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/toy/tooDifficultLoopInvariant/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:33:13,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:33:13,084 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:33:13,096 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:33:13,096 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:33:13,097 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:33:13,099 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:33:13,100 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:33:13,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:33:13,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:33:13,104 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:33:13,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:33:13,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:33:13,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:33:13,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:33:13,108 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:33:13,109 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:33:13,111 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:33:13,113 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:33:13,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:33:13,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:33:13,117 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:33:13,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:33:13,120 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:33:13,120 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:33:13,121 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:33:13,122 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:33:13,123 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:33:13,123 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:33:13,124 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:33:13,125 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:33:13,125 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:33:13,129 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 15:33:13,154 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:33:13,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:33:13,159 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:33:13,159 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:33:13,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:33:13,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:33:13,160 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:33:13,160 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:33:13,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:33:13,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:33:13,255 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:33:13,257 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:33:13,257 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:33:13,258 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-07-23 15:33:13,259 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-07-23 15:33:13,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:33:13,314 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:33:13,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:33:13,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:33:13,315 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:33:13,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:33:13,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:33:13,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:33:13,363 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:33:13,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/1) ... [2018-07-23 15:33:13,450 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-23 15:33:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 15:33:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 15:33:13,566 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:33:13,567 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:33:13 BoogieIcfgContainer [2018-07-23 15:33:13,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:33:13,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:33:13,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:33:13,572 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:33:13,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:33:13" (1/2) ... [2018-07-23 15:33:13,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c7ebb2 and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:33:13, skipping insertion in model container [2018-07-23 15:33:13,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:33:13" (2/2) ... [2018-07-23 15:33:13,576 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-07-23 15:33:13,587 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:33:13,596 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:33:13,645 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:33:13,646 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:33:13,647 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:33:13,647 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:33:13,647 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:33:13,647 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:33:13,648 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:33:13,648 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:33:13,648 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:33:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:33:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:33:13,674 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:13,675 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:33:13,676 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-07-23 15:33:13,688 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:13,760 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 15:33:13,763 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:33:13,764 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:33:13,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:33:13,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:33:13,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:33:13,790 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-23 15:33:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:13,818 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-07-23 15:33:13,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:33:13,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:33:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:13,831 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:33:13,832 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 15:33:13,835 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:33:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 15:33:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 15:33:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:33:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:33:13,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 15:33:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:13,876 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:33:13,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:33:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:33:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:33:13,877 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:13,877 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:33:13,878 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-07-23 15:33:13,878 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:13,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:13,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:33:13,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:33:13,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:33:13,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:33:13,901 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 15:33:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:13,915 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 15:33:13,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:33:13,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:33:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:13,917 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:33:13,917 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:33:13,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:33:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:33:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:33:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:33:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:33:13,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 15:33:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:13,922 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:33:13,923 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:33:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:33:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:33:13,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:13,926 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:33:13,927 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-07-23 15:33:13,927 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:13,978 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:13,978 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:33:13,979 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:33:13,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:33:13,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:33:13,983 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-23 15:33:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,001 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:33:14,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:33:14,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-23 15:33:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,002 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:33:14,002 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:33:14,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:33:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:33:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:33:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:33:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:33:14,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 15:33:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,006 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:33:14,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:33:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:33:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:33:14,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,007 INFO L353 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-23 15:33:14,007 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-07-23 15:33:14,008 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,039 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 15:33:14,039 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,039 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:33:14,040 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:33:14,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:33:14,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:33:14,041 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 15:33:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,065 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:33:14,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:33:14,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 15:33:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,066 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:33:14,066 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:33:14,067 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:33:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:33:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:33:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:33:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:33:14,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 15:33:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,071 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:33:14,071 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:33:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:33:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:33:14,071 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,072 INFO L353 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-07-23 15:33:14,072 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-07-23 15:33:14,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,141 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,141 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:33:14,141 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:33:14,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:33:14,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:33:14,142 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-23 15:33:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,159 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:33:14,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:33:14,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-23 15:33:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,160 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:33:14,161 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:33:14,161 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:33:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:33:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:33:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:33:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:33:14,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-23 15:33:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,165 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:33:14,165 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:33:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:33:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:33:14,166 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,166 INFO L353 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-07-23 15:33:14,166 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-07-23 15:33:14,167 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,223 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,223 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:33:14,223 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:33:14,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:33:14,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:33:14,227 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-07-23 15:33:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,247 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:33:14,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:33:14,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-07-23 15:33:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,248 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:33:14,248 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:33:14,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:33:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:33:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:33:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:33:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:33:14,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-23 15:33:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,253 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:33:14,253 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:33:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:33:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:33:14,253 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,254 INFO L353 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-07-23 15:33:14,254 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-07-23 15:33:14,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,323 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:33:14,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:33:14,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:33:14,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:33:14,325 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-07-23 15:33:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,339 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:33:14,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:33:14,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-07-23 15:33:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,340 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:33:14,341 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:33:14,341 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:33:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:33:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:33:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:33:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:33:14,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-23 15:33:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,345 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:33:14,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:33:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:33:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:33:14,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,347 INFO L353 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-07-23 15:33:14,347 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-07-23 15:33:14,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:33:14,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:33:14,424 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:33:14,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:33:14,424 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-07-23 15:33:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,440 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:33:14,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:33:14,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-07-23 15:33:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,442 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:33:14,442 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:33:14,443 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:33:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:33:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 15:33:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:33:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:33:14,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-23 15:33:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,447 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:33:14,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:33:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:33:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:33:14,448 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,449 INFO L353 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-07-23 15:33:14,449 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-07-23 15:33:14,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:33:14,499 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:33:14,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:33:14,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:33:14,500 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-07-23 15:33:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,528 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:33:14,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:33:14,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-07-23 15:33:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,530 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:33:14,531 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:33:14,532 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:33:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:33:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:33:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:33:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:33:14,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-07-23 15:33:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,543 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:33:14,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:33:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:33:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:33:14,544 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,544 INFO L353 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-07-23 15:33:14,545 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-07-23 15:33:14,545 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,590 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:33:14,590 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:33:14,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:33:14,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:33:14,592 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-07-23 15:33:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,605 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:33:14,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:33:14,606 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-07-23 15:33:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,607 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:33:14,607 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:33:14,608 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:33:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:33:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:33:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:33:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:33:14,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-07-23 15:33:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,612 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:33:14,612 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:33:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:33:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:33:14,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,614 INFO L353 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-07-23 15:33:14,614 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-07-23 15:33:14,614 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,667 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:33:14,667 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:33:14,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:33:14,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:33:14,668 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-07-23 15:33:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,681 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:33:14,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:33:14,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-07-23 15:33:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,682 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:33:14,682 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:33:14,683 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:33:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:33:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:33:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:33:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:33:14,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-07-23 15:33:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,688 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:33:14,688 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:33:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:33:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:33:14,689 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,689 INFO L353 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-07-23 15:33:14,689 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,690 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-07-23 15:33:14,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,756 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:33:14,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:33:14,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:33:14,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:33:14,758 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-07-23 15:33:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,773 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:33:14,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:33:14,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-07-23 15:33:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,774 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:33:14,775 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:33:14,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:33:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:33:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:33:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:33:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:33:14,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-07-23 15:33:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,782 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:33:14,782 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:33:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:33:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:33:14,783 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,783 INFO L353 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-07-23 15:33:14,785 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-07-23 15:33:14,785 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:14,865 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:14,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:33:14,865 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:33:14,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:33:14,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:33:14,867 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-07-23 15:33:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:14,882 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:33:14,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:33:14,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-07-23 15:33:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:14,884 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:33:14,884 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:33:14,884 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:33:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:33:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:33:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:33:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:33:14,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-07-23 15:33:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:14,895 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:33:14,895 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:33:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:33:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:33:14,896 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:14,896 INFO L353 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-07-23 15:33:14,896 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-07-23 15:33:14,896 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,003 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,004 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:33:15,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:33:15,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:33:15,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:33:15,008 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-07-23 15:33:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,029 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:33:15,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:33:15,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-07-23 15:33:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,030 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:33:15,030 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 15:33:15,031 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:33:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 15:33:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 15:33:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:33:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:33:15,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-07-23 15:33:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,036 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:33:15,036 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:33:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:33:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:33:15,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,037 INFO L353 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-07-23 15:33:15,037 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-07-23 15:33:15,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,097 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,097 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:33:15,098 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:33:15,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:33:15,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:33:15,099 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-07-23 15:33:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,112 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:33:15,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:33:15,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-07-23 15:33:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,113 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:33:15,114 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:33:15,114 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:33:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:33:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:33:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:33:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:33:15,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-07-23 15:33:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,123 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:33:15,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:33:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:33:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:33:15,126 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,126 INFO L353 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-07-23 15:33:15,126 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-07-23 15:33:15,127 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,192 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,192 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:33:15,192 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:33:15,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:33:15,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:33:15,194 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-07-23 15:33:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,206 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:33:15,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:33:15,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-07-23 15:33:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,209 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:33:15,209 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 15:33:15,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:33:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 15:33:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 15:33:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:33:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:33:15,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-07-23 15:33:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,215 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:33:15,215 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:33:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:33:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:33:15,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,216 INFO L353 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-07-23 15:33:15,216 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-07-23 15:33:15,217 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,270 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:33:15,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:33:15,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:33:15,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:33:15,273 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-07-23 15:33:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,290 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:33:15,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:33:15,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-07-23 15:33:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,297 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:33:15,299 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:33:15,300 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:33:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:33:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:33:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:33:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:33:15,311 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-07-23 15:33:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,312 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:33:15,312 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:33:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:33:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:33:15,313 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,313 INFO L353 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-07-23 15:33:15,313 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-07-23 15:33:15,314 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:33:15,374 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:33:15,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:33:15,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:33:15,375 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-07-23 15:33:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,391 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:33:15,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:33:15,394 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-07-23 15:33:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,395 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:33:15,395 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:33:15,396 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:33:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:33:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:33:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:33:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:33:15,404 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-07-23 15:33:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,407 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:33:15,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:33:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:33:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:33:15,408 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,408 INFO L353 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-07-23 15:33:15,408 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,408 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-07-23 15:33:15,409 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,491 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,491 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:33:15,492 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:33:15,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:33:15,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:33:15,493 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-07-23 15:33:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,511 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:33:15,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:33:15,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-07-23 15:33:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,512 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:33:15,513 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:33:15,513 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:33:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:33:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:33:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:33:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:33:15,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-07-23 15:33:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,518 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:33:15,518 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:33:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:33:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:33:15,519 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,519 INFO L353 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-07-23 15:33:15,519 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-07-23 15:33:15,520 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:33:15,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:33:15,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:33:15,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:33:15,588 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-07-23 15:33:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,602 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:33:15,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:33:15,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-07-23 15:33:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,604 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:33:15,604 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 15:33:15,605 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:33:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 15:33:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 15:33:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:33:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:33:15,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-07-23 15:33:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,610 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:33:15,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:33:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:33:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:33:15,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,612 INFO L353 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-07-23 15:33:15,612 INFO L414 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-07-23 15:33:15,613 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,689 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 15:33:15,689 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,690 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:33:15,690 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:33:15,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:33:15,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:33:15,692 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-07-23 15:33:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,713 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:33:15,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:33:15,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-07-23 15:33:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,714 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:33:15,714 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:33:15,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:33:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:33:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:33:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:33:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:33:15,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-07-23 15:33:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,722 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:33:15,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:33:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:33:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:33:15,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,723 INFO L353 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-07-23 15:33:15,723 INFO L414 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-07-23 15:33:15,724 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,804 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,804 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:33:15,805 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:33:15,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:33:15,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:33:15,806 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-07-23 15:33:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,826 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 15:33:15,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:33:15,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-07-23 15:33:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,827 INFO L225 Difference]: With dead ends: 28 [2018-07-23 15:33:15,827 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 15:33:15,831 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:33:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 15:33:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-23 15:33:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:33:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:33:15,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-07-23 15:33:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,843 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:33:15,843 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:33:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:33:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:33:15,844 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,844 INFO L353 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-07-23 15:33:15,844 INFO L414 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,848 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-07-23 15:33:15,848 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:15,950 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:15,950 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:33:15,951 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:33:15,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:33:15,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:33:15,952 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-07-23 15:33:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:15,974 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:33:15,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:33:15,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-07-23 15:33:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:15,975 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:33:15,975 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:33:15,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:33:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:33:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:33:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:33:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:33:15,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-07-23 15:33:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:15,983 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:33:15,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:33:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:33:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:33:15,984 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:15,984 INFO L353 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-07-23 15:33:15,984 INFO L414 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-07-23 15:33:15,986 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,074 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,074 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:33:16,075 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:33:16,075 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:33:16,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:33:16,079 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-07-23 15:33:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,095 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-23 15:33:16,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:33:16,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-07-23 15:33:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,096 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:33:16,096 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:33:16,097 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:33:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:33:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:33:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:33:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:33:16,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-07-23 15:33:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,106 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:33:16,106 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:33:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:33:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:33:16,107 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,107 INFO L353 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-07-23 15:33:16,107 INFO L414 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-07-23 15:33:16,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,204 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:33:16,205 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:33:16,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:33:16,206 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:33:16,206 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-07-23 15:33:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,223 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:33:16,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:33:16,223 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-07-23 15:33:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,224 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:33:16,224 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:33:16,225 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:33:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:33:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:33:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:33:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:33:16,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-07-23 15:33:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,229 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:33:16,229 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:33:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:33:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:33:16,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,230 INFO L353 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-07-23 15:33:16,231 INFO L414 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-07-23 15:33:16,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,331 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:33:16,332 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:33:16,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:33:16,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:33:16,336 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-07-23 15:33:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,353 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-23 15:33:16,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:33:16,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-07-23 15:33:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,354 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:33:16,354 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 15:33:16,355 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:33:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 15:33:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 15:33:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:33:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:33:16,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-07-23 15:33:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,361 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:33:16,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:33:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:33:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:33:16,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,362 INFO L353 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-07-23 15:33:16,364 INFO L414 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-07-23 15:33:16,365 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,490 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,490 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:33:16,491 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:33:16,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:33:16,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:33:16,492 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-07-23 15:33:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,510 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:33:16,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:33:16,511 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-07-23 15:33:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,511 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:33:16,512 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:33:16,513 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:33:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:33:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:33:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:33:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:33:16,521 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-07-23 15:33:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,523 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:33:16,524 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:33:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:33:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:33:16,525 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,526 INFO L353 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-07-23 15:33:16,526 INFO L414 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-07-23 15:33:16,527 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,671 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,671 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:33:16,672 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:33:16,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:33:16,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:33:16,673 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-07-23 15:33:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,697 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 15:33:16,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:33:16,697 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-07-23 15:33:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,698 