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -129849098, now seen corresponding path program 107 times [2018-07-23 15:18:25,863 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:27,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:27,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:18:27,920 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:18:27,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:18:27,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:18:27,921 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 112 states. [2018-07-23 15:18:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:31,117 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-07-23 15:18:31,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:18:31,117 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 217 [2018-07-23 15:18:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:31,118 INFO L225 Difference]: With dead ends: 222 [2018-07-23 15:18:31,118 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:18:31,119 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:18:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:18:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2018-07-23 15:18:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:18:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-07-23 15:18:31,475 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2018-07-23 15:18:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:31,476 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-07-23 15:18:31,476 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:18:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-07-23 15:18:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:18:31,476 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:31,477 INFO L353 BasicCegarLoop]: trace histogram [109, 108, 1, 1] [2018-07-23 15:18:31,477 INFO L414 AbstractCegarLoop]: === Iteration 109 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -230930504, now seen corresponding path program 108 times [2018-07-23 15:18:31,477 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:33,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:33,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:18:33,281 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:18:33,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:18:33,282 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=12432, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:18:33,282 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 113 states. [2018-07-23 15:18:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:36,438 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2018-07-23 15:18:36,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:18:36,438 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 219 [2018-07-23 15:18:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:36,439 INFO L225 Difference]: With dead ends: 224 [2018-07-23 15:18:36,439 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:18:36,440 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=12432, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:18:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:18:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2018-07-23 15:18:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 15:18:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-07-23 15:18:36,777 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2018-07-23 15:18:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:36,778 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-07-23 15:18:36,778 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:18:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-07-23 15:18:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 15:18:36,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:36,779 INFO L353 BasicCegarLoop]: trace histogram [110, 109, 1, 1] [2018-07-23 15:18:36,779 INFO L414 AbstractCegarLoop]: === Iteration 110 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1414086138, now seen corresponding path program 109 times [2018-07-23 15:18:36,779 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:38,649 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:38,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:18:38,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:18:38,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:18:38,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:18:38,650 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 114 states. [2018-07-23 15:18:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:41,803 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-07-23 15:18:41,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:18:41,803 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 221 [2018-07-23 15:18:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:41,804 INFO L225 Difference]: With dead ends: 226 [2018-07-23 15:18:41,804 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:18:41,804 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:18:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:18:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-07-23 15:18:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 15:18:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 15:18:42,123 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2018-07-23 15:18:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:42,124 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 15:18:42,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:18:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 15:18:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 15:18:42,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:42,124 INFO L353 BasicCegarLoop]: trace histogram [111, 110, 1, 1] [2018-07-23 15:18:42,125 INFO L414 AbstractCegarLoop]: === Iteration 111 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1727114172, now seen corresponding path program 110 times [2018-07-23 15:18:42,125 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:43,864 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:43,864 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:18:43,864 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:18:43,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:18:43,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=12882, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:18:43,865 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 115 states. [2018-07-23 15:18:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:46,911 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-07-23 15:18:46,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:18:46,912 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 223 [2018-07-23 15:18:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:46,912 INFO L225 Difference]: With dead ends: 228 [2018-07-23 15:18:46,912 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:18:46,913 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=12882, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:18:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:18:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2018-07-23 15:18:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 15:18:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-07-23 15:18:47,221 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2018-07-23 15:18:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:47,221 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-07-23 15:18:47,221 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:18:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-07-23 15:18:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 15:18:47,222 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:47,222 INFO L353 BasicCegarLoop]: trace histogram [112, 111, 1, 1] [2018-07-23 15:18:47,222 INFO L414 AbstractCegarLoop]: === Iteration 112 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1899344126, now seen corresponding path program 111 times [2018-07-23 15:18:47,223 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:48,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:48,974 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:18:48,974 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:18:48,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:18:48,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:18:48,975 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 116 states. [2018-07-23 15:18:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:52,259 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-07-23 15:18:52,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:18:52,260 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 225 [2018-07-23 15:18:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:52,260 INFO L225 Difference]: With dead ends: 230 [2018-07-23 15:18:52,260 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:18:52,261 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:18:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:18:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2018-07-23 15:18:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 15:18:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-07-23 15:18:52,616 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2018-07-23 15:18:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:52,616 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-07-23 15:18:52,616 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:18:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-07-23 15:18:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 15:18:52,617 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:52,617 INFO L353 BasicCegarLoop]: trace histogram [113, 112, 1, 1] [2018-07-23 15:18:52,617 INFO L414 AbstractCegarLoop]: === Iteration 113 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash -91394624, now seen corresponding path program 112 times [2018-07-23 15:18:52,617 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:18:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:18:54,588 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:18:54,588 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:18:54,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:18:54,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:18:54,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=13340, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:18:54,589 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 117 states. [2018-07-23 15:18:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:18:57,920 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-07-23 15:18:57,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:18:57,920 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 227 [2018-07-23 15:18:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:18:57,921 INFO L225 Difference]: With dead ends: 232 [2018-07-23 15:18:57,921 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:18:57,921 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=232, Invalid=13340, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:18:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:18:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-07-23 15:18:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 15:18:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 15:18:58,268 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2018-07-23 15:18:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:18:58,268 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 15:18:58,269 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:18:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 15:18:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 15:18:58,269 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:18:58,269 INFO L353 BasicCegarLoop]: trace histogram [114, 113, 1, 1] [2018-07-23 15:18:58,269 INFO L414 AbstractCegarLoop]: === Iteration 114 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:18:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1930886654, now seen corresponding path program 113 times [2018-07-23 15:18:58,270 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:18:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:00,357 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:00,357 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:19:00,357 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:19:00,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:19:00,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=13572, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:19:00,358 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 118 states. Received shutdown request... [2018-07-23 15:19:01,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:19:01,418 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:19:01,424 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:19:01,424 INFO L202 PluginConnector]: Adding new model divisibilityWithArray.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:19:01 BoogieIcfgContainer [2018-07-23 15:19:01,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:19:01,425 INFO L168 Benchmark]: Toolchain (without parser) took 245187.90 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -19.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-07-23 15:19:01,426 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:19:01,426 INFO L168 Benchmark]: Boogie Preprocessor took 51.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:19:01,427 INFO L168 Benchmark]: RCFGBuilder took 225.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:19:01,427 INFO L168 Benchmark]: TraceAbstraction took 244906.14 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -30.0 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-07-23 15:19:01,429 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 225.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244906.14 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -30.0 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (230states) and interpolant automaton (currently 35 states, 118 states before enhancement), while ReachableStatesComputation was computing reachable states (64 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 244.8s OverallTime, 114 OverallIterations, 114 TraceHistogramMax, 138.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 227 SDtfs, 227 SDslu, 0 SDs, 0 SdLazy, 1014944 SolverSat, 0 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 96.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6782 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6782 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 73.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=113, 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: 15.3s AutomataMinimizationTime, 113 MinimizatonAttempts, 113 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 78.9s InterpolantComputationTime, 13224 NumberOfCodeBlocks, 13224 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 13110 ConstructedInterpolants, 0 QuantifiedInterpolants, 44740284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 114 InterpolantComputations, 1 PerfectInterpolantSequences, 0/493810 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/divisibilityWithArray.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-19-01-439.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/divisibilityWithArray.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-19-01-439.csv Completed graceful shutdown