INFO L225 Difference]: With dead ends: 34 [2018-07-23 15:33:16,698 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:33:16,699 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:33:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:33:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:33:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:33:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:33:16,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-07-23 15:33:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,712 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:33:16,712 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:33:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:33:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:33:16,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,713 INFO L353 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-07-23 15:33:16,713 INFO L414 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-07-23 15:33:16,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,838 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:33:16,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:33:16,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:33:16,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:33:16,840 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-07-23 15:33:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:16,854 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:33:16,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:33:16,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-07-23 15:33:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:16,855 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:33:16,855 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:33:16,856 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:33:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:33:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:33:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:33:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:33:16,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-07-23 15:33:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:16,861 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:33:16,861 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:33:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:33:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:33:16,861 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:16,862 INFO L353 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-07-23 15:33:16,862 INFO L414 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-07-23 15:33:16,862 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:16,993 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:16,993 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:33:16,994 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:33:16,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:33:16,995 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:33:16,995 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-07-23 15:33:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,011 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-23 15:33:17,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:33:17,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-07-23 15:33:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,012 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:33:17,013 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:33:17,014 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:33:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:33:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:33:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:33:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:33:17,017 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-07-23 15:33:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,017 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:33:17,017 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:33:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:33:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:33:17,018 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,018 INFO L353 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-07-23 15:33:17,018 INFO L414 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-07-23 15:33:17,019 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,148 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,148 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:33:17,149 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:33:17,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:33:17,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:33:17,150 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-07-23 15:33:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,167 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:33:17,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:33:17,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-07-23 15:33:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,168 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:33:17,169 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:33:17,170 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:33:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:33:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:33:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:33:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:33:17,173 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-07-23 15:33:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,173 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:33:17,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:33:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:33:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:33:17,174 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,174 INFO L353 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-07-23 15:33:17,174 INFO L414 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-07-23 15:33:17,175 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:33:17,309 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:33:17,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:33:17,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:33:17,311 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-07-23 15:33:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,327 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-23 15:33:17,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:33:17,327 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-07-23 15:33:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,328 INFO L225 Difference]: With dead ends: 38 [2018-07-23 15:33:17,328 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:33:17,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:33:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:33:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:33:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:33:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:33:17,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-07-23 15:33:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,336 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:33:17,336 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:33:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:33:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:33:17,337 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,337 INFO L353 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-07-23 15:33:17,337 INFO L414 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-07-23 15:33:17,338 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:33:17,536 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:33:17,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:33:17,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:33:17,540 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-07-23 15:33:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,555 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:33:17,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:33:17,555 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-07-23 15:33:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,556 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:33:17,556 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:33:17,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:33:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:33:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:33:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:33:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:33:17,564 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-07-23 15:33:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,564 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:33:17,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:33:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:33:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:33:17,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,566 INFO L353 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-07-23 15:33:17,566 INFO L414 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-07-23 15:33:17,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,703 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,703 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:33:17,703 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:33:17,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:33:17,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:33:17,704 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-07-23 15:33:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,720 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 15:33:17,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:33:17,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-07-23 15:33:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,721 INFO L225 Difference]: With dead ends: 40 [2018-07-23 15:33:17,721 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 15:33:17,722 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:33:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 15:33:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-23 15:33:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:33:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:33:17,726 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-07-23 15:33:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,726 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:33:17,726 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:33:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:33:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:33:17,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,727 INFO L353 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-07-23 15:33:17,727 INFO L414 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-07-23 15:33:17,728 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,870 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:33:17,872 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:33:17,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:33:17,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:33:17,873 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-07-23 15:33:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,889 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:33:17,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:33:17,890 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-07-23 15:33:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,890 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:33:17,890 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:33:17,891 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:33:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:33:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:33:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:33:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:33:17,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-07-23 15:33:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,901 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:33:17,902 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:33:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:33:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:33:17,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,902 INFO L353 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-07-23 15:33:17,903 INFO L414 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-07-23 15:33:17,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,055 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,055 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:33:18,056 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:33:18,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:33:18,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:33:18,058 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-07-23 15:33:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,075 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-23 15:33:18,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:33:18,075 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-07-23 15:33:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,076 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:33:18,076 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:33:18,077 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:33:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:33:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:33:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:33:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:33:18,080 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-07-23 15:33:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,080 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:33:18,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:33:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:33:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:33:18,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,082 INFO L353 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-07-23 15:33:18,083 INFO L414 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-07-23 15:33:18,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,224 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,224 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:33:18,224 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:33:18,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:33:18,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:33:18,226 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-07-23 15:33:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,244 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:33:18,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:33:18,244 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-07-23 15:33:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,245 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:33:18,245 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:33:18,246 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:33:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:33:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:33:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:33:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:33:18,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-07-23 15:33:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,249 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:33:18,249 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:33:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:33:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:33:18,250 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,250 INFO L353 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-07-23 15:33:18,250 INFO L414 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-07-23 15:33:18,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,389 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:33:18,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:33:18,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:33:18,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:33:18,391 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-07-23 15:33:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,411 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-23 15:33:18,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:33:18,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-07-23 15:33:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,412 INFO L225 Difference]: With dead ends: 44 [2018-07-23 15:33:18,412 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 15:33:18,413 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:33:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 15:33:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 15:33:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:33:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:33:18,417 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-07-23 15:33:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,417 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:33:18,418 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:33:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:33:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:33:18,418 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,418 INFO L353 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-07-23 15:33:18,418 INFO L414 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-07-23 15:33:18,419 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:33:18,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:33:18,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:33:18,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:33:18,570 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-07-23 15:33:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,590 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:33:18,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:33:18,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-07-23 15:33:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,591 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:33:18,592 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:33:18,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:33:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:33:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:33:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:33:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:33:18,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-07-23 15:33:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,596 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:33:18,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:33:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:33:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:33:18,602 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,602 INFO L353 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-07-23 15:33:18,602 INFO L414 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-07-23 15:33:18,603 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,747 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:33:18,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:33:18,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:33:18,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:33:18,749 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-07-23 15:33:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,767 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 15:33:18,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:33:18,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-07-23 15:33:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,768 INFO L225 Difference]: With dead ends: 46 [2018-07-23 15:33:18,768 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 15:33:18,770 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:33:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 15:33:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 15:33:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:33:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:33:18,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-07-23 15:33:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,772 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:33:18,773 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:33:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:33:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:33:18,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,773 INFO L353 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-07-23 15:33:18,773 INFO L414 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-07-23 15:33:18,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:18,924 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:18,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:33:18,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:33:18,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:33:18,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:33:18,926 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-07-23 15:33:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:18,949 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:33:18,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:33:18,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-07-23 15:33:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:18,950 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:33:18,950 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:33:18,951 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:33:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:33:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:33:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:33:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:33:18,954 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-07-23 15:33:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:18,954 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:33:18,954 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:33:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:33:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:33:18,954 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:18,955 INFO L353 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-07-23 15:33:18,955 INFO L414 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-07-23 15:33:18,955 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,108 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,108 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:33:19,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:33:19,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:33:19,110 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:33:19,110 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-07-23 15:33:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:19,128 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-23 15:33:19,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:33:19,129 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-07-23 15:33:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:19,130 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:33:19,130 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:33:19,131 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:33:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:33:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:33:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:33:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:33:19,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-07-23 15:33:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:19,134 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:33:19,134 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:33:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:33:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:33:19,135 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:19,135 INFO L353 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-07-23 15:33:19,135 INFO L414 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-07-23 15:33:19,136 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,294 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,295 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:33:19,295 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:33:19,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:33:19,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:33:19,297 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-07-23 15:33:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:19,317 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:33:19,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:33:19,317 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-07-23 15:33:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:19,317 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:33:19,318 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:33:19,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:33:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:33:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:33:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:33:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:33:19,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-07-23 15:33:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:19,324 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:33:19,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:33:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:33:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:33:19,325 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:19,325 INFO L353 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-07-23 15:33:19,328 INFO L414 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-07-23 15:33:19,329 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:33:19,496 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:33:19,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:33:19,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:33:19,499 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-07-23 15:33:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:19,527 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-23 15:33:19,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:33:19,527 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-07-23 15:33:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:19,528 INFO L225 Difference]: With dead ends: 50 [2018-07-23 15:33:19,528 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 15:33:19,529 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:33:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 15:33:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 15:33:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:33:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:33:19,533 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-07-23 15:33:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:19,533 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:33:19,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:33:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:33:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:33:19,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:19,534 INFO L353 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-07-23 15:33:19,534 INFO L414 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-07-23 15:33:19,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,741 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:33:19,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:33:19,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:33:19,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:33:19,743 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-07-23 15:33:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:19,771 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:33:19,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:33:19,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-07-23 15:33:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:19,773 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:33:19,773 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:33:19,774 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:33:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:33:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:33:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:33:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:33:19,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-07-23 15:33:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:19,778 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:33:19,778 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:33:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:33:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:33:19,779 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:19,779 INFO L353 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-07-23 15:33:19,779 INFO L414 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:19,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-07-23 15:33:19,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:19,989 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:19,989 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:33:19,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:33:19,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:33:19,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:33:19,991 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-07-23 15:33:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,013 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 15:33:20,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:33:20,014 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-07-23 15:33:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,014 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:33:20,015 INFO L226 Difference]: Without dead ends: 50 [2018-07-23 15:33:20,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:33:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-23 15:33:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-23 15:33:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:33:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:33:20,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-07-23 15:33:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,019 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:33:20,019 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:33:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:33:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:33:20,019 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,020 INFO L353 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-07-23 15:33:20,020 INFO L414 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-07-23 15:33:20,020 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:20,213 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:20,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:33:20,214 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:33:20,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:33:20,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:33:20,215 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-07-23 15:33:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,235 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:33:20,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:33:20,235 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-07-23 15:33:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,236 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:33:20,236 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:33:20,237 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:33:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:33:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:33:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:33:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:33:20,241 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-07-23 15:33:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,241 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:33:20,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:33:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:33:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:33:20,242 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,242 INFO L353 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-07-23 15:33:20,242 INFO L414 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-07-23 15:33:20,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:20,398 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:20,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:33:20,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:33:20,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:33:20,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:33:20,400 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-07-23 15:33:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,421 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-23 15:33:20,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:33:20,421 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-07-23 15:33:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,422 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:33:20,422 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:33:20,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:33:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:33:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:33:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:33:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:33:20,428 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-07-23 15:33:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,428 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:33:20,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:33:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:33:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:33:20,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,430 INFO L353 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-07-23 15:33:20,431 INFO L414 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-07-23 15:33:20,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:20,584 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:20,584 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:33:20,585 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:33:20,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:33:20,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:33:20,586 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-07-23 15:33:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,608 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:33:20,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:33:20,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-07-23 15:33:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,609 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:33:20,610 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:33:20,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:33:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:33:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:33:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:33:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:33:20,614 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-07-23 15:33:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,614 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:33:20,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:33:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:33:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:33:20,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,615 INFO L353 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-07-23 15:33:20,616 INFO L414 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-07-23 15:33:20,616 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:20,805 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:20,805 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:33:20,805 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:33:20,806 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:33:20,807 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:33:20,807 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-07-23 15:33:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:20,836 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-23 15:33:20,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:33:20,836 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-07-23 15:33:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:20,837 INFO L225 Difference]: With dead ends: 56 [2018-07-23 15:33:20,837 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 15:33:20,838 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:33:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 15:33:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 15:33:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:33:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:33:20,841 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-07-23 15:33:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:20,841 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:33:20,842 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:33:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:33:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:33:20,842 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:20,842 INFO L353 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-07-23 15:33:20,843 INFO L414 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:20,843 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-07-23 15:33:20,843 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:21,041 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:21,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:33:21,042 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:33:21,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:33:21,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:33:21,044 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-07-23 15:33:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,081 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:33:21,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:33:21,081 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-07-23 15:33:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,082 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:33:21,082 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:33:21,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:33:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:33:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:33:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:33:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:33:21,094 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-07-23 15:33:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,095 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:33:21,095 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:33:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:33:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:33:21,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,096 INFO L353 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-07-23 15:33:21,096 INFO L414 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-07-23 15:33:21,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:21,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:21,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:33:21,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:33:21,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:33:21,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:33:21,307 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-07-23 15:33:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,336 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 15:33:21,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:33:21,336 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-07-23 15:33:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,337 INFO L225 Difference]: With dead ends: 58 [2018-07-23 15:33:21,337 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 15:33:21,338 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:33:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 15:33:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 15:33:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:33:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:33:21,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-07-23 15:33:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,342 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:33:21,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:33:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:33:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:33:21,343 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,343 INFO L353 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-07-23 15:33:21,343 INFO L414 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-07-23 15:33:21,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:21,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:21,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:33:21,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:33:21,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:33:21,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:33:21,568 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-07-23 15:33:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,599 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:33:21,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:33:21,599 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-07-23 15:33:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,600 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:33:21,600 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:33:21,601 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:33:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:33:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:33:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:33:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:33:21,604 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-07-23 15:33:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,604 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:33:21,604 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:33:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:33:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:33:21,605 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,605 INFO L353 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-07-23 15:33:21,605 INFO L414 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-07-23 15:33:21,606 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:21,830 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:21,830 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:33:21,830 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:33:21,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:33:21,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:33:21,832 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-07-23 15:33:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,862 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-23 15:33:21,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:33:21,862 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-07-23 15:33:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,863 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:33:21,863 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:33:21,864 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:33:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:33:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:33:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:33:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:33:21,867 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-07-23 15:33:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,867 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:33:21,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:33:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:33:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:33:21,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,868 INFO L353 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-07-23 15:33:21,869 INFO L414 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-07-23 15:33:21,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:22,083 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:22,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:33:22,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:33:22,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:33:22,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:33:22,085 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-07-23 15:33:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:22,120 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:33:22,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:33:22,121 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-07-23 15:33:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:22,122 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:33:22,122 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:33:22,123 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:33:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:33:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:33:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:33:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:33:22,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-07-23 15:33:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:22,126 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:33:22,126 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:33:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:33:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:33:22,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:22,130 INFO L353 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-07-23 15:33:22,130 INFO L414 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-07-23 15:33:22,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:22,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:22,390 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:33:22,390 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:33:22,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:33:22,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:33:22,392 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-07-23 15:33:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:22,424 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-23 15:33:22,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:33:22,425 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-07-23 15:33:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:22,426 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:33:22,426 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 15:33:22,427 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:33:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 15:33:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 15:33:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:33:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:33:22,432 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-07-23 15:33:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:22,432 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:33:22,433 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:33:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:33:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:33:22,434 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:22,434 INFO L353 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-07-23 15:33:22,434 INFO L414 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-07-23 15:33:22,435 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:22,712 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:22,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:33:22,713 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:33:22,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:33:22,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:33:22,715 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-07-23 15:33:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:22,762 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:33:22,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:33:22,762 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-07-23 15:33:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:22,763 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:33:22,763 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:33:22,764 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:33:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:33:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:33:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:33:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:33:22,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-07-23 15:33:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:22,788 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:33:22,789 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:33:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:33:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:33:22,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:22,792 INFO L353 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-07-23 15:33:22,793 INFO L414 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-07-23 15:33:22,794 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:23,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:23,006 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:33:23,007 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:33:23,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:33:23,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:33:23,008 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-07-23 15:33:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:23,047 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 15:33:23,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:33:23,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-07-23 15:33:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:23,048 INFO L225 Difference]: With dead ends: 64 [2018-07-23 15:33:23,048 INFO L226 Difference]: Without dead ends: 62 [2018-07-23 15:33:23,049 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:33:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-23 15:33:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-23 15:33:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:33:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:33:23,052 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-07-23 15:33:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:23,052 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:33:23,052 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:33:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:33:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:33:23,053 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:23,053 INFO L353 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-07-23 15:33:23,053 INFO L414 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-07-23 15:33:23,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:23,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:23,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:33:23,281 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:33:23,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:33:23,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:33:23,283 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-07-23 15:33:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:23,325 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:33:23,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:33:23,326 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-07-23 15:33:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:23,326 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:33:23,326 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:33:23,328 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:33:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:33:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:33:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:33:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:33:23,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-07-23 15:33:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:23,331 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:33:23,331 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:33:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:33:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:33:23,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:23,332 INFO L353 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-07-23 15:33:23,332 INFO L414 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-07-23 15:33:23,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:23,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:23,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:33:23,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:33:23,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:33:23,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:33:23,568 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-07-23 15:33:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:23,612 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-23 15:33:23,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:33:23,612 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-07-23 15:33:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:23,613 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:33:23,613 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:33:23,615 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:33:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:33:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:33:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:33:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:33:23,617 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-07-23 15:33:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:23,618 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:33:23,618 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:33:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:33:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:33:23,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:23,618 INFO L353 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-07-23 15:33:23,619 INFO L414 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-07-23 15:33:23,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:23,853 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:23,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:33:23,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:33:23,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:33:23,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:33:23,855 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-07-23 15:33:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:23,894 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:33:23,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:33:23,894 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-07-23 15:33:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:23,895 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:33:23,895 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:33:23,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:33:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:33:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:33:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:33:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:33:23,899 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-07-23 15:33:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:23,899 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:33:23,899 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:33:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:33:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:33:23,900 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:23,900 INFO L353 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-07-23 15:33:23,900 INFO L414 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-07-23 15:33:23,901 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:24,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:24,138 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:33:24,138 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:33:24,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:33:24,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:33:24,140 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-07-23 15:33:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:24,177 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-23 15:33:24,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:33:24,177 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-07-23 15:33:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:24,178 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:33:24,178 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:33:24,179 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:33:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:33:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 15:33:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:33:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:33:24,182 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-07-23 15:33:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:24,183 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:33:24,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:33:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:33:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:33:24,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:24,184 INFO L353 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-07-23 15:33:24,184 INFO L414 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-07-23 15:33:24,184 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:24,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:24,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:33:24,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:33:24,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:33:24,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:33:24,424 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-07-23 15:33:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:24,468 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:33:24,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:33:24,468 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-07-23 15:33:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:24,469 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:33:24,469 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:33:24,470 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:33:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:33:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:33:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:33:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:33:24,473 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-07-23 15:33:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:24,473 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:33:24,473 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:33:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:33:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:33:24,474 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:24,474 INFO L353 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-07-23 15:33:24,474 INFO L414 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:24,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-07-23 15:33:24,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:24,704 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:24,704 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:33:24,705 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:33:24,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:33:24,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:33:24,707 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-07-23 15:33:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:24,738 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 15:33:24,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:33:24,739 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-07-23 15:33:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:24,739 INFO L225 Difference]: With dead ends: 70 [2018-07-23 15:33:24,740 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 15:33:24,741 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:33:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 15:33:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 15:33:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:33:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:33:24,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-07-23 15:33:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:24,745 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:33:24,745 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:33:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:33:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:33:24,746 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:24,746 INFO L353 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-07-23 15:33:24,746 INFO L414 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-07-23 15:33:24,747 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:24,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:24,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:33:24,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:33:24,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:33:24,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:33:24,999 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-07-23 15:33:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:25,044 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:33:25,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:33:25,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-07-23 15:33:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:25,045 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:33:25,045 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:33:25,046 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:33:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:33:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:33:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:33:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:33:25,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-07-23 15:33:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:25,049 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:33:25,049 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:33:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:33:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:33:25,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:25,050 INFO L353 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-07-23 15:33:25,050 INFO L414 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-07-23 15:33:25,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:25,355 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:25,355 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:33:25,356 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:33:25,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:33:25,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:33:25,358 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-07-23 15:33:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:25,408 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-23 15:33:25,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:33:25,409 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-07-23 15:33:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:25,410 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:33:25,410 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:33:25,411 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:33:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:33:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:33:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:33:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:33:25,414 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-07-23 15:33:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:25,415 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:33:25,415 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:33:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:33:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:33:25,416 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:25,416 INFO L353 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-07-23 15:33:25,416 INFO L414 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-07-23 15:33:25,417 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:25,734 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:25,735 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:33:25,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:33:25,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:33:25,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:33:25,736 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-07-23 15:33:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:25,781 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:33:25,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:33:25,782 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-07-23 15:33:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:25,783 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:33:25,783 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:33:25,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:33:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:33:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:33:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:33:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:33:25,787 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-07-23 15:33:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:25,787 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:33:25,787 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:33:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:33:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:33:25,788 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:25,788 INFO L353 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-07-23 15:33:25,788 INFO L414 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-07-23 15:33:25,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:26,021 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:26,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:33:26,022 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:33:26,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:33:26,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:33:26,024 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-07-23 15:33:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:26,057 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-23 15:33:26,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:33:26,058 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-07-23 15:33:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:26,059 INFO L225 Difference]: With dead ends: 74 [2018-07-23 15:33:26,059 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 15:33:26,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:33:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 15:33:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 15:33:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:33:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:33:26,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-07-23 15:33:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:26,063 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:33:26,063 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:33:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:33:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:33:26,064 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:26,064 INFO L353 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-07-23 15:33:26,064 INFO L414 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-07-23 15:33:26,065 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:26,308 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:26,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:33:26,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:33:26,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:33:26,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:33:26,310 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-07-23 15:33:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:26,355 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:33:26,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:33:26,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-07-23 15:33:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:26,356 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:33:26,356 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:33:26,357 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:33:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:33:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:33:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:33:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:33:26,360 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-07-23 15:33:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:26,361 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:33:26,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:33:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:33:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:33:26,361 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:26,362 INFO L353 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-07-23 15:33:26,362 INFO L414 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-07-23 15:33:26,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:26,605 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:26,605 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:33:26,606 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:33:26,607 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:33:26,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:33:26,607 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-07-23 15:33:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:26,658 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 15:33:26,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:33:26,658 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-07-23 15:33:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:26,659 INFO L225 Difference]: With dead ends: 76 [2018-07-23 15:33:26,659 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:33:26,660 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:33:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:33:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:33:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:33:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:33:26,663 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-07-23 15:33:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:26,663 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:33:26,664 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:33:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:33:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:33:26,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:26,665 INFO L353 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-07-23 15:33:26,665 INFO L414 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-07-23 15:33:26,665 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:26,889 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:26,889 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:33:26,889 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:33:26,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:33:26,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:33:26,891 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-07-23 15:33:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:26,945 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:33:26,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:33:26,945 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-07-23 15:33:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:26,946 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:33:26,946 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:33:26,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:33:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:33:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:33:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:33:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:33:26,950 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-07-23 15:33:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:26,950 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:33:26,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:33:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:33:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:33:26,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:26,952 INFO L353 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-07-23 15:33:26,952 INFO L414 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-07-23 15:33:26,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:27,181 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:27,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:33:27,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:33:27,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:33:27,183 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:33:27,183 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-07-23 15:33:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:27,238 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-23 15:33:27,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:33:27,238 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-07-23 15:33:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:27,239 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:33:27,239 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:33:27,240 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:33:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:33:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:33:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:33:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:33:27,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-07-23 15:33:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:27,243 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:33:27,243 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:33:27,243 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:33:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:33:27,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:27,244 INFO L353 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-07-23 15:33:27,244 INFO L414 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-07-23 15:33:27,244 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:27,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:27,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:33:27,471 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:33:27,472 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:33:27,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:33:27,473 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-07-23 15:33:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:27,529 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:33:27,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:33:27,529 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-07-23 15:33:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:27,530 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:33:27,530 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:33:27,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:33:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:33:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:33:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:33:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:33:27,534 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-07-23 15:33:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:27,534 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:33:27,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:33:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:33:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:33:27,535 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:27,535 INFO L353 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-07-23 15:33:27,535 INFO L414 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-07-23 15:33:27,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:27,765 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:27,765 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:33:27,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:33:27,766 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:33:27,767 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:33:27,767 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-07-23 15:33:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:27,823 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-23 15:33:27,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:33:27,823 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-07-23 15:33:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:27,824 INFO L225 Difference]: With dead ends: 80 [2018-07-23 15:33:27,824 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 15:33:27,825 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:33:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 15:33:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 15:33:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:33:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:33:27,828 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-07-23 15:33:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:27,828 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:33:27,828 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:33:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:33:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:33:27,829 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:27,829 INFO L353 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-07-23 15:33:27,830 INFO L414 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-07-23 15:33:27,830 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,074 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,074 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:33:28,074 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:33:28,075 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:33:28,075 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:33:28,076 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-07-23 15:33:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:28,132 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:33:28,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:33:28,132 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-07-23 15:33:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:28,133 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:33:28,133 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:33:28,134 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:33:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:33:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:33:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:33:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:33:28,137 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-07-23 15:33:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:28,137 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:33:28,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:33:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:33:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:33:28,138 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:28,138 INFO L353 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-07-23 15:33:28,138 INFO L414 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-07-23 15:33:28,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:33:28,381 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:33:28,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:33:28,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:33:28,383 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-07-23 15:33:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:28,441 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 15:33:28,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:33:28,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-07-23 15:33:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:28,442 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:33:28,443 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 15:33:28,443 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:33:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 15:33:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 15:33:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:33:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:33:28,446 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-07-23 15:33:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:28,447 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:33:28,447 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:33:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:33:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:33:28,448 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:28,448 INFO L353 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-07-23 15:33:28,448 INFO L414 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-07-23 15:33:28,448 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:33:28,683 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:33:28,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:33:28,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:33:28,684 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-07-23 15:33:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:28,724 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:33:28,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:33:28,724 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-07-23 15:33:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:28,725 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:33:28,725 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:33:28,726 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:33:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:33:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:33:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:33:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:33:28,729 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-07-23 15:33:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:28,729 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:33:28,729 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:33:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:33:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:33:28,730 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:28,730 INFO L353 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-07-23 15:33:28,731 INFO L414 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-07-23 15:33:28,731 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:33:28,965 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:33:28,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:33:28,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:33:28,967 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-07-23 15:33:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:29,003 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-23 15:33:29,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:33:29,004 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-07-23 15:33:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:29,004 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:33:29,005 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:33:29,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:33:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:33:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:33:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:33:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:33:29,008 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-07-23 15:33:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:29,009 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:33:29,009 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:33:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:33:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:33:29,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:29,010 INFO L353 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-07-23 15:33:29,010 INFO L414 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-07-23 15:33:29,010 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:29,259 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:29,260 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:33:29,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:33:29,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:33:29,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:33:29,261 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-07-23 15:33:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:29,324 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:33:29,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:33:29,325 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-07-23 15:33:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:29,325 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:33:29,325 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:33:29,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:33:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:33:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:33:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:33:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:33:29,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-07-23 15:33:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:29,329 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:33:29,329 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:33:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:33:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:33:29,330 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:29,330 INFO L353 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-07-23 15:33:29,331 INFO L414 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-07-23 15:33:29,331 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:29,583 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:29,583 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:33:29,583 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:33:29,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:33:29,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:33:29,585 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-07-23 15:33:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:29,653 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-23 15:33:29,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:33:29,653 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-07-23 15:33:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:29,654 INFO L225 Difference]: With dead ends: 86 [2018-07-23 15:33:29,654 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 15:33:29,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:33:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 15:33:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 15:33:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:33:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:33:29,658 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-07-23 15:33:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:29,658 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:33:29,658 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:33:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:33:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:33:29,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:29,659 INFO L353 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-07-23 15:33:29,659 INFO L414 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-07-23 15:33:29,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:29,976 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:29,977 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:33:29,977 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:33:29,978 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:33:29,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:33:29,979 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-07-23 15:33:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:30,037 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:33:30,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:33:30,038 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-07-23 15:33:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:30,038 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:33:30,039 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:33:30,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:33:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:33:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:33:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:33:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:33:30,044 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-07-23 15:33:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:30,044 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:33:30,044 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:33:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:33:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:33:30,045 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:30,045 INFO L353 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-07-23 15:33:30,046 INFO L414 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-07-23 15:33:30,046 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:30,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:30,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:33:30,454 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:33:30,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:33:30,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:33:30,455 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-07-23 15:33:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:30,507 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 15:33:30,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:33:30,507 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-07-23 15:33:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:30,508 INFO L225 Difference]: With dead ends: 88 [2018-07-23 15:33:30,508 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 15:33:30,509 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:33:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 15:33:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-23 15:33:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:33:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:33:30,511 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-07-23 15:33:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:30,512 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:33:30,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:33:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:33:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:33:30,513 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:30,513 INFO L353 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-07-23 15:33:30,513 INFO L414 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-07-23 15:33:30,513 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:30,791 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:30,791 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:33:30,791 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:33:30,792 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:33:30,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:33:30,793 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-07-23 15:33:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:30,881 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:33:30,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:33:30,882 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-07-23 15:33:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:30,883 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:33:30,883 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:33:30,884 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:33:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:33:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:33:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:33:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:33:30,886 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-07-23 15:33:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:30,887 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:33:30,887 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:33:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:33:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:33:30,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:30,888 INFO L353 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-07-23 15:33:30,888 INFO L414 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-07-23 15:33:30,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:31,146 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:31,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:33:31,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:33:31,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:33:31,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:33:31,148 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-07-23 15:33:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:31,187 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-23 15:33:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:33:31,187 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-07-23 15:33:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:31,188 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:33:31,188 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:33:31,189 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:33:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:33:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:33:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:33:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:33:31,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-07-23 15:33:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:31,192 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:33:31,192 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:33:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:33:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:33:31,193 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:31,193 INFO L353 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-07-23 15:33:31,193 INFO L414 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-07-23 15:33:31,194 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:31,424 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:31,424 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:33:31,424 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:33:31,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:33:31,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:33:31,426 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-07-23 15:33:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:31,518 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:33:31,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:33:31,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-07-23 15:33:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:31,519 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:33:31,519 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:33:31,520 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:33:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:33:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:33:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:33:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:33:31,523 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-07-23 15:33:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:31,523 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:33:31,523 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:33:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:33:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:33:31,524 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:31,524 INFO L353 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-07-23 15:33:31,525 INFO L414 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-07-23 15:33:31,525 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:31,809 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:31,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:33:31,810 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:33:31,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:33:31,811 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:33:31,811 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-07-23 15:33:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:31,855 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-23 15:33:31,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:33:31,855 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-07-23 15:33:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:31,856 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:33:31,856 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 15:33:31,857 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:33:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 15:33:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 15:33:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:33:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:33:31,861 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-07-23 15:33:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:31,861 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:33:31,861 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:33:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:33:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:33:31,862 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:31,862 INFO L353 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-07-23 15:33:31,863 INFO L414 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-07-23 15:33:31,863 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:32,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:32,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:33:32,157 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:33:32,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:33:32,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:33:32,159 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-07-23 15:33:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:32,232 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:33:32,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:33:32,232 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-07-23 15:33:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:32,233 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:33:32,233 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:33:32,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:33:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:33:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:33:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:33:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:33:32,237 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-07-23 15:33:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:32,237 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:33:32,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:33:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:33:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:33:32,238 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:32,238 INFO L353 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-07-23 15:33:32,239 INFO L414 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-07-23 15:33:32,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:32,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:32,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:33:32,546 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:33:32,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:33:32,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:33:32,548 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-07-23 15:33:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:32,595 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 15:33:32,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:33:32,596 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-07-23 15:33:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:32,597 INFO L225 Difference]: With dead ends: 94 [2018-07-23 15:33:32,597 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:33:32,598 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:33:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:33:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:33:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:33:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:33:32,600 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-07-23 15:33:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:32,601 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:33:32,601 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:33:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:33:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:33:32,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:32,602 INFO L353 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-07-23 15:33:32,602 INFO L414 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-07-23 15:33:32,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:32,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:32,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:33:32,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:33:32,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:33:32,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:33:32,860 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-07-23 15:33:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:32,949 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:33:32,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:33:32,949 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-07-23 15:33:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:32,950 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:33:32,950 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:33:32,951 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:33:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:33:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:33:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:33:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:33:32,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-07-23 15:33:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:32,956 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:33:32,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:33:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:33:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:33:32,957 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:32,957 INFO L353 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-07-23 15:33:32,957 INFO L414 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:32,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-07-23 15:33:32,958 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:33,202 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:33,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:33:33,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:33:33,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:33:33,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:33:33,204 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-07-23 15:33:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:33,271 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-23 15:33:33,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:33:33,271 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-07-23 15:33:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:33,272 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:33:33,273 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:33:33,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:33:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:33:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:33:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:33:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:33:33,276 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-07-23 15:33:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:33,277 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:33:33,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:33:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:33:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:33:33,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:33,278 INFO L353 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-07-23 15:33:33,278 INFO L414 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-07-23 15:33:33,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:33,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:33,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:33:33,523 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:33:33,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:33:33,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:33:33,524 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-07-23 15:33:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:33,559 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:33:33,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:33:33,559 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-07-23 15:33:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:33,560 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:33:33,560 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:33:33,561 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:33:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:33:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:33:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:33:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:33:33,564 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-07-23 15:33:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:33,565 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:33:33,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:33:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:33:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:33:33,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:33,565 INFO L353 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-07-23 15:33:33,566 INFO L414 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-07-23 15:33:33,568 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:33,865 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:33,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:33:33,865 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:33:33,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:33:33,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:33:33,867 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-07-23 15:33:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:33,931 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-23 15:33:33,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:33:33,931 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-07-23 15:33:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:33,932 INFO L225 Difference]: With dead ends: 98 [2018-07-23 15:33:33,932 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 15:33:33,933 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:33:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 15:33:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 15:33:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:33:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:33:33,936 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-07-23 15:33:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:33,936 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:33:33,936 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:33:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:33:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:33:33,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:33,937 INFO L353 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-07-23 15:33:33,937 INFO L414 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-07-23 15:33:33,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:34,173 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:34,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:33:34,173 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:33:34,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:33:34,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:33:34,174 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-07-23 15:33:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:34,256 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:33:34,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:33:34,257 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-07-23 15:33:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:34,257 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:33:34,257 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:33:34,258 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:33:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:33:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:33:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:33:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:33:34,261 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-07-23 15:33:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:34,261 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:33:34,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:33:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:33:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:33:34,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:34,262 INFO L353 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-07-23 15:33:34,262 INFO L414 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-07-23 15:33:34,263 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:34,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:34,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:33:34,586 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:33:34,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:33:34,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:33:34,588 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-07-23 15:33:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:34,663 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 15:33:34,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:33:34,663 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-07-23 15:33:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:34,664 INFO L225 Difference]: With dead ends: 100 [2018-07-23 15:33:34,664 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 15:33:34,665 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:33:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 15:33:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-23 15:33:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:33:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:33:34,667 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-07-23 15:33:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:34,668 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:33:34,668 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:33:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:33:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:33:34,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:34,669 INFO L353 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-07-23 15:33:34,669 INFO L414 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-07-23 15:33:34,669 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:35,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:35,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:33:35,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:33:35,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:33:35,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:33:35,060 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-07-23 15:33:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:35,116 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:33:35,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:33:35,116 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-07-23 15:33:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:35,117 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:33:35,118 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:33:35,119 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:33:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:33:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:33:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:33:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:33:35,123 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-07-23 15:33:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:35,123 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:33:35,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:33:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:33:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:33:35,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:35,124 INFO L353 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-07-23 15:33:35,124 INFO L414 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-07-23 15:33:35,124 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:35,402 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:35,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:33:35,403 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:33:35,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:33:35,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:33:35,405 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-07-23 15:33:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:35,449 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-23 15:33:35,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:33:35,450 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-07-23 15:33:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:35,450 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:33:35,450 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:33:35,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:33:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:33:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:33:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:33:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:33:35,454 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-07-23 15:33:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:35,454 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:33:35,454 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:33:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:33:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:33:35,455 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:35,455 INFO L353 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-07-23 15:33:35,455 INFO L414 AbstractCegarLoop]: === Iteration 97 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-07-23 15:33:35,455 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:35,717 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:35,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:33:35,718 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:33:35,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:33:35,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:33:35,719 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-07-23 15:33:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:35,765 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:33:35,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:33:35,765 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-07-23 15:33:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:35,766 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:33:35,766 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:33:35,767 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:33:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:33:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:33:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:33:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:33:35,769 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-07-23 15:33:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:35,770 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:33:35,770 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:33:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:33:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:33:35,771 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:35,771 INFO L353 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-07-23 15:33:35,771 INFO L414 AbstractCegarLoop]: === Iteration 98 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-07-23 15:33:35,771 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:36,024 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:36,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:33:36,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:33:36,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:33:36,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:33:36,025 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-07-23 15:33:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:36,092 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-23 15:33:36,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:33:36,093 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-07-23 15:33:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:36,094 INFO L225 Difference]: With dead ends: 104 [2018-07-23 15:33:36,094 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 15:33:36,095 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:33:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 15:33:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 15:33:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:33:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:33:36,098 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-07-23 15:33:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:36,098 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:33:36,098 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:33:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:33:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:33:36,099 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:36,099 INFO L353 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-07-23 15:33:36,099 INFO L414 AbstractCegarLoop]: === Iteration 99 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-07-23 15:33:36,099 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:36,372 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:36,372 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:33:36,372 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:33:36,373 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:33:36,373 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:33:36,374 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-07-23 15:33:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:36,427 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:33:36,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:33:36,427 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-07-23 15:33:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:36,428 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:33:36,428 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:33:36,428 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:33:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:33:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:33:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:33:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:33:36,431 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-07-23 15:33:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:36,431 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:33:36,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:33:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:33:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:33:36,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:36,432 INFO L353 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-07-23 15:33:36,432 INFO L414 AbstractCegarLoop]: === Iteration 100 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-07-23 15:33:36,432 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:36,707 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:36,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:33:36,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:33:36,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:33:36,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:33:36,709 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-07-23 15:33:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:36,766 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 15:33:36,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:33:36,766 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-07-23 15:33:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:36,767 INFO L225 Difference]: With dead ends: 106 [2018-07-23 15:33:36,767 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 15:33:36,768 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:33:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 15:33:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 15:33:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:33:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:33:36,771 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-07-23 15:33:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:36,771 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:33:36,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:33:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:33:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:33:36,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:36,772 INFO L353 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-07-23 15:33:36,772 INFO L414 AbstractCegarLoop]: === Iteration 101 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-07-23 15:33:36,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:37,048 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:37,048 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:33:37,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:33:37,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:33:37,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:33:37,050 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-07-23 15:33:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:37,109 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:33:37,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:33:37,109 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-07-23 15:33:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:37,110 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:33:37,110 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:33:37,111 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:33:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:33:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:33:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:33:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:33:37,114 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-07-23 15:33:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:37,114 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:33:37,114 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:33:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:33:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:33:37,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:37,115 INFO L353 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-07-23 15:33:37,115 INFO L414 AbstractCegarLoop]: === Iteration 102 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-07-23 15:33:37,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:37,471 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:37,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:33:37,471 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:33:37,472 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:33:37,472 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:33:37,473 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-07-23 15:33:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:37,541 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-23 15:33:37,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:33:37,541 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-07-23 15:33:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:37,542 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:33:37,543 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:33:37,544 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:33:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:33:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:33:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:33:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:33:37,547 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-07-23 15:33:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:37,547 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:33:37,547 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:33:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:33:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:33:37,548 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:37,548 INFO L353 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-07-23 15:33:37,548 INFO L414 AbstractCegarLoop]: === Iteration 103 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-07-23 15:33:37,548 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:37,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:37,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:33:37,787 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:33:37,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:33:37,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:33:37,789 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-07-23 15:33:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:37,871 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:33:37,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:33:37,872 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-07-23 15:33:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:37,872 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:33:37,872 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:33:37,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:33:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:33:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:33:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:33:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:33:37,876 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-07-23 15:33:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:37,876 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:33:37,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:33:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:33:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:33:37,877 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:37,877 INFO L353 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-07-23 15:33:37,877 INFO L414 AbstractCegarLoop]: === Iteration 104 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-07-23 15:33:37,877 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:38,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:38,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:33:38,124 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:33:38,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:33:38,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:33:38,126 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-07-23 15:33:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:38,218 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-23 15:33:38,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:33:38,219 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-07-23 15:33:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:38,219 INFO L225 Difference]: With dead ends: 110 [2018-07-23 15:33:38,219 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 15:33:38,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:33:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 15:33:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 15:33:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:33:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:33:38,223 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-07-23 15:33:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:38,223 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:33:38,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:33:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:33:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:33:38,223 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:38,224 INFO L353 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-07-23 15:33:38,224 INFO L414 AbstractCegarLoop]: === Iteration 105 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:38,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-07-23 15:33:38,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:38,531 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:38,531 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:33:38,532 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:33:38,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:33:38,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:33:38,534 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-07-23 15:33:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:38,589 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:33:38,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:33:38,589 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-07-23 15:33:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:38,590 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:33:38,590 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:33:38,591 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:33:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:33:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:33:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:33:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:33:38,595 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-07-23 15:33:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:38,595 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:33:38,595 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:33:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:33:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:33:38,596 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:38,596 INFO L353 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-07-23 15:33:38,596 INFO L414 AbstractCegarLoop]: === Iteration 106 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-07-23 15:33:38,596 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:38,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:38,877 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:33:38,877 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:33:38,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:33:38,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:33:38,878 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-07-23 15:33:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:38,929 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 15:33:38,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:33:38,929 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-07-23 15:33:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:38,929 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:33:38,929 INFO L226 Difference]: Without dead ends: 110 [2018-07-23 15:33:38,930 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:33:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-23 15:33:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-23 15:33:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:33:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:33:38,933 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-07-23 15:33:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:38,933 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:33:38,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:33:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:33:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:33:38,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:38,934 INFO L353 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-07-23 15:33:38,934 INFO L414 AbstractCegarLoop]: === Iteration 107 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-07-23 15:33:38,935 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:39,284 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:39,284 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:33:39,285 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:33:39,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:33:39,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:33:39,287 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-07-23 15:33:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:39,387 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:33:39,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:33:39,387 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-07-23 15:33:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:39,388 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:33:39,388 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:33:39,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:33:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:33:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:33:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:33:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:33:39,393 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-07-23 15:33:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:39,394 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:33:39,394 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:33:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:33:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:33:39,395 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:39,395 INFO L353 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-07-23 15:33:39,395 INFO L414 AbstractCegarLoop]: === Iteration 108 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-07-23 15:33:39,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:39,709 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:39,709 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:33:39,709 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:33:39,711 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:33:39,711 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:33:39,712 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-07-23 15:33:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:39,809 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-23 15:33:39,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:33:39,809 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-07-23 15:33:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:39,810 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:33:39,810 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:33:39,811 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:33:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:33:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:33:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:33:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:33:39,815 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-07-23 15:33:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:39,816 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:33:39,816 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:33:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:33:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:33:39,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:39,817 INFO L353 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-07-23 15:33:39,817 INFO L414 AbstractCegarLoop]: === Iteration 109 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-07-23 15:33:39,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:40,201 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:40,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:33:40,202 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:33:40,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:33:40,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:33:40,204 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-07-23 15:33:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:40,294 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:33:40,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:33:40,294 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-07-23 15:33:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:40,294 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:33:40,294 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:33:40,295 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:33:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:33:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:33:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:33:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:33:40,297 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-07-23 15:33:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:40,298 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:33:40,298 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:33:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:33:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:33:40,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:40,298 INFO L353 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-07-23 15:33:40,298 INFO L414 AbstractCegarLoop]: === Iteration 110 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-07-23 15:33:40,299 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:40,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:40,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:33:40,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:33:40,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:33:40,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:33:40,602 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-07-23 15:33:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:40,729 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-23 15:33:40,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:33:40,729 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-07-23 15:33:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:40,730 INFO L225 Difference]: With dead ends: 116 [2018-07-23 15:33:40,730 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 15:33:40,731 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:33:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 15:33:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 15:33:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:33:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:33:40,735 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-07-23 15:33:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:40,735 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:33:40,735 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:33:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:33:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:33:40,736 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:40,736 INFO L353 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-07-23 15:33:40,736 INFO L414 AbstractCegarLoop]: === Iteration 111 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-07-23 15:33:40,736 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:41,032 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:41,032 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:33:41,033 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:33:41,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:33:41,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:33:41,034 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-07-23 15:33:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:41,082 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:33:41,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:33:41,083 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-07-23 15:33:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:41,083 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:33:41,083 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:33:41,084 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:33:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:33:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:33:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:33:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:33:41,087 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-07-23 15:33:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:41,087 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:33:41,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:33:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:33:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:33:41,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:41,088 INFO L353 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-07-23 15:33:41,088 INFO L414 AbstractCegarLoop]: === Iteration 112 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-07-23 15:33:41,088 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:41,421 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:41,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:33:41,421 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:33:41,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:33:41,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:33:41,423 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-07-23 15:33:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:41,537 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 15:33:41,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:33:41,537 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-07-23 15:33:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:41,537 INFO L225 Difference]: With dead ends: 118 [2018-07-23 15:33:41,537 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 15:33:41,539 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:33:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 15:33:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 15:33:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:33:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:33:41,541 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-07-23 15:33:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:41,541 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:33:41,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:33:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:33:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:33:41,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:41,542 INFO L353 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-07-23 15:33:41,542 INFO L414 AbstractCegarLoop]: === Iteration 113 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-07-23 15:33:41,542 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:41,914 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:41,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:33:41,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:33:41,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:33:41,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:33:41,917 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-07-23 15:33:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:42,002 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:33:42,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:33:42,002 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-07-23 15:33:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:42,003 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:33:42,003 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:33:42,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:33:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:33:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:33:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:33:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:33:42,006 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-07-23 15:33:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:42,006 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:33:42,007 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:33:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:33:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:33:42,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:42,007 INFO L353 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-07-23 15:33:42,007 INFO L414 AbstractCegarLoop]: === Iteration 114 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-07-23 15:33:42,008 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:42,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:42,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:33:42,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:33:42,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:33:42,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:33:42,329 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-07-23 15:33:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:42,489 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-23 15:33:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:33:42,490 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-07-23 15:33:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:42,490 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:33:42,490 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:33:42,495 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:33:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:33:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:33:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:33:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:33:42,499 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-07-23 15:33:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:42,499 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:33:42,499 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:33:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:33:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:33:42,500 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:42,500 INFO L353 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-07-23 15:33:42,501 INFO L414 AbstractCegarLoop]: === Iteration 115 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-07-23 15:33:42,501 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:42,857 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:42,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:33:42,857 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:33:42,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:33:42,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:33:42,859 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-07-23 15:33:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:42,965 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:33:42,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:33:42,966 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-07-23 15:33:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:42,966 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:33:42,966 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:33:42,968 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:33:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:33:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:33:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:33:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:33:42,971 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-07-23 15:33:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:42,972 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:33:42,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:33:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:33:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:33:42,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:42,973 INFO L353 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-07-23 15:33:42,973 INFO L414 AbstractCegarLoop]: === Iteration 116 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-07-23 15:33:42,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:43,402 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:43,402 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:33:43,402 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:33:43,403 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:33:43,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:33:43,404 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-07-23 15:33:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:43,497 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-23 15:33:43,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:33:43,497 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-07-23 15:33:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:43,498 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:33:43,498 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 15:33:43,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:33:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 15:33:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 15:33:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:33:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:33:43,502 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-07-23 15:33:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:43,502 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:33:43,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:33:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:33:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:33:43,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:43,503 INFO L353 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-07-23 15:33:43,503 INFO L414 AbstractCegarLoop]: === Iteration 117 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-07-23 15:33:43,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:43,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:43,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:33:43,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:33:43,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:33:43,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:33:43,860 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-07-23 15:33:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:43,955 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:33:43,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:33:43,955 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-07-23 15:33:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:43,955 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:33:43,955 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:33:43,956 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:33:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:33:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:33:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:33:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:33:43,959 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-07-23 15:33:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:43,960 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:33:43,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:33:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:33:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:33:43,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:43,961 INFO L353 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-07-23 15:33:43,961 INFO L414 AbstractCegarLoop]: === Iteration 118 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:43,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-07-23 15:33:43,961 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:44,416 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:44,416 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:33:44,416 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:33:44,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:33:44,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:33:44,418 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-07-23 15:33:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:44,583 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 15:33:44,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:33:44,583 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-07-23 15:33:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:44,583 INFO L225 Difference]: With dead ends: 124 [2018-07-23 15:33:44,584 INFO L226 Difference]: Without dead ends: 122 [2018-07-23 15:33:44,585 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:33:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-23 15:33:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-23 15:33:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:33:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:33:44,589 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-07-23 15:33:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:44,590 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:33:44,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:33:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:33:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:33:44,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:44,591 INFO L353 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-07-23 15:33:44,591 INFO L414 AbstractCegarLoop]: === Iteration 119 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:44,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-07-23 15:33:44,591 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:44,996 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:44,996 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:33:44,996 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:33:44,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:33:44,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:33:44,999 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-07-23 15:33:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:45,127 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:33:45,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:33:45,128 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-07-23 15:33:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:45,128 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:33:45,128 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:33:45,130 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:33:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:33:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:33:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:33:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:33:45,133 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-07-23 15:33:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:45,134 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:33:45,134 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:33:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:33:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:33:45,134 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:45,135 INFO L353 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-07-23 15:33:45,135 INFO L414 AbstractCegarLoop]: === Iteration 120 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-07-23 15:33:45,135 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:45,617 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 15:33:45,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:45,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:33:45,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:33:45,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:33:45,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:33:45,620 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-07-23 15:33:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:45,694 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-23 15:33:45,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:33:45,694 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-07-23 15:33:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:45,694 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:33:45,694 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:33:45,695 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:33:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:33:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:33:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:33:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:33:45,699 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-07-23 15:33:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:45,699 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:33:45,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:33:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:33:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:33:45,700 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:45,700 INFO L353 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-07-23 15:33:45,700 INFO L414 AbstractCegarLoop]: === Iteration 121 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:45,700 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-07-23 15:33:45,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:46,120 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:46,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:33:46,121 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:33:46,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:33:46,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:33:46,123 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-07-23 15:33:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:46,271 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:33:46,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:33:46,271 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-07-23 15:33:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:46,272 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:33:46,272 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:33:46,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:33:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:33:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:33:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:33:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:33:46,276 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-07-23 15:33:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:46,277 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:33:46,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:33:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:33:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:33:46,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:46,278 INFO L353 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-07-23 15:33:46,278 INFO L414 AbstractCegarLoop]: === Iteration 122 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-07-23 15:33:46,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:46,694 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:46,694 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:33:46,694 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:33:46,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:33:46,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:33:46,696 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-07-23 15:33:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:46,819 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-23 15:33:46,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:33:46,819 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-07-23 15:33:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:46,820 INFO L225 Difference]: With dead ends: 128 [2018-07-23 15:33:46,820 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 15:33:46,822 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:33:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 15:33:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 15:33:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:33:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:33:46,825 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-07-23 15:33:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:46,825 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:33:46,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:33:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:33:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:33:46,826 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:46,826 INFO L353 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-07-23 15:33:46,826 INFO L414 AbstractCegarLoop]: === Iteration 123 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-07-23 15:33:46,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:47,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:47,497 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:33:47,497 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:33:47,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:33:47,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:33:47,500 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-07-23 15:33:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:47,814 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:33:47,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:33:47,814 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-07-23 15:33:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:47,815 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:33:47,815 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:33:47,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:33:47,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:33:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:33:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:33:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:33:47,819 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-07-23 15:33:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:47,819 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:33:47,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:33:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:33:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:33:47,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:47,820 INFO L353 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-07-23 15:33:47,820 INFO L414 AbstractCegarLoop]: === Iteration 124 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-07-23 15:33:47,821 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:48,386 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:48,386 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:33:48,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:33:48,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:33:48,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:33:48,389 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-07-23 15:33:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:48,502 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 15:33:48,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:33:48,502 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-07-23 15:33:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:48,502 INFO L225 Difference]: With dead ends: 130 [2018-07-23 15:33:48,502 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 15:33:48,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:33:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 15:33:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 15:33:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:33:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:33:48,506 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-07-23 15:33:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:48,507 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:33:48,507 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:33:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:33:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:33:48,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:48,508 INFO L353 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-07-23 15:33:48,508 INFO L414 AbstractCegarLoop]: === Iteration 125 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-07-23 15:33:48,508 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:49,145 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:49,145 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:33:49,145 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:33:49,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:33:49,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:33:49,147 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-07-23 15:33:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:49,311 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:33:49,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:33:49,312 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-07-23 15:33:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:49,312 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:33:49,312 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:33:49,314 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:33:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:33:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:33:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:33:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:33:49,317 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-07-23 15:33:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:49,317 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:33:49,317 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:33:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:33:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:33:49,318 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:49,318 INFO L353 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-07-23 15:33:49,319 INFO L414 AbstractCegarLoop]: === Iteration 126 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-07-23 15:33:49,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:49,690 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:49,691 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:33:49,691 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:33:49,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:33:49,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:33:49,693 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-07-23 15:33:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:49,770 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-23 15:33:49,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:33:49,770 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-07-23 15:33:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:49,771 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:33:49,771 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:33:49,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:33:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:33:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:33:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:33:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:33:49,775 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-07-23 15:33:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:49,775 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:33:49,775 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:33:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:33:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:33:49,776 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:49,776 INFO L353 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-07-23 15:33:49,776 INFO L414 AbstractCegarLoop]: === Iteration 127 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-07-23 15:33:49,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:50,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:50,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:33:50,184 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:33:50,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:33:50,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:33:50,187 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-07-23 15:33:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:50,344 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:33:50,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:33:50,345 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-07-23 15:33:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:50,345 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:33:50,345 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:33:50,347 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:33:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:33:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:33:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:33:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:33:50,350 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-07-23 15:33:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:50,350 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:33:50,350 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:33:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:33:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:33:50,351 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:50,351 INFO L353 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-07-23 15:33:50,351 INFO L414 AbstractCegarLoop]: === Iteration 128 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:50,352 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-07-23 15:33:50,352 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:50,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:50,783 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:33:50,783 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:33:50,785 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:33:50,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:33:50,787 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-07-23 15:33:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:50,865 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-23 15:33:50,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:33:50,866 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-07-23 15:33:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:50,866 INFO L225 Difference]: With dead ends: 134 [2018-07-23 15:33:50,866 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 15:33:50,868 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:33:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 15:33:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 15:33:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:33:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:33:50,873 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-07-23 15:33:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:50,873 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:33:50,873 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:33:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:33:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:33:50,874 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:50,874 INFO L353 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-07-23 15:33:50,874 INFO L414 AbstractCegarLoop]: === Iteration 129 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-07-23 15:33:50,875 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:51,379 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:51,379 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:33:51,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:33:51,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:33:51,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:33:51,382 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-07-23 15:33:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:51,534 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:33:51,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:33:51,534 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-07-23 15:33:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:51,535 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:33:51,535 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:33:51,536 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:33:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:33:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:33:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:33:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:33:51,539 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-07-23 15:33:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:51,539 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:33:51,539 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:33:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:33:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:33:51,540 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:51,540 INFO L353 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-07-23 15:33:51,540 INFO L414 AbstractCegarLoop]: === Iteration 130 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-07-23 15:33:51,540 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:51,938 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:51,938 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:33:51,938 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:33:51,940 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:33:51,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:33:51,940 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-07-23 15:33:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:52,115 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 15:33:52,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:33:52,115 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-07-23 15:33:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:52,115 INFO L225 Difference]: With dead ends: 136 [2018-07-23 15:33:52,115 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 15:33:52,117 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:33:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 15:33:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-23 15:33:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:33:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:33:52,119 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-07-23 15:33:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:52,119 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:33:52,119 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:33:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:33:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:33:52,120 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:52,120 INFO L353 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-07-23 15:33:52,120 INFO L414 AbstractCegarLoop]: === Iteration 131 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-07-23 15:33:52,120 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:52,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:52,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:33:52,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:33:52,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:33:52,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:33:52,520 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-07-23 15:33:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:52,650 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:33:52,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:33:52,650 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-07-23 15:33:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:52,651 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:33:52,651 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:33:52,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:33:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:33:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:33:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:33:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:33:52,655 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-07-23 15:33:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:52,656 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:33:52,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:33:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:33:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:33:52,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:52,657 INFO L353 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-07-23 15:33:52,657 INFO L414 AbstractCegarLoop]: === Iteration 132 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-07-23 15:33:52,657 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:53,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:53,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:33:53,107 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:33:53,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:33:53,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:33:53,109 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-07-23 15:33:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:53,277 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-23 15:33:53,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:33:53,277 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-07-23 15:33:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:53,278 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:33:53,278 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:33:53,279 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:33:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:33:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:33:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:33:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:33:53,281 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-07-23 15:33:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:53,281 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:33:53,281 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:33:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:33:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:33:53,282 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:53,282 INFO L353 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-07-23 15:33:53,282 INFO L414 AbstractCegarLoop]: === Iteration 133 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-07-23 15:33:53,283 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:53,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:53,745 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:33:53,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:33:53,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:33:53,747 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:33:53,747 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-07-23 15:33:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:53,907 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:33:53,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:33:53,907 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-07-23 15:33:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:53,908 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:33:53,908 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:33:53,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:33:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:33:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:33:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:33:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:33:53,911 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-07-23 15:33:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:53,911 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:33:53,911 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:33:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:33:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:33:53,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:53,912 INFO L353 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-07-23 15:33:53,912 INFO L414 AbstractCegarLoop]: === Iteration 134 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-07-23 15:33:53,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:54,397 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:54,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:33:54,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:33:54,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:33:54,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:33:54,401 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-07-23 15:33:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:54,552 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-23 15:33:54,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:33:54,553 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-07-23 15:33:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:54,553 INFO L225 Difference]: With dead ends: 140 [2018-07-23 15:33:54,553 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 15:33:54,555 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:33:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 15:33:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 15:33:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:33:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:33:54,558 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-07-23 15:33:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:54,558 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:33:54,558 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:33:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:33:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:33:54,559 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:54,559 INFO L353 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-07-23 15:33:54,560 INFO L414 AbstractCegarLoop]: === Iteration 135 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:54,560 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-07-23 15:33:54,560 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:55,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:55,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:33:55,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:33:55,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:33:55,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:33:55,038 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-07-23 15:33:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:55,268 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:33:55,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:33:55,269 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-07-23 15:33:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:55,269 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:33:55,269 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:33:55,270 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:33:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:33:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:33:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:33:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:33:55,272 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-07-23 15:33:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:55,272 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:33:55,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:33:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:33:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:33:55,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:55,273 INFO L353 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-07-23 15:33:55,273 INFO L414 AbstractCegarLoop]: === Iteration 136 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-07-23 15:33:55,273 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:55,733 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:55,733 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:33:55,733 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:33:55,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:33:55,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:33:55,735 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-07-23 15:33:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:55,957 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 15:33:55,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:33:55,957 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-07-23 15:33:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:55,957 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:33:55,957 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 15:33:55,958 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:33:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 15:33:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 15:33:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:33:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:33:55,961 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-07-23 15:33:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:55,961 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:33:55,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:33:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:33:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:33:55,961 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:55,961 INFO L353 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-07-23 15:33:55,961 INFO L414 AbstractCegarLoop]: === Iteration 137 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-07-23 15:33:55,962 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:56,442 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:56,442 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:33:56,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:33:56,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:33:56,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:33:56,445 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-07-23 15:33:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:56,548 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:33:56,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:33:56,548 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-07-23 15:33:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:56,549 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:33:56,549 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:33:56,550 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:33:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:33:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:33:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:33:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:33:56,552 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-07-23 15:33:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:56,552 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:33:56,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:33:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:33:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:33:56,553 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:56,553 INFO L353 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-07-23 15:33:56,553 INFO L414 AbstractCegarLoop]: === Iteration 138 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-07-23 15:33:56,554 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:57,019 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:57,019 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:33:57,020 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:33:57,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:33:57,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:33:57,023 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-07-23 15:33:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:57,238 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-23 15:33:57,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:33:57,238 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-07-23 15:33:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:57,238 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:33:57,238 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:33:57,240 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:33:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:33:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:33:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:33:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:33:57,244 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-07-23 15:33:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:57,244 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:33:57,244 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:33:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:33:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:33:57,245 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:57,246 INFO L353 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-07-23 15:33:57,246 INFO L414 AbstractCegarLoop]: === Iteration 139 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-07-23 15:33:57,246 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:57,822 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:57,822 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:33:57,822 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:33:57,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:33:57,824 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:33:57,824 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-07-23 15:33:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:58,035 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:33:58,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:33:58,035 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-07-23 15:33:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:58,036 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:33:58,036 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:33:58,037 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:33:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:33:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:33:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:33:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:33:58,038 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-07-23 15:33:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:58,039 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:33:58,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:33:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:33:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:33:58,039 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:58,039 INFO L353 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-07-23 15:33:58,039 INFO L414 AbstractCegarLoop]: === Iteration 140 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-07-23 15:33:58,040 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:58,485 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:58,486 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:33:58,486 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:33:58,487 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:33:58,488 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:33:58,488 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-07-23 15:33:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:58,748 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-23 15:33:58,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:33:58,748 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-07-23 15:33:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:58,748 INFO L225 Difference]: With dead ends: 146 [2018-07-23 15:33:58,748 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 15:33:58,750 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:33:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 15:33:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 15:33:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:33:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:33:58,752 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-07-23 15:33:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:58,752 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:33:58,752 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:33:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:33:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:33:58,752 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:58,752 INFO L353 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-07-23 15:33:58,752 INFO L414 AbstractCegarLoop]: === Iteration 141 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:58,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-07-23 15:33:58,753 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:59,213 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:59,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:33:59,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:33:59,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:33:59,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:33:59,215 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-07-23 15:33:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:59,419 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:33:59,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:33:59,420 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-07-23 15:33:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:59,420 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:33:59,420 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:33:59,421 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:33:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:33:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:33:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:33:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:33:59,423 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-07-23 15:33:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:59,423 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:33:59,423 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:33:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:33:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:33:59,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:59,424 INFO L353 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-07-23 15:33:59,424 INFO L414 AbstractCegarLoop]: === Iteration 142 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-07-23 15:33:59,424 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:59,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:59,964 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:33:59,964 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:33:59,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:33:59,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:33:59,967 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-07-23 15:34:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:00,071 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 15:34:00,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:34:00,071 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-07-23 15:34:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:00,071 INFO L225 Difference]: With dead ends: 148 [2018-07-23 15:34:00,071 INFO L226 Difference]: Without dead ends: 146 [2018-07-23 15:34:00,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:34:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-23 15:34:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-23 15:34:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:34:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:34:00,074 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-07-23 15:34:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:00,075 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:34:00,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:34:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:34:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:34:00,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:00,075 INFO L353 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-07-23 15:34:00,075 INFO L414 AbstractCegarLoop]: === Iteration 143 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-07-23 15:34:00,076 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:00,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:00,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:34:00,785 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:34:00,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:34:00,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:34:00,788 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-07-23 15:34:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:00,910 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:34:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:34:00,910 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-07-23 15:34:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:00,910 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:34:00,911 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:34:00,912 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:34:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:34:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:34:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:34:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:34:00,914 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-07-23 15:34:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:00,914 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:34:00,914 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:34:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:34:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:34:00,915 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:00,915 INFO L353 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-07-23 15:34:00,915 INFO L414 AbstractCegarLoop]: === Iteration 144 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-07-23 15:34:00,915 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:01,428 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:01,428 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:34:01,428 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:34:01,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:34:01,431 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:34:01,432 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-07-23 15:34:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:01,684 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-23 15:34:01,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:34:01,684 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-07-23 15:34:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:01,685 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:34:01,685 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:34:01,687 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:34:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:34:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:34:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:34:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:34:01,690 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-07-23 15:34:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:01,690 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:34:01,690 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:34:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:34:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:34:01,691 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:01,691 INFO L353 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-07-23 15:34:01,691 INFO L414 AbstractCegarLoop]: === Iteration 145 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-07-23 15:34:01,692 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:02,172 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:02,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:34:02,173 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:34:02,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:34:02,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:34:02,175 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-07-23 15:34:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:02,444 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:34:02,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:34:02,444 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-07-23 15:34:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:02,445 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:34:02,445 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:34:02,446 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:34:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:34:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:34:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:34:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:34:02,448 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-07-23 15:34:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:02,448 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:34:02,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:34:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:34:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:34:02,449 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:02,449 INFO L353 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-07-23 15:34:02,449 INFO L414 AbstractCegarLoop]: === Iteration 146 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-07-23 15:34:02,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:02,960 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:02,960 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:34:02,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:34:02,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:34:02,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:34:02,963 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-07-23 15:34:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:03,225 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-23 15:34:03,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:34:03,225 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-07-23 15:34:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:03,225 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:34:03,226 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 15:34:03,227 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:34:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 15:34:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 15:34:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:34:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:34:03,229 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-07-23 15:34:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:03,230 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:34:03,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:34:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:34:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:34:03,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:03,231 INFO L353 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-07-23 15:34:03,231 INFO L414 AbstractCegarLoop]: === Iteration 147 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-07-23 15:34:03,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:03,809 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:03,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:34:03,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:34:03,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:34:03,811 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:34:03,811 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-07-23 15:34:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:04,103 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:34:04,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:34:04,103 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-07-23 15:34:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:04,104 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:34:04,104 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:34:04,106 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:34:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:34:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:34:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:34:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:34:04,109 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-07-23 15:34:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:04,109 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:34:04,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:34:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:34:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:34:04,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:04,110 INFO L353 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-07-23 15:34:04,110 INFO L414 AbstractCegarLoop]: === Iteration 148 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:04,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-07-23 15:34:04,111 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:04,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:04,776 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:34:04,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:34:04,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:34:04,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:34:04,780 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-07-23 15:34:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:05,133 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 15:34:05,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:34:05,133 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-07-23 15:34:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:05,134 INFO L225 Difference]: With dead ends: 154 [2018-07-23 15:34:05,134 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 15:34:05,135 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:34:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 15:34:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 15:34:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:34:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:34:05,137 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-07-23 15:34:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:05,138 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:34:05,138 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:34:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:34:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:34:05,139 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:05,139 INFO L353 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-07-23 15:34:05,139 INFO L414 AbstractCegarLoop]: === Iteration 149 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-07-23 15:34:05,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:05,733 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:05,733 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:34:05,733 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:34:05,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:34:05,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:34:05,735 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-07-23 15:34:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:06,051 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:34:06,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:34:06,051 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-07-23 15:34:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:06,051 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:34:06,051 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:34:06,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:34:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:34:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:34:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:34:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:34:06,056 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-07-23 15:34:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:06,056 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:34:06,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:34:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:34:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:34:06,057 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:06,057 INFO L353 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-07-23 15:34:06,057 INFO L414 AbstractCegarLoop]: === Iteration 150 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-07-23 15:34:06,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:06,628 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:06,628 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:34:06,628 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:34:06,630 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:34:06,631 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:34:06,631 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-07-23 15:34:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:06,962 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-23 15:34:06,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:34:06,962 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-07-23 15:34:06,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:06,963 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:34:06,963 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:34:06,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:34:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:34:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:34:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:34:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:34:06,967 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-07-23 15:34:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:06,967 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:34:06,967 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:34:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:34:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:34:06,968 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:06,968 INFO L353 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-07-23 15:34:06,968 INFO L414 AbstractCegarLoop]: === Iteration 151 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-07-23 15:34:06,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:07,498 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:07,498 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:34:07,498 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:34:07,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:34:07,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:34:07,501 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-07-23 15:34:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:07,849 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:34:07,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:34:07,849 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-07-23 15:34:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:07,849 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:34:07,849 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:34:07,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:34:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:34:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:34:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:34:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:34:07,853 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-07-23 15:34:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:07,853 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:34:07,853 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:34:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:34:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:34:07,854 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:07,854 INFO L353 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-07-23 15:34:07,854 INFO L414 AbstractCegarLoop]: === Iteration 152 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-07-23 15:34:07,854 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:08,417 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:08,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:34:08,417 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:34:08,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:34:08,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:34:08,420 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-07-23 15:34:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:08,752 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-23 15:34:08,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:34:08,752 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-07-23 15:34:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:08,753 INFO L225 Difference]: With dead ends: 158 [2018-07-23 15:34:08,753 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 15:34:08,754 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:34:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 15:34:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 15:34:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:34:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:34:08,756 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-07-23 15:34:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:08,757 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:34:08,757 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:34:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:34:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:34:08,757 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:08,757 INFO L353 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-07-23 15:34:08,757 INFO L414 AbstractCegarLoop]: === Iteration 153 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-07-23 15:34:08,758 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:09,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:09,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:34:09,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:34:09,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:34:09,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:34:09,349 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-07-23 15:34:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:09,671 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:34:09,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:34:09,671 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-07-23 15:34:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:09,671 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:34:09,671 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:34:09,672 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:34:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:34:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:34:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:34:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:34:09,675 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-07-23 15:34:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:09,676 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:34:09,676 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:34:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:34:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:34:09,676 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:09,677 INFO L353 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-07-23 15:34:09,677 INFO L414 AbstractCegarLoop]: === Iteration 154 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-07-23 15:34:09,677 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:10,288 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:10,288 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:34:10,288 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:34:10,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:34:10,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:34:10,291 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-07-23 15:34:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:10,627 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 15:34:10,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:34:10,627 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-07-23 15:34:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:10,627 INFO L225 Difference]: With dead ends: 160 [2018-07-23 15:34:10,627 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 15:34:10,628 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:34:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 15:34:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-23 15:34:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:34:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:34:10,631 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-07-23 15:34:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:10,631 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:34:10,631 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:34:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:34:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:34:10,631 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:10,632 INFO L353 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-07-23 15:34:10,632 INFO L414 AbstractCegarLoop]: === Iteration 155 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1072857888, now seen corresponding path program 154 times [2018-07-23 15:34:10,632 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:11,246 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:11,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:34:11,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:34:11,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:34:11,249 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:34:11,249 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-07-23 15:34:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:11,572 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:34:11,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:34:11,572 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-07-23 15:34:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:11,573 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:34:11,573 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:34:11,574 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:34:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:34:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:34:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:34:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:34:11,577 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-07-23 15:34:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:11,577 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:34:11,578 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:34:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:34:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:34:11,578 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:11,578 INFO L353 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-07-23 15:34:11,578 INFO L414 AbstractCegarLoop]: === Iteration 156 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1101147706, now seen corresponding path program 155 times [2018-07-23 15:34:11,579 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:12,310 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:12,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:34:12,311 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:34:12,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:34:12,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:34:12,314 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-07-23 15:34:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:12,551 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-23 15:34:12,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:34:12,551 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-07-23 15:34:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:12,552 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:34:12,552 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:34:12,554 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:34:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:34:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:34:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:34:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:34:12,556 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-07-23 15:34:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:12,556 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:34:12,556 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:34:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:34:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:34:12,557 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:12,557 INFO L353 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-07-23 15:34:12,557 INFO L414 AbstractCegarLoop]: === Iteration 157 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash 224155616, now seen corresponding path program 156 times [2018-07-23 15:34:12,557 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:13,313 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:13,313 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:34:13,313 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:34:13,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:34:13,315 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:34:13,316 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-07-23 15:34:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:13,468 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:34:13,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:34:13,468 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-07-23 15:34:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:13,469 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:34:13,469 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:34:13,470 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:34:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:34:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:34:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:34:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:34:13,472 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-07-23 15:34:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:13,473 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:34:13,473 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:34:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:34:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:34:13,473 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:13,473 INFO L353 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-07-23 15:34:13,473 INFO L414 AbstractCegarLoop]: === Iteration 158 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1641114362, now seen corresponding path program 157 times [2018-07-23 15:34:13,474 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:14,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:14,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:34:14,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:34:14,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:34:14,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:34:14,165 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-07-23 15:34:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:14,448 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-23 15:34:14,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:34:14,449 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-07-23 15:34:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:14,449 INFO L225 Difference]: With dead ends: 164 [2018-07-23 15:34:14,449 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 15:34:14,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:34:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 15:34:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 15:34:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:34:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:34:14,453 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-07-23 15:34:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:14,453 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:34:14,453 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:34:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:34:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:34:14,454 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:14,454 INFO L353 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-07-23 15:34:14,454 INFO L414 AbstractCegarLoop]: === Iteration 159 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash 665058464, now seen corresponding path program 158 times [2018-07-23 15:34:14,454 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:15,074 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:15,074 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:34:15,074 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:34:15,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:34:15,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:34:15,077 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-07-23 15:34:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:15,503 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:34:15,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:34:15,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-07-23 15:34:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:15,503 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:34:15,503 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:34:15,505 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:34:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:34:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:34:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:34:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:34:15,507 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-07-23 15:34:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:15,508 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:34:15,508 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:34:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:34:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:34:15,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:15,509 INFO L353 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-07-23 15:34:15,509 INFO L414 AbstractCegarLoop]: === Iteration 160 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -858027962, now seen corresponding path program 159 times [2018-07-23 15:34:15,509 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:16,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:16,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:34:16,298 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:34:16,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:34:16,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:34:16,301 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-07-23 15:34:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:16,721 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 15:34:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:34:16,721 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-07-23 15:34:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:16,722 INFO L225 Difference]: With dead ends: 166 [2018-07-23 15:34:16,722 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 15:34:16,724 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:34:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 15:34:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 15:34:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:34:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:34:16,727 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-07-23 15:34:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:16,727 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:34:16,728 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:34:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:34:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:34:16,728 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:16,729 INFO L353 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-07-23 15:34:16,729 INFO L414 AbstractCegarLoop]: === Iteration 161 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -829066912, now seen corresponding path program 160 times [2018-07-23 15:34:16,729 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:17,507 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:17,507 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:34:17,507 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:34:17,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:34:17,509 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:34:17,509 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-07-23 15:34:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:17,849 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:34:17,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:34:17,849 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-07-23 15:34:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:17,850 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:34:17,850 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:34:17,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:34:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:34:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:34:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:34:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:34:17,853 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-07-23 15:34:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:17,853 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:34:17,853 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:34:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:34:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:34:17,854 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:17,854 INFO L353 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-07-23 15:34:17,854 INFO L414 AbstractCegarLoop]: === Iteration 162 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 68725638, now seen corresponding path program 161 times [2018-07-23 15:34:17,855 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:18,525 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:18,525 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:34:18,525 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:34:18,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:34:18,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:34:18,528 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-07-23 15:34:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:18,677 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-23 15:34:18,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:34:18,678 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-07-23 15:34:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:18,678 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:34:18,678 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:34:18,681 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:34:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:34:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:34:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:34:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:34:18,684 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-07-23 15:34:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:18,684 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:34:18,684 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:34:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:34:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:34:18,685 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:18,685 INFO L353 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-07-23 15:34:18,685 INFO L414 AbstractCegarLoop]: === Iteration 163 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:18,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2130490912, now seen corresponding path program 162 times [2018-07-23 15:34:18,686 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:19,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:19,651 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:34:19,652 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:34:19,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:34:19,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:34:19,655 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-07-23 15:34:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:20,121 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:34:20,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:34:20,121 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-07-23 15:34:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:20,122 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:34:20,122 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:34:20,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:34:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:34:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:34:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:34:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:34:20,127 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-07-23 15:34:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:20,127 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:34:20,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:34:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:34:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:34:20,127 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:20,127 INFO L353 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-07-23 15:34:20,128 INFO L414 AbstractCegarLoop]: === Iteration 164 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1620704966, now seen corresponding path program 163 times [2018-07-23 15:34:20,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:20,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:20,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:34:20,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:34:20,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:34:20,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:34:20,912 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-07-23 15:34:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:21,420 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-23 15:34:21,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:34:21,420 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-07-23 15:34:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:21,421 INFO L225 Difference]: With dead ends: 170 [2018-07-23 15:34:21,421 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 15:34:21,422 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:34:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 15:34:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 15:34:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:34:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:34:21,424 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-07-23 15:34:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:21,424 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:34:21,424 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:34:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:34:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:34:21,425 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:21,425 INFO L353 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-07-23 15:34:21,425 INFO L414 AbstractCegarLoop]: === Iteration 165 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1297757472, now seen corresponding path program 164 times [2018-07-23 15:34:21,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:22,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:22,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:34:22,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:34:22,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:34:22,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:34:22,143 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-07-23 15:34:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:22,442 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:34:22,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:34:22,442 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-07-23 15:34:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:22,443 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:34:22,443 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:34:22,444 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:34:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:34:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:34:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:34:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:34:22,446 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-07-23 15:34:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:22,446 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:34:22,446 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:34:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:34:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:34:22,447 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:22,447 INFO L353 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-07-23 15:34:22,447 INFO L414 AbstractCegarLoop]: === Iteration 166 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1575779834, now seen corresponding path program 165 times [2018-07-23 15:34:22,447 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:23,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:23,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:34:23,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:34:23,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:34:23,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:34:23,109 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-07-23 15:34:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:23,326 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 15:34:23,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:34:23,326 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-07-23 15:34:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:23,327 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:34:23,327 INFO L226 Difference]: Without dead ends: 170 [2018-07-23 15:34:23,328 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:34:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-23 15:34:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-23 15:34:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:34:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:34:23,331 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-07-23 15:34:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:23,331 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:34:23,332 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:34:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:34:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:34:23,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:23,332 INFO L353 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-07-23 15:34:23,332 INFO L414 AbstractCegarLoop]: === Iteration 167 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1604538464, now seen corresponding path program 166 times [2018-07-23 15:34:23,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:24,017 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:24,018 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:34:24,018 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:34:24,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:34:24,022 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:34:24,022 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-07-23 15:34:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:24,577 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:34:24,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:34:24,577 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-07-23 15:34:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:24,578 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:34:24,578 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:34:24,579 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:34:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:34:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:34:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:34:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:34:24,582 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-07-23 15:34:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:24,582 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:34:24,582 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:34:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:34:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:34:24,582 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:24,582 INFO L353 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-07-23 15:34:24,583 INFO L414 AbstractCegarLoop]: === Iteration 168 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1798911302, now seen corresponding path program 167 times [2018-07-23 15:34:24,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:25,312 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:25,313 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:34:25,313 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:34:25,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:34:25,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:34:25,316 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-07-23 15:34:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:25,664 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-23 15:34:25,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:34:25,665 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-07-23 15:34:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:25,665 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:34:25,665 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:34:25,667 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:34:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:34:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:34:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:34:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:34:25,669 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-07-23 15:34:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:25,669 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:34:25,669 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:34:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:34:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:34:25,670 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:25,670 INFO L353 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-07-23 15:34:25,670 INFO L414 AbstractCegarLoop]: === Iteration 169 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -68328352, now seen corresponding path program 168 times [2018-07-23 15:34:25,670 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:26,397 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:26,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:34:26,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:34:26,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:34:26,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:34:26,400 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-07-23 15:34:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:26,685 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:34:26,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:34:26,685 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-07-23 15:34:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:26,686 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:34:26,686 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:34:26,687 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:34:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:34:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:34:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:34:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:34:26,689 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-07-23 15:34:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:26,689 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:34:26,689 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:34:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:34:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:34:26,690 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:26,690 INFO L353 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-07-23 15:34:26,690 INFO L414 AbstractCegarLoop]: === Iteration 170 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2118182778, now seen corresponding path program 169 times [2018-07-23 15:34:26,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:27,398 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:27,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:34:27,398 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:34:27,400 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:34:27,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:34:27,401 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-07-23 15:34:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:27,921 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-23 15:34:27,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:34:27,921 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-07-23 15:34:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:27,921 INFO L225 Difference]: With dead ends: 176 [2018-07-23 15:34:27,921 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 15:34:27,923 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:34:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 15:34:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 15:34:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:34:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:34:27,925 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-07-23 15:34:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:27,925 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:34:27,925 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:34:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:34:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:34:27,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:27,926 INFO L353 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-07-23 15:34:27,926 INFO L414 AbstractCegarLoop]: === Iteration 171 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:27,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1239160544, now seen corresponding path program 170 times [2018-07-23 15:34:27,926 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:28,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:28,633 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:34:28,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:34:28,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:34:28,637 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:34:28,637 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-07-23 15:34:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:28,809 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:34:28,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:34:28,809 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-07-23 15:34:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:28,809 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:34:28,809 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:34:28,812 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:34:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:34:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:34:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:34:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:34:28,815 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-07-23 15:34:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:28,815 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:34:28,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:34:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:34:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:34:28,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:28,816 INFO L353 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-07-23 15:34:28,816 INFO L414 AbstractCegarLoop]: === Iteration 172 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash 240724934, now seen corresponding path program 171 times [2018-07-23 15:34:28,816 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:29,620 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:29,620 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:34:29,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:34:29,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:34:29,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:34:29,624 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-07-23 15:34:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:30,243 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 15:34:30,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:34:30,243 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-07-23 15:34:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:30,243 INFO L225 Difference]: With dead ends: 178 [2018-07-23 15:34:30,244 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 15:34:30,245 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:34:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 15:34:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 15:34:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:34:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:34:30,248 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-07-23 15:34:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:30,248 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:34:30,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:34:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:34:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:34:30,249 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:30,249 INFO L353 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-07-23 15:34:30,249 INFO L414 AbstractCegarLoop]: === Iteration 173 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1127465504, now seen corresponding path program 172 times [2018-07-23 15:34:30,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:31,000 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:31,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:34:31,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:34:31,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:34:31,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:34:31,004 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-07-23 15:34:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:31,313 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:34:31,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:34:31,313 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-07-23 15:34:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:31,314 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:34:31,314 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:34:31,316 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:34:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:34:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:34:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:34:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:34:31,319 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-07-23 15:34:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:31,319 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:34:31,320 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:34:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:34:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:34:31,320 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:31,321 INFO L353 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-07-23 15:34:31,321 INFO L414 AbstractCegarLoop]: === Iteration 174 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash -591696122, now seen corresponding path program 173 times [2018-07-23 15:34:31,321 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:32,120 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:32,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:34:32,120 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:34:32,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:34:32,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:34:32,124 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 176 states. [2018-07-23 15:34:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:32,734 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-23 15:34:32,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:34:32,734 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 176 [2018-07-23 15:34:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:32,734 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:34:32,734 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:34:32,736 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:34:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:34:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:34:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:34:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:34:32,738 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-07-23 15:34:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:32,739 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:34:32,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:34:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:34:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:34:32,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:32,739 INFO L353 BasicCegarLoop]: trace histogram [174, 1, 1, 1] [2018-07-23 15:34:32,739 INFO L414 AbstractCegarLoop]: === Iteration 175 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:32,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1162714464, now seen corresponding path program 174 times [2018-07-23 15:34:32,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:33,564 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:33,564 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:34:33,564 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:34:33,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:34:33,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:34:33,568 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 177 states. [2018-07-23 15:34:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:34,002 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:34:34,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:34:34,002 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 177 [2018-07-23 15:34:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:34,002 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:34:34,002 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:34:34,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:34:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:34:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:34:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:34:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:34:34,008 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 177 [2018-07-23 15:34:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:34,008 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:34:34,008 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:34:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:34:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:34:34,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:34,009 INFO L353 BasicCegarLoop]: trace histogram [175, 1, 1, 1] [2018-07-23 15:34:34,009 INFO L414 AbstractCegarLoop]: === Iteration 176 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1684413882, now seen corresponding path program 175 times [2018-07-23 15:34:34,009 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:34,966 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:34,966 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:34:34,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:34:34,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:34:34,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:34:34,970 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 178 states. [2018-07-23 15:34:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:35,538 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-23 15:34:35,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:34:35,538 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-07-23 15:34:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:35,539 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:34:35,539 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 15:34:35,540 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:34:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 15:34:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 15:34:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:34:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:34:35,542 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 178 [2018-07-23 15:34:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:35,543 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:34:35,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:34:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:34:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:34:35,543 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:35,543 INFO L353 BasicCegarLoop]: trace histogram [176, 1, 1, 1] [2018-07-23 15:34:35,543 INFO L414 AbstractCegarLoop]: === Iteration 177 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -677226656, now seen corresponding path program 176 times [2018-07-23 15:34:35,544 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:36,424 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:36,424 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:34:36,424 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:34:36,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:34:36,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:34:36,428 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 179 states. [2018-07-23 15:34:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:36,799 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:34:36,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:34:36,799 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 179 [2018-07-23 15:34:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:36,800 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:34:36,800 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:34:36,802 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:34:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:34:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:34:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:34:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:34:36,804 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 179 [2018-07-23 15:34:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:36,804 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:34:36,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:34:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:34:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:34:36,805 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:36,805 INFO L353 BasicCegarLoop]: trace histogram [177, 1, 1, 1] [2018-07-23 15:34:36,805 INFO L414 AbstractCegarLoop]: === Iteration 178 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 480806278, now seen corresponding path program 177 times [2018-07-23 15:34:36,806 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:37,785 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:37,785 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:34:37,785 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:34:37,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:34:37,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:34:37,789 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 180 states. [2018-07-23 15:34:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:38,556 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 15:34:38,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:34:38,556 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 180 [2018-07-23 15:34:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:38,557 INFO L225 Difference]: With dead ends: 184 [2018-07-23 15:34:38,557 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 15:34:38,560 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:34:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 15:34:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-23 15:34:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:34:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:34:38,564 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 180 [2018-07-23 15:34:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:38,564 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:34:38,564 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:34:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:34:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:34:38,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:38,565 INFO L353 BasicCegarLoop]: trace histogram [178, 1, 1, 1] [2018-07-23 15:34:38,565 INFO L414 AbstractCegarLoop]: === Iteration 179 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2020088864, now seen corresponding path program 178 times [2018-07-23 15:34:38,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:39,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:39,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [180] total 180 [2018-07-23 15:34:39,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-07-23 15:34:39,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-07-23 15:34:39,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:34:39,621 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 181 states. [2018-07-23 15:34:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:39,851 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:34:39,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2018-07-23 15:34:39,851 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 181 [2018-07-23 15:34:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:39,852 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:34:39,852 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:34:39,853 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16290, Invalid=16290, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:34:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:34:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:34:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:34:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:34:39,855 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 181 [2018-07-23 15:34:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:39,856 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:34:39,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-07-23 15:34:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:34:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:34:39,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:39,857 INFO L353 BasicCegarLoop]: trace histogram [179, 1, 1, 1] [2018-07-23 15:34:39,857 INFO L414 AbstractCegarLoop]: === Iteration 180 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:39,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1801758522, now seen corresponding path program 179 times [2018-07-23 15:34:39,857 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:40,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:40,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [181] total 181 [2018-07-23 15:34:40,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-07-23 15:34:40,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-07-23 15:34:40,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:34:40,852 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 182 states. [2018-07-23 15:34:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:41,642 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-07-23 15:34:41,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2018-07-23 15:34:41,642 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 182 [2018-07-23 15:34:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:41,643 INFO L225 Difference]: With dead ends: 186 [2018-07-23 15:34:41,643 INFO L226 Difference]: Without dead ends: 184 [2018-07-23 15:34:41,646 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16471, Invalid=16471, Unknown=0, NotChecked=0, Total=32942 [2018-07-23 15:34:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-07-23 15:34:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-07-23 15:34:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 15:34:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-07-23 15:34:41,649 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 182 [2018-07-23 15:34:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:41,649 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-07-23 15:34:41,649 INFO L472 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-07-23 15:34:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-07-23 15:34:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 15:34:41,649 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:41,649 INFO L353 BasicCegarLoop]: trace histogram [180, 1, 1, 1] [2018-07-23 15:34:41,650 INFO L414 AbstractCegarLoop]: === Iteration 181 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash -19943200, now seen corresponding path program 180 times [2018-07-23 15:34:41,650 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:42,622 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:42,622 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [182] total 182 [2018-07-23 15:34:42,622 INFO L450 AbstractCegarLoop]: Interpolant automaton has 183 states [2018-07-23 15:34:42,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2018-07-23 15:34:42,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:34:42,627 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 183 states. [2018-07-23 15:34:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:42,951 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:34:42,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-07-23 15:34:42,951 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 183 [2018-07-23 15:34:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:42,952 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:34:42,952 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:34:42,955 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16653, Invalid=16653, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:34:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:34:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:34:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:34:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:34:42,959 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 183 [2018-07-23 15:34:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:42,959 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:34:42,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 183 states. [2018-07-23 15:34:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:34:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:34:42,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:42,960 INFO L353 BasicCegarLoop]: trace histogram [181, 1, 1, 1] [2018-07-23 15:34:42,960 INFO L414 AbstractCegarLoop]: === Iteration 182 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -618243066, now seen corresponding path program 181 times [2018-07-23 15:34:42,961 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:44,082 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:44,082 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [183] total 183 [2018-07-23 15:34:44,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-07-23 15:34:44,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-07-23 15:34:44,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:34:44,087 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 184 states. [2018-07-23 15:34:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:44,590 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-07-23 15:34:44,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2018-07-23 15:34:44,590 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 184 [2018-07-23 15:34:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:44,591 INFO L225 Difference]: With dead ends: 188 [2018-07-23 15:34:44,591 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 15:34:44,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16836, Invalid=16836, Unknown=0, NotChecked=0, Total=33672 [2018-07-23 15:34:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 15:34:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-23 15:34:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 15:34:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-07-23 15:34:44,596 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 184 [2018-07-23 15:34:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:44,596 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-07-23 15:34:44,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-07-23 15:34:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-07-23 15:34:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 15:34:44,596 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:44,596 INFO L353 BasicCegarLoop]: trace histogram [182, 1, 1, 1] [2018-07-23 15:34:44,596 INFO L414 AbstractCegarLoop]: === Iteration 183 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:44,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1985669728, now seen corresponding path program 182 times [2018-07-23 15:34:44,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:45,643 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:45,643 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [184] total 184 [2018-07-23 15:34:45,643 INFO L450 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-07-23 15:34:45,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-07-23 15:34:45,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:34:45,649 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 185 states. [2018-07-23 15:34:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:46,486 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:34:46,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2018-07-23 15:34:46,487 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 185 [2018-07-23 15:34:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:46,487 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:34:46,487 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:34:46,489 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17020, Invalid=17020, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:34:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:34:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:34:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:34:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-23 15:34:46,492 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 185 [2018-07-23 15:34:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:46,492 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-23 15:34:46,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-07-23 15:34:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-23 15:34:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:34:46,492 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:46,492 INFO L353 BasicCegarLoop]: trace histogram [183, 1, 1, 1] [2018-07-23 15:34:46,493 INFO L414 AbstractCegarLoop]: === Iteration 184 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1426223290, now seen corresponding path program 183 times [2018-07-23 15:34:46,493 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:47,582 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:47,582 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [185] total 185 [2018-07-23 15:34:47,582 INFO L450 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-07-23 15:34:47,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-07-23 15:34:47,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:34:47,587 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 186 states. [2018-07-23 15:34:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:47,886 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-23 15:34:47,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-07-23 15:34:47,886 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 186 [2018-07-23 15:34:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:47,887 INFO L225 Difference]: With dead ends: 190 [2018-07-23 15:34:47,887 INFO L226 Difference]: Without dead ends: 188 [2018-07-23 15:34:47,890 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17205, Invalid=17205, Unknown=0, NotChecked=0, Total=34410 [2018-07-23 15:34:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-23 15:34:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-07-23 15:34:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 15:34:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 15:34:47,893 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 186 [2018-07-23 15:34:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:47,893 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 15:34:47,893 INFO L472 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-07-23 15:34:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 15:34:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 15:34:47,894 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:47,894 INFO L353 BasicCegarLoop]: trace histogram [184, 1, 1, 1] [2018-07-23 15:34:47,894 INFO L414 AbstractCegarLoop]: === Iteration 185 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1263252896, now seen corresponding path program 184 times [2018-07-23 15:34:47,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:49,029 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:49,029 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [186] total 186 [2018-07-23 15:34:49,029 INFO L450 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-07-23 15:34:49,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-07-23 15:34:49,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:34:49,031 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 187 states. [2018-07-23 15:34:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:49,715 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:34:49,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-07-23 15:34:49,715 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 187 [2018-07-23 15:34:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:49,715 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:34:49,715 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:34:49,717 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17391, Invalid=17391, Unknown=0, NotChecked=0, Total=34782 [2018-07-23 15:34:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:34:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:34:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:34:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-23 15:34:49,719 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 187 [2018-07-23 15:34:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:49,720 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-23 15:34:49,720 INFO L472 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-07-23 15:34:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-23 15:34:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:34:49,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:49,720 INFO L353 BasicCegarLoop]: trace histogram [185, 1, 1, 1] [2018-07-23 15:34:49,720 INFO L414 AbstractCegarLoop]: === Iteration 186 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash -506137978, now seen corresponding path program 185 times [2018-07-23 15:34:49,721 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:50,752 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:50,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [187] total 187 [2018-07-23 15:34:50,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-07-23 15:34:50,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-07-23 15:34:50,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:34:50,756 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 188 states. [2018-07-23 15:34:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:51,731 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-07-23 15:34:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2018-07-23 15:34:51,731 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 188 [2018-07-23 15:34:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:51,732 INFO L225 Difference]: With dead ends: 192 [2018-07-23 15:34:51,732 INFO L226 Difference]: Without dead ends: 190 [2018-07-23 15:34:51,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17578, Invalid=17578, Unknown=0, NotChecked=0, Total=35156 [2018-07-23 15:34:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-23 15:34:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-07-23 15:34:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 15:34:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-07-23 15:34:51,736 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 188 [2018-07-23 15:34:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:51,736 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-07-23 15:34:51,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-07-23 15:34:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-07-23 15:34:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 15:34:51,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:51,737 INFO L353 BasicCegarLoop]: trace histogram [186, 1, 1, 1] [2018-07-23 15:34:51,737 INFO L414 AbstractCegarLoop]: === Iteration 187 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1489588000, now seen corresponding path program 186 times [2018-07-23 15:34:51,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:52,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:52,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [188] total 188 [2018-07-23 15:34:52,699 INFO L450 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-07-23 15:34:52,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-07-23 15:34:52,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:34:52,703 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 189 states. [2018-07-23 15:34:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:53,091 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 15:34:53,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-07-23 15:34:53,091 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 189 [2018-07-23 15:34:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:53,091 INFO L225 Difference]: With dead ends: 193 [2018-07-23 15:34:53,091 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 15:34:53,093 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2018-07-23 15:34:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 15:34:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 15:34:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 15:34:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 15:34:53,095 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 189 [2018-07-23 15:34:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:53,095 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 15:34:53,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-07-23 15:34:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 15:34:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 15:34:53,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:53,096 INFO L353 BasicCegarLoop]: trace histogram [187, 1, 1, 1] [2018-07-23 15:34:53,096 INFO L414 AbstractCegarLoop]: === Iteration 188 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1067416122, now seen corresponding path program 187 times [2018-07-23 15:34:53,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:53,984 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:53,985 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [189] total 189 [2018-07-23 15:34:53,985 INFO L450 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-07-23 15:34:53,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-07-23 15:34:53,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:34:53,987 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 190 states. [2018-07-23 15:34:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:54,269 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-07-23 15:34:54,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-23 15:34:54,269 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 190 [2018-07-23 15:34:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:54,269 INFO L225 Difference]: With dead ends: 194 [2018-07-23 15:34:54,270 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 15:34:54,271 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17955, Invalid=17955, Unknown=0, NotChecked=0, Total=35910 [2018-07-23 15:34:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 15:34:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-23 15:34:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 15:34:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-07-23 15:34:54,273 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 190 [2018-07-23 15:34:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:54,274 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-07-23 15:34:54,274 INFO L472 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-07-23 15:34:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-07-23 15:34:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 15:34:54,275 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:54,275 INFO L353 BasicCegarLoop]: trace histogram [188, 1, 1, 1] [2018-07-23 15:34:54,275 INFO L414 AbstractCegarLoop]: === Iteration 189 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1269834720, now seen corresponding path program 188 times [2018-07-23 15:34:54,275 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:55,143 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:55,143 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [190] total 190 [2018-07-23 15:34:55,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-07-23 15:34:55,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-07-23 15:34:55,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:34:55,146 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 191 states. [2018-07-23 15:34:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:55,887 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-07-23 15:34:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-07-23 15:34:55,887 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 191 [2018-07-23 15:34:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:55,887 INFO L225 Difference]: With dead ends: 195 [2018-07-23 15:34:55,888 INFO L226 Difference]: Without dead ends: 193 [2018-07-23 15:34:55,891 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18145, Invalid=18145, Unknown=0, NotChecked=0, Total=36290 [2018-07-23 15:34:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-07-23 15:34:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-07-23 15:34:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-07-23 15:34:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-07-23 15:34:55,894 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 191 [2018-07-23 15:34:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:55,894 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-07-23 15:34:55,894 INFO L472 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-07-23 15:34:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-07-23 15:34:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-23 15:34:55,895 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:55,895 INFO L353 BasicCegarLoop]: trace histogram [189, 1, 1, 1] [2018-07-23 15:34:55,895 INFO L414 AbstractCegarLoop]: === Iteration 190 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 710166790, now seen corresponding path program 189 times [2018-07-23 15:34:55,896 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:57,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:57,006 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [191] total 191 [2018-07-23 15:34:57,006 INFO L450 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-07-23 15:34:57,008 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-07-23 15:34:57,010 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:34:57,010 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 192 states. [2018-07-23 15:34:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:57,858 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-23 15:34:57,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-07-23 15:34:57,858 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 192 [2018-07-23 15:34:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:57,859 INFO L225 Difference]: With dead ends: 196 [2018-07-23 15:34:57,859 INFO L226 Difference]: Without dead ends: 194 [2018-07-23 15:34:57,862 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2018-07-23 15:34:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-07-23 15:34:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-07-23 15:34:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 15:34:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 15:34:57,866 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 192 [2018-07-23 15:34:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:57,866 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 15:34:57,866 INFO L472 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-07-23 15:34:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 15:34:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 15:34:57,867 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:57,867 INFO L353 BasicCegarLoop]: trace histogram [190, 1, 1, 1] [2018-07-23 15:34:57,867 INFO L414 AbstractCegarLoop]: === Iteration 191 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 540330144, now seen corresponding path program 190 times [2018-07-23 15:34:57,868 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:58,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:58,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [192] total 192 [2018-07-23 15:34:58,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-07-23 15:34:58,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-07-23 15:34:58,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:34:58,781 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 193 states. [2018-07-23 15:34:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:59,310 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-07-23 15:34:59,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-07-23 15:34:59,310 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 193 [2018-07-23 15:34:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:59,310 INFO L225 Difference]: With dead ends: 197 [2018-07-23 15:34:59,311 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 15:34:59,312 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-07-23 15:34:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 15:34:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-07-23 15:34:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-07-23 15:34:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-07-23 15:34:59,314 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 193 [2018-07-23 15:34:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:59,314 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-07-23 15:34:59,314 INFO L472 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-07-23 15:34:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-07-23 15:34:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-23 15:34:59,315 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:59,315 INFO L353 BasicCegarLoop]: trace histogram [191, 1, 1, 1] [2018-07-23 15:34:59,315 INFO L414 AbstractCegarLoop]: === Iteration 192 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash -429638586, now seen corresponding path program 191 times [2018-07-23 15:34:59,315 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:00,212 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:00,212 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [193] total 193 [2018-07-23 15:35:00,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-07-23 15:35:00,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-07-23 15:35:00,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:35:00,217 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 194 states. [2018-07-23 15:35:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:00,470 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-07-23 15:35:00,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-07-23 15:35:00,470 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 194 [2018-07-23 15:35:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:00,470 INFO L225 Difference]: With dead ends: 198 [2018-07-23 15:35:00,471 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 15:35:00,473 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18721, Invalid=18721, Unknown=0, NotChecked=0, Total=37442 [2018-07-23 15:35:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 15:35:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-07-23 15:35:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 15:35:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-07-23 15:35:00,475 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 194 [2018-07-23 15:35:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:00,476 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-07-23 15:35:00,476 INFO L472 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-07-23 15:35:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-07-23 15:35:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 15:35:00,477 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:00,477 INFO L353 BasicCegarLoop]: trace histogram [192, 1, 1, 1] [2018-07-23 15:35:00,477 INFO L414 AbstractCegarLoop]: === Iteration 193 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash -433898144, now seen corresponding path program 192 times [2018-07-23 15:35:00,477 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:01,400 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:01,400 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194] total 194 [2018-07-23 15:35:01,400 INFO L450 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-07-23 15:35:01,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-07-23 15:35:01,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:35:01,404 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 195 states. [2018-07-23 15:35:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:01,763 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 15:35:01,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-07-23 15:35:01,763 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 195 [2018-07-23 15:35:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:01,763 INFO L225 Difference]: With dead ends: 199 [2018-07-23 15:35:01,764 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 15:35:01,765 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18915, Invalid=18915, Unknown=0, NotChecked=0, Total=37830 [2018-07-23 15:35:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 15:35:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-07-23 15:35:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 15:35:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 15:35:01,768 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 195 [2018-07-23 15:35:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:01,768 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 15:35:01,768 INFO L472 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-07-23 15:35:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 15:35:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 15:35:01,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:01,769 INFO L353 BasicCegarLoop]: trace histogram [193, 1, 1, 1] [2018-07-23 15:35:01,769 INFO L414 AbstractCegarLoop]: === Iteration 194 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -565944442, now seen corresponding path program 193 times [2018-07-23 15:35:01,769 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:02,730 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:02,730 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195] total 195 [2018-07-23 15:35:02,730 INFO L450 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-07-23 15:35:02,732 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-07-23 15:35:02,733 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:35:02,734 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 196 states. [2018-07-23 15:35:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:03,365 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2018-07-23 15:35:03,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-07-23 15:35:03,365 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 196 [2018-07-23 15:35:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:03,366 INFO L225 Difference]: With dead ends: 200 [2018-07-23 15:35:03,366 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 15:35:03,368 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19110, Invalid=19110, Unknown=0, NotChecked=0, Total=38220 [2018-07-23 15:35:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 15:35:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-23 15:35:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 15:35:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-07-23 15:35:03,371 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 196 [2018-07-23 15:35:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:03,371 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-07-23 15:35:03,371 INFO L472 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-07-23 15:35:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-07-23 15:35:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 15:35:03,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:03,372 INFO L353 BasicCegarLoop]: trace histogram [194, 1, 1, 1] [2018-07-23 15:35:03,372 INFO L414 AbstractCegarLoop]: === Iteration 195 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -364412384, now seen corresponding path program 194 times [2018-07-23 15:35:03,373 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:04,446 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:04,446 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196] total 196 [2018-07-23 15:35:04,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-07-23 15:35:04,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-07-23 15:35:04,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:35:04,450 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2018-07-23 15:35:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:05,314 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-07-23 15:35:05,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-07-23 15:35:05,314 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2018-07-23 15:35:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:05,315 INFO L225 Difference]: With dead ends: 201 [2018-07-23 15:35:05,315 INFO L226 Difference]: Without dead ends: 199 [2018-07-23 15:35:05,317 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2018-07-23 15:35:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-07-23 15:35:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-07-23 15:35:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-07-23 15:35:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-07-23 15:35:05,319 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 197 [2018-07-23 15:35:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:05,319 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-07-23 15:35:05,319 INFO L472 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-07-23 15:35:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-07-23 15:35:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-07-23 15:35:05,320 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:05,320 INFO L353 BasicCegarLoop]: trace histogram [195, 1, 1, 1] [2018-07-23 15:35:05,320 INFO L414 AbstractCegarLoop]: === Iteration 196 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:05,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1588114118, now seen corresponding path program 195 times [2018-07-23 15:35:05,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:06,315 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:06,315 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197] total 197 [2018-07-23 15:35:06,316 INFO L450 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-07-23 15:35:06,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-07-23 15:35:06,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:35:06,318 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 198 states. [2018-07-23 15:35:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:07,198 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-23 15:35:07,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-07-23 15:35:07,198 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 198 [2018-07-23 15:35:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:07,198 INFO L225 Difference]: With dead ends: 202 [2018-07-23 15:35:07,198 INFO L226 Difference]: Without dead ends: 200 [2018-07-23 15:35:07,199 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19503, Invalid=19503, Unknown=0, NotChecked=0, Total=39006 [2018-07-23 15:35:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-23 15:35:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-07-23 15:35:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 15:35:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 15:35:07,202 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 198 [2018-07-23 15:35:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:07,202 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 15:35:07,202 INFO L472 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-07-23 15:35:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 15:35:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 15:35:07,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:07,202 INFO L353 BasicCegarLoop]: trace histogram [196, 1, 1, 1] [2018-07-23 15:35:07,203 INFO L414 AbstractCegarLoop]: === Iteration 197 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1986893536, now seen corresponding path program 196 times [2018-07-23 15:35:07,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:08,160 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:08,160 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198] total 198 [2018-07-23 15:35:08,161 INFO L450 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-07-23 15:35:08,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-07-23 15:35:08,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:35:08,165 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 199 states. [2018-07-23 15:35:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:09,135 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-07-23 15:35:09,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-07-23 15:35:09,135 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 199 [2018-07-23 15:35:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:09,136 INFO L225 Difference]: With dead ends: 203 [2018-07-23 15:35:09,136 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 15:35:09,140 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2018-07-23 15:35:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 15:35:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-07-23 15:35:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-07-23 15:35:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-07-23 15:35:09,143 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 199 [2018-07-23 15:35:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:09,143 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-07-23 15:35:09,143 INFO L472 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-07-23 15:35:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-07-23 15:35:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-23 15:35:09,144 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:09,144 INFO L353 BasicCegarLoop]: trace histogram [197, 1, 1, 1] [2018-07-23 15:35:09,144 INFO L414 AbstractCegarLoop]: === Iteration 198 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1464153606, now seen corresponding path program 197 times [2018-07-23 15:35:09,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:10,244 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:10,244 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [199] total 199 [2018-07-23 15:35:10,244 INFO L450 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-07-23 15:35:10,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-07-23 15:35:10,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:35:10,248 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 200 states. [2018-07-23 15:35:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:11,144 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-07-23 15:35:11,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2018-07-23 15:35:11,144 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 200 [2018-07-23 15:35:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:11,145 INFO L225 Difference]: With dead ends: 204 [2018-07-23 15:35:11,145 INFO L226 Difference]: Without dead ends: 202 [2018-07-23 15:35:11,147 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19900, Invalid=19900, Unknown=0, NotChecked=0, Total=39800 [2018-07-23 15:35:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-07-23 15:35:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-07-23 15:35:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 15:35:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-07-23 15:35:11,149 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 200 [2018-07-23 15:35:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:11,150 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-07-23 15:35:11,150 INFO L472 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-07-23 15:35:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-07-23 15:35:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 15:35:11,150 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:11,150 INFO L353 BasicCegarLoop]: trace histogram [198, 1, 1, 1] [2018-07-23 15:35:11,150 INFO L414 AbstractCegarLoop]: === Iteration 199 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1855882336, now seen corresponding path program 198 times [2018-07-23 15:35:11,151 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:12,155 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:12,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [200] total 200 [2018-07-23 15:35:12,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-07-23 15:35:12,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-07-23 15:35:12,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:35:12,159 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 201 states. [2018-07-23 15:35:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:12,951 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 15:35:12,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-07-23 15:35:12,951 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 201 [2018-07-23 15:35:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:12,952 INFO L225 Difference]: With dead ends: 205 [2018-07-23 15:35:12,952 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 15:35:12,954 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2018-07-23 15:35:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 15:35:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 15:35:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 15:35:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 15:35:12,956 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 201 [2018-07-23 15:35:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:12,956 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 15:35:12,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-07-23 15:35:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 15:35:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 15:35:12,957 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:12,957 INFO L353 BasicCegarLoop]: trace histogram [199, 1, 1, 1] [2018-07-23 15:35:12,957 INFO L414 AbstractCegarLoop]: === Iteration 200 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1697781434, now seen corresponding path program 199 times [2018-07-23 15:35:12,957 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:13,966 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:13,966 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [201] total 201 [2018-07-23 15:35:13,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-07-23 15:35:13,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-07-23 15:35:13,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:35:13,970 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 202 states. [2018-07-23 15:35:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:14,739 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-07-23 15:35:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-07-23 15:35:14,739 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 202 [2018-07-23 15:35:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:14,740 INFO L225 Difference]: With dead ends: 206 [2018-07-23 15:35:14,740 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 15:35:14,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20301, Invalid=20301, Unknown=0, NotChecked=0, Total=40602 [2018-07-23 15:35:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 15:35:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-07-23 15:35:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 15:35:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-07-23 15:35:14,744 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 202 [2018-07-23 15:35:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:14,744 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-07-23 15:35:14,744 INFO L472 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-07-23 15:35:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-07-23 15:35:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 15:35:14,745 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:14,745 INFO L353 BasicCegarLoop]: trace histogram [200, 1, 1, 1] [2018-07-23 15:35:14,745 INFO L414 AbstractCegarLoop]: === Iteration 201 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1091620768, now seen corresponding path program 200 times [2018-07-23 15:35:14,745 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:15,780 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:15,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2018-07-23 15:35:15,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 203 states [2018-07-23 15:35:15,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2018-07-23 15:35:15,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:35:15,784 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 203 states. [2018-07-23 15:35:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:16,527 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-07-23 15:35:16,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2018-07-23 15:35:16,527 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 203 [2018-07-23 15:35:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:16,527 INFO L225 Difference]: With dead ends: 207 [2018-07-23 15:35:16,527 INFO L226 Difference]: Without dead ends: 205 [2018-07-23 15:35:16,528 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2018-07-23 15:35:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-07-23 15:35:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-07-23 15:35:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-07-23 15:35:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-07-23 15:35:16,531 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 203 [2018-07-23 15:35:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:16,531 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-07-23 15:35:16,531 INFO L472 AbstractCegarLoop]: Interpolant automaton has 203 states. [2018-07-23 15:35:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-07-23 15:35:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-23 15:35:16,531 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:16,531 INFO L353 BasicCegarLoop]: trace histogram [201, 1, 1, 1] [2018-07-23 15:35:16,532 INFO L414 AbstractCegarLoop]: === Iteration 202 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 519490694, now seen corresponding path program 201 times [2018-07-23 15:35:16,532 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:17,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:17,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [203] total 203 [2018-07-23 15:35:17,559 INFO L450 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-07-23 15:35:17,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-07-23 15:35:17,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:35:17,563 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 204 states. [2018-07-23 15:35:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:18,373 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-07-23 15:35:18,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-07-23 15:35:18,374 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 204 [2018-07-23 15:35:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:18,374 INFO L225 Difference]: With dead ends: 208 [2018-07-23 15:35:18,374 INFO L226 Difference]: Without dead ends: 206 [2018-07-23 15:35:18,376 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20706, Invalid=20706, Unknown=0, NotChecked=0, Total=41412 [2018-07-23 15:35:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-07-23 15:35:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-07-23 15:35:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 15:35:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 15:35:18,378 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 204 [2018-07-23 15:35:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:18,379 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 15:35:18,379 INFO L472 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-07-23 15:35:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 15:35:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 15:35:18,379 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:18,379 INFO L353 BasicCegarLoop]: trace histogram [202, 1, 1, 1] [2018-07-23 15:35:18,379 INFO L414 AbstractCegarLoop]: === Iteration 203 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1075661536, now seen corresponding path program 202 times [2018-07-23 15:35:18,380 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20503 backedges. 0 proven. 20503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:19,434 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:19,434 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [204] total 204 [2018-07-23 15:35:19,434 INFO L450 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-07-23 15:35:19,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-07-23 15:35:19,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:35:19,438 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 205 states. [2018-07-23 15:35:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:20,342 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-07-23 15:35:20,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2018-07-23 15:35:20,343 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 205 [2018-07-23 15:35:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:20,343 INFO L225 Difference]: With dead ends: 209 [2018-07-23 15:35:20,343 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 15:35:20,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20910, Invalid=20910, Unknown=0, NotChecked=0, Total=41820 [2018-07-23 15:35:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 15:35:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-07-23 15:35:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-07-23 15:35:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-07-23 15:35:20,348 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 205 [2018-07-23 15:35:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:20,348 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-07-23 15:35:20,348 INFO L472 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-07-23 15:35:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-07-23 15:35:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-23 15:35:20,349 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:20,349 INFO L353 BasicCegarLoop]: trace histogram [203, 1, 1, 1] [2018-07-23 15:35:20,349 INFO L414 AbstractCegarLoop]: === Iteration 204 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1014226886, now seen corresponding path program 203 times [2018-07-23 15:35:20,349 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:21,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:21,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [205] total 205 [2018-07-23 15:35:21,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-07-23 15:35:21,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-07-23 15:35:21,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:35:21,427 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 206 states. [2018-07-23 15:35:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:22,454 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2018-07-23 15:35:22,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-07-23 15:35:22,454 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 206 [2018-07-23 15:35:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:22,455 INFO L225 Difference]: With dead ends: 210 [2018-07-23 15:35:22,455 INFO L226 Difference]: Without dead ends: 208 [2018-07-23 15:35:22,457 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21115, Invalid=21115, Unknown=0, NotChecked=0, Total=42230 [2018-07-23 15:35:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-07-23 15:35:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-07-23 15:35:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 15:35:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-07-23 15:35:22,461 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 206 [2018-07-23 15:35:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:22,461 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-07-23 15:35:22,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-07-23 15:35:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-07-23 15:35:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 15:35:22,462 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:22,462 INFO L353 BasicCegarLoop]: trace histogram [204, 1, 1, 1] [2018-07-23 15:35:22,462 INFO L414 AbstractCegarLoop]: === Iteration 205 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1376258528, now seen corresponding path program 204 times [2018-07-23 15:35:22,463 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20910 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:23,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:23,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [206] total 206 [2018-07-23 15:35:23,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 207 states [2018-07-23 15:35:23,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2018-07-23 15:35:23,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:35:23,564 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 207 states. [2018-07-23 15:35:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:24,716 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 15:35:24,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-07-23 15:35:24,717 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 207 [2018-07-23 15:35:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:24,717 INFO L225 Difference]: With dead ends: 211 [2018-07-23 15:35:24,717 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 15:35:24,720 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21321, Invalid=21321, Unknown=0, NotChecked=0, Total=42642 [2018-07-23 15:35:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 15:35:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-07-23 15:35:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 15:35:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 15:35:24,722 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 207 [2018-07-23 15:35:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:24,722 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 15:35:24,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 207 states. [2018-07-23 15:35:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 15:35:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 15:35:24,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:24,723 INFO L353 BasicCegarLoop]: trace histogram [205, 1, 1, 1] [2018-07-23 15:35:24,723 INFO L414 AbstractCegarLoop]: === Iteration 206 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash -285662458, now seen corresponding path program 205 times [2018-07-23 15:35:24,723 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:25,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:25,850 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [207] total 207 [2018-07-23 15:35:25,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-07-23 15:35:25,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-07-23 15:35:25,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:35:25,854 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 208 states. [2018-07-23 15:35:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:26,963 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-07-23 15:35:26,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-07-23 15:35:26,963 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 208 [2018-07-23 15:35:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:26,963 INFO L225 Difference]: With dead ends: 212 [2018-07-23 15:35:26,963 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 15:35:26,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=21528, Invalid=21528, Unknown=0, NotChecked=0, Total=43056 [2018-07-23 15:35:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 15:35:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-07-23 15:35:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 15:35:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-07-23 15:35:26,967 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 208 [2018-07-23 15:35:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:26,967 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-07-23 15:35:26,967 INFO L472 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-07-23 15:35:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-07-23 15:35:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 15:35:26,968 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:26,968 INFO L353 BasicCegarLoop]: trace histogram [206, 1, 1, 1] [2018-07-23 15:35:26,968 INFO L414 AbstractCegarLoop]: === Iteration 207 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash -265605472, now seen corresponding path program 206 times [2018-07-23 15:35:26,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21321 backedges. 0 proven. 21321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:28,097 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:28,097 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [208] total 208 [2018-07-23 15:35:28,097 INFO L450 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-07-23 15:35:28,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-07-23 15:35:28,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:35:28,101 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 209 states. [2018-07-23 15:35:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:29,189 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-07-23 15:35:29,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2018-07-23 15:35:29,189 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 209 [2018-07-23 15:35:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:29,190 INFO L225 Difference]: With dead ends: 213 [2018-07-23 15:35:29,190 INFO L226 Difference]: Without dead ends: 211 [2018-07-23 15:35:29,192 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2018-07-23 15:35:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-07-23 15:35:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-07-23 15:35:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-07-23 15:35:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-07-23 15:35:29,195 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 209 [2018-07-23 15:35:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:29,195 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-07-23 15:35:29,195 INFO L472 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-07-23 15:35:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-07-23 15:35:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-23 15:35:29,195 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:29,195 INFO L353 BasicCegarLoop]: trace histogram [207, 1, 1, 1] [2018-07-23 15:35:29,196 INFO L414 AbstractCegarLoop]: === Iteration 208 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash 356161094, now seen corresponding path program 207 times [2018-07-23 15:35:29,196 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:30,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:30,327 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [209] total 209 [2018-07-23 15:35:30,327 INFO L450 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-07-23 15:35:30,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-07-23 15:35:30,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:35:30,331 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 210 states. [2018-07-23 15:35:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:31,134 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-07-23 15:35:31,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-07-23 15:35:31,134 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 210 [2018-07-23 15:35:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:31,135 INFO L225 Difference]: With dead ends: 214 [2018-07-23 15:35:31,135 INFO L226 Difference]: Without dead ends: 212 [2018-07-23 15:35:31,137 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21945, Invalid=21945, Unknown=0, NotChecked=0, Total=43890 [2018-07-23 15:35:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-07-23 15:35:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-07-23 15:35:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 15:35:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 15:35:31,140 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 210 [2018-07-23 15:35:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:31,141 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 15:35:31,141 INFO L472 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-07-23 15:35:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 15:35:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 15:35:31,142 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:31,142 INFO L353 BasicCegarLoop]: trace histogram [208, 1, 1, 1] [2018-07-23 15:35:31,142 INFO L414 AbstractCegarLoop]: === Iteration 209 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:31,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1843911840, now seen corresponding path program 208 times [2018-07-23 15:35:31,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21736 backedges. 0 proven. 21736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:32,632 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:32,632 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [210] total 210 [2018-07-23 15:35:32,632 INFO L450 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-07-23 15:35:32,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-07-23 15:35:32,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:35:32,636 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 211 states. [2018-07-23 15:35:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:33,217 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-07-23 15:35:33,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2018-07-23 15:35:33,218 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 211 [2018-07-23 15:35:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:33,218 INFO L225 Difference]: With dead ends: 215 [2018-07-23 15:35:33,218 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 15:35:33,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2018-07-23 15:35:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 15:35:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-07-23 15:35:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-07-23 15:35:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-07-23 15:35:33,223 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 211 [2018-07-23 15:35:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:33,223 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-07-23 15:35:33,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-07-23 15:35:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-07-23 15:35:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-23 15:35:33,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:33,224 INFO L353 BasicCegarLoop]: trace histogram [209, 1, 1, 1] [2018-07-23 15:35:33,224 INFO L414 AbstractCegarLoop]: === Iteration 210 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1326696058, now seen corresponding path program 209 times [2018-07-23 15:35:33,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:34,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:34,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [211] total 211 [2018-07-23 15:35:34,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-07-23 15:35:34,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-07-23 15:35:34,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:35:34,384 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 212 states. [2018-07-23 15:35:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:34,997 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2018-07-23 15:35:34,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2018-07-23 15:35:34,998 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 212 [2018-07-23 15:35:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:34,998 INFO L225 Difference]: With dead ends: 216 [2018-07-23 15:35:34,998 INFO L226 Difference]: Without dead ends: 214 [2018-07-23 15:35:35,001 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22366, Invalid=22366, Unknown=0, NotChecked=0, Total=44732 [2018-07-23 15:35:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-07-23 15:35:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-07-23 15:35:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 15:35:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-07-23 15:35:35,003 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 212 [2018-07-23 15:35:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:35,003 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-07-23 15:35:35,003 INFO L472 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-07-23 15:35:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-07-23 15:35:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 15:35:35,004 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:35,004 INFO L353 BasicCegarLoop]: trace histogram [210, 1, 1, 1] [2018-07-23 15:35:35,004 INFO L414 AbstractCegarLoop]: === Iteration 211 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:35,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1822091296, now seen corresponding path program 210 times [2018-07-23 15:35:35,004 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 22155 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:36,173 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:36,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [212] total 212 [2018-07-23 15:35:36,174 INFO L450 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-07-23 15:35:36,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-07-23 15:35:36,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:35:36,178 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 213 states. [2018-07-23 15:35:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:37,136 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 15:35:37,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-07-23 15:35:37,137 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 213 [2018-07-23 15:35:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:37,137 INFO L225 Difference]: With dead ends: 217 [2018-07-23 15:35:37,137 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 15:35:37,141 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2018-07-23 15:35:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 15:35:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-07-23 15:35:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 15:35:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 15:35:37,144 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 213 [2018-07-23 15:35:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:37,144 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 15:35:37,144 INFO L472 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-07-23 15:35:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 15:35:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 15:35:37,145 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:37,145 INFO L353 BasicCegarLoop]: trace histogram [211, 1, 1, 1] [2018-07-23 15:35:37,145 INFO L414 AbstractCegarLoop]: === Iteration 212 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:37,146 INFO L82 PathProgramCache]: Analyzing trace with hash 650251462, now seen corresponding path program 211 times [2018-07-23 15:35:37,146 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:38,325 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:38,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [213] total 213 [2018-07-23 15:35:38,325 INFO L450 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-07-23 15:35:38,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-07-23 15:35:38,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:35:38,331 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 214 states. [2018-07-23 15:35:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:39,649 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-07-23 15:35:39,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2018-07-23 15:35:39,649 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 214 [2018-07-23 15:35:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:39,650 INFO L225 Difference]: With dead ends: 218 [2018-07-23 15:35:39,650 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 15:35:39,653 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22791, Invalid=22791, Unknown=0, NotChecked=0, Total=45582 [2018-07-23 15:35:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 15:35:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-07-23 15:35:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 15:35:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-07-23 15:35:39,655 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 214 [2018-07-23 15:35:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:39,656 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-07-23 15:35:39,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-07-23 15:35:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-07-23 15:35:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 15:35:39,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:39,656 INFO L353 BasicCegarLoop]: trace histogram [212, 1, 1, 1] [2018-07-23 15:35:39,656 INFO L414 AbstractCegarLoop]: === Iteration 213 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1317045024, now seen corresponding path program 212 times [2018-07-23 15:35:39,657 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22578 backedges. 0 proven. 22578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:40,963 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:40,963 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [214] total 214 [2018-07-23 15:35:40,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 215 states [2018-07-23 15:35:40,965 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2018-07-23 15:35:40,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:35:40,967 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 215 states. [2018-07-23 15:35:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:41,901 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-07-23 15:35:41,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-07-23 15:35:41,901 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 215 [2018-07-23 15:35:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:41,902 INFO L225 Difference]: With dead ends: 219 [2018-07-23 15:35:41,902 INFO L226 Difference]: Without dead ends: 217 [2018-07-23 15:35:41,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23005, Invalid=23005, Unknown=0, NotChecked=0, Total=46010 [2018-07-23 15:35:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-07-23 15:35:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-07-23 15:35:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 15:35:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-07-23 15:35:41,907 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 215 [2018-07-23 15:35:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:41,907 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-07-23 15:35:41,907 INFO L472 AbstractCegarLoop]: Interpolant automaton has 215 states. [2018-07-23 15:35:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-07-23 15:35:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-07-23 15:35:41,908 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:41,908 INFO L353 BasicCegarLoop]: trace histogram [213, 1, 1, 1] [2018-07-23 15:35:41,908 INFO L414 AbstractCegarLoop]: === Iteration 214 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2121273350, now seen corresponding path program 213 times [2018-07-23 15:35:41,909 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:43,212 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:43,212 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [215] total 215 [2018-07-23 15:35:43,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-07-23 15:35:43,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-07-23 15:35:43,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:35:43,217 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 216 states. [2018-07-23 15:35:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:43,647 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-07-23 15:35:43,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-07-23 15:35:43,648 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 216 [2018-07-23 15:35:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:43,648 INFO L225 Difference]: With dead ends: 220 [2018-07-23 15:35:43,648 INFO L226 Difference]: Without dead ends: 218 [2018-07-23 15:35:43,650 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23220, Invalid=23220, Unknown=0, NotChecked=0, Total=46440 [2018-07-23 15:35:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-07-23 15:35:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-07-23 15:35:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 15:35:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 15:35:43,653 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 216 [2018-07-23 15:35:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:43,653 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 15:35:43,653 INFO L472 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-07-23 15:35:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 15:35:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 15:35:43,654 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:43,654 INFO L353 BasicCegarLoop]: trace histogram [214, 1, 1, 1] [2018-07-23 15:35:43,654 INFO L414 AbstractCegarLoop]: === Iteration 215 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1334960544, now seen corresponding path program 214 times [2018-07-23 15:35:43,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23005 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:44,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:44,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [216] total 216 [2018-07-23 15:35:44,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-07-23 15:35:44,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-07-23 15:35:45,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:35:45,001 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 217 states. [2018-07-23 15:35:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:45,883 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-07-23 15:35:45,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2018-07-23 15:35:45,883 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 217 [2018-07-23 15:35:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:45,883 INFO L225 Difference]: With dead ends: 221 [2018-07-23 15:35:45,883 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 15:35:45,885 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23436, Invalid=23436, Unknown=0, NotChecked=0, Total=46872 [2018-07-23 15:35:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 15:35:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-07-23 15:35:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-07-23 15:35:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-07-23 15:35:45,887 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 217 [2018-07-23 15:35:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:45,887 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-07-23 15:35:45,887 INFO L472 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-07-23 15:35:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-07-23 15:35:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-23 15:35:45,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:45,888 INFO L353 BasicCegarLoop]: trace histogram [215, 1, 1, 1] [2018-07-23 15:35:45,888 INFO L414 AbstractCegarLoop]: === Iteration 216 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1565899962, now seen corresponding path program 215 times [2018-07-23 15:35:45,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:47,114 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:47,114 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [217] total 217 [2018-07-23 15:35:47,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-07-23 15:35:47,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-07-23 15:35:47,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:35:47,119 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 218 states. [2018-07-23 15:35:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:48,491 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-07-23 15:35:48,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2018-07-23 15:35:48,491 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 218 [2018-07-23 15:35:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:48,492 INFO L225 Difference]: With dead ends: 222 [2018-07-23 15:35:48,492 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 15:35:48,495 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23653, Invalid=23653, Unknown=0, NotChecked=0, Total=47306 [2018-07-23 15:35:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 15:35:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-07-23 15:35:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 15:35:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-07-23 15:35:48,497 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 218 [2018-07-23 15:35:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:48,497 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-07-23 15:35:48,497 INFO L472 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-07-23 15:35:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-07-23 15:35:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 15:35:48,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:48,498 INFO L353 BasicCegarLoop]: trace histogram [216, 1, 1, 1] [2018-07-23 15:35:48,498 INFO L414 AbstractCegarLoop]: === Iteration 217 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1298262432, now seen corresponding path program 216 times [2018-07-23 15:35:48,498 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23436 backedges. 0 proven. 23436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:49,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:49,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [218] total 218 [2018-07-23 15:35:49,798 INFO L450 AbstractCegarLoop]: Interpolant automaton has 219 states [2018-07-23 15:35:49,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2018-07-23 15:35:49,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:35:49,801 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 219 states. [2018-07-23 15:35:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:50,641 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 15:35:50,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-07-23 15:35:50,641 INFO L78 Accepts]: Start accepts. Automaton has 219 states. Word has length 219 [2018-07-23 15:35:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:50,642 INFO L225 Difference]: With dead ends: 223 [2018-07-23 15:35:50,642 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 15:35:50,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23871, Invalid=23871, Unknown=0, NotChecked=0, Total=47742 [2018-07-23 15:35:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 15:35:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-07-23 15:35:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 15:35:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 15:35:50,645 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 219 [2018-07-23 15:35:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:50,645 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 15:35:50,645 INFO L472 AbstractCegarLoop]: Interpolant automaton has 219 states. [2018-07-23 15:35:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 15:35:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 15:35:50,646 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:50,646 INFO L353 BasicCegarLoop]: trace histogram [217, 1, 1, 1] [2018-07-23 15:35:50,646 INFO L414 AbstractCegarLoop]: === Iteration 218 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1591433594, now seen corresponding path program 217 times [2018-07-23 15:35:50,646 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23653 backedges. 0 proven. 23653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:51,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:51,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [219] total 219 [2018-07-23 15:35:51,995 INFO L450 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-07-23 15:35:51,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-07-23 15:35:52,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:35:52,000 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 220 states. [2018-07-23 15:35:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:52,916 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2018-07-23 15:35:52,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-07-23 15:35:52,916 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 220 [2018-07-23 15:35:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:52,917 INFO L225 Difference]: With dead ends: 224 [2018-07-23 15:35:52,917 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 15:35:52,920 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24090, Invalid=24090, Unknown=0, NotChecked=0, Total=48180 [2018-07-23 15:35:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 15:35:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-07-23 15:35:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 15:35:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-07-23 15:35:52,922 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 220 [2018-07-23 15:35:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:52,923 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-07-23 15:35:52,923 INFO L472 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-07-23 15:35:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-07-23 15:35:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 15:35:52,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:52,923 INFO L353 BasicCegarLoop]: trace histogram [218, 1, 1, 1] [2018-07-23 15:35:52,923 INFO L414 AbstractCegarLoop]: === Iteration 219 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2089805024, now seen corresponding path program 218 times [2018-07-23 15:35:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 23871 backedges. 0 proven. 23871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:54,325 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:54,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [220] total 220 [2018-07-23 15:35:54,325 INFO L450 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-07-23 15:35:54,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-07-23 15:35:54,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:35:54,328 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 221 states. [2018-07-23 15:35:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:55,701 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-07-23 15:35:55,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-23 15:35:55,702 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 221 [2018-07-23 15:35:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:55,702 INFO L225 Difference]: With dead ends: 225 [2018-07-23 15:35:55,702 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 15:35:55,704 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24310, Invalid=24310, Unknown=0, NotChecked=0, Total=48620 [2018-07-23 15:35:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 15:35:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-07-23 15:35:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 15:35:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-07-23 15:35:55,707 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 221 [2018-07-23 15:35:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:55,707 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-07-23 15:35:55,707 INFO L472 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-07-23 15:35:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-07-23 15:35:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-23 15:35:55,708 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:55,708 INFO L353 BasicCegarLoop]: trace histogram [219, 1, 1, 1] [2018-07-23 15:35:55,708 INFO L414 AbstractCegarLoop]: === Iteration 220 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash -359450170, now seen corresponding path program 219 times [2018-07-23 15:35:55,708 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24090 backedges. 0 proven. 24090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:57,207 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:57,208 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [221] total 221 [2018-07-23 15:35:57,208 INFO L450 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-07-23 15:35:57,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-07-23 15:35:57,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:35:57,213 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 222 states. [2018-07-23 15:35:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:35:57,664 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-07-23 15:35:57,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2018-07-23 15:35:57,664 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 222 [2018-07-23 15:35:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:35:57,665 INFO L225 Difference]: With dead ends: 226 [2018-07-23 15:35:57,665 INFO L226 Difference]: Without dead ends: 224 [2018-07-23 15:35:57,667 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24531, Invalid=24531, Unknown=0, NotChecked=0, Total=49062 [2018-07-23 15:35:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-07-23 15:35:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-07-23 15:35:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 15:35:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 15:35:57,671 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 222 [2018-07-23 15:35:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:35:57,671 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 15:35:57,672 INFO L472 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-07-23 15:35:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 15:35:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 15:35:57,672 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:35:57,673 INFO L353 BasicCegarLoop]: trace histogram [220, 1, 1, 1] [2018-07-23 15:35:57,673 INFO L414 AbstractCegarLoop]: === Iteration 221 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:35:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1741942752, now seen corresponding path program 220 times [2018-07-23 15:35:57,673 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:35:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:35:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24310 backedges. 0 proven. 24310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:35:59,181 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:35:59,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [222] total 222 [2018-07-23 15:35:59,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-07-23 15:35:59,183 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-07-23 15:35:59,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:35:59,184 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 223 states. [2018-07-23 15:36:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:00,082 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-07-23 15:36:00,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-07-23 15:36:00,082 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 223 [2018-07-23 15:36:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:00,082 INFO L225 Difference]: With dead ends: 227 [2018-07-23 15:36:00,082 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 15:36:00,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24753, Invalid=24753, Unknown=0, NotChecked=0, Total=49506 [2018-07-23 15:36:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 15:36:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-07-23 15:36:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-07-23 15:36:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-07-23 15:36:00,086 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 223 [2018-07-23 15:36:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:00,086 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-07-23 15:36:00,086 INFO L472 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-07-23 15:36:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-07-23 15:36:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-23 15:36:00,087 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:00,087 INFO L353 BasicCegarLoop]: trace histogram [221, 1, 1, 1] [2018-07-23 15:36:00,087 INFO L414 AbstractCegarLoop]: === Iteration 222 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1834353402, now seen corresponding path program 221 times [2018-07-23 15:36:00,087 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24531 backedges. 0 proven. 24531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:01,409 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:01,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [223] total 223 [2018-07-23 15:36:01,410 INFO L450 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-07-23 15:36:01,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-07-23 15:36:01,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:36:01,415 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 224 states. [2018-07-23 15:36:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:02,828 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-07-23 15:36:02,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2018-07-23 15:36:02,828 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 224 [2018-07-23 15:36:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:02,829 INFO L225 Difference]: With dead ends: 228 [2018-07-23 15:36:02,829 INFO L226 Difference]: Without dead ends: 226 [2018-07-23 15:36:02,831 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24976, Invalid=24976, Unknown=0, NotChecked=0, Total=49952 [2018-07-23 15:36:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-23 15:36:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-07-23 15:36:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 15:36:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-07-23 15:36:02,833 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 224 [2018-07-23 15:36:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:02,834 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-07-23 15:36:02,834 INFO L472 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-07-23 15:36:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-07-23 15:36:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 15:36:02,834 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:02,834 INFO L353 BasicCegarLoop]: trace histogram [222, 1, 1, 1] [2018-07-23 15:36:02,834 INFO L414 AbstractCegarLoop]: === Iteration 223 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1030384480, now seen corresponding path program 222 times [2018-07-23 15:36:02,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24753 backedges. 0 proven. 24753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:04,230 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:04,230 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [224] total 224 [2018-07-23 15:36:04,230 INFO L450 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-07-23 15:36:04,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-07-23 15:36:04,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:36:04,233 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 225 states. [2018-07-23 15:36:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:05,069 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 15:36:05,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2018-07-23 15:36:05,069 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 225 [2018-07-23 15:36:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:05,069 INFO L225 Difference]: With dead ends: 229 [2018-07-23 15:36:05,069 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 15:36:05,071 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25200, Invalid=25200, Unknown=0, NotChecked=0, Total=50400 [2018-07-23 15:36:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 15:36:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-07-23 15:36:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 15:36:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 15:36:05,073 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 225 [2018-07-23 15:36:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:05,073 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 15:36:05,073 INFO L472 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-07-23 15:36:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 15:36:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 15:36:05,074 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:05,074 INFO L353 BasicCegarLoop]: trace histogram [223, 1, 1, 1] [2018-07-23 15:36:05,074 INFO L414 AbstractCegarLoop]: === Iteration 224 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1877151674, now seen corresponding path program 223 times [2018-07-23 15:36:05,074 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24976 backedges. 0 proven. 24976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:06,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:06,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [225] total 225 [2018-07-23 15:36:06,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-07-23 15:36:06,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-07-23 15:36:06,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:36:06,436 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 226 states. [2018-07-23 15:36:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:08,001 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-07-23 15:36:08,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2018-07-23 15:36:08,002 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 226 [2018-07-23 15:36:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:08,002 INFO L225 Difference]: With dead ends: 230 [2018-07-23 15:36:08,002 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 15:36:08,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25425, Invalid=25425, Unknown=0, NotChecked=0, Total=50850 [2018-07-23 15:36:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 15:36:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-07-23 15:36:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 15:36:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-07-23 15:36:08,007 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 226 [2018-07-23 15:36:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:08,007 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-07-23 15:36:08,007 INFO L472 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-07-23 15:36:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-07-23 15:36:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 15:36:08,008 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:08,008 INFO L353 BasicCegarLoop]: trace histogram [224, 1, 1, 1] [2018-07-23 15:36:08,008 INFO L414 AbstractCegarLoop]: === Iteration 225 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1937836384, now seen corresponding path program 224 times [2018-07-23 15:36:08,008 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25200 backedges. 0 proven. 25200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:09,420 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:09,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [226] total 226 [2018-07-23 15:36:09,421 INFO L450 AbstractCegarLoop]: Interpolant automaton has 227 states [2018-07-23 15:36:09,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2018-07-23 15:36:09,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:36:09,423 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 227 states. [2018-07-23 15:36:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:09,832 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-07-23 15:36:09,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2018-07-23 15:36:09,832 INFO L78 Accepts]: Start accepts. Automaton has 227 states. Word has length 227 [2018-07-23 15:36:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:09,832 INFO L225 Difference]: With dead ends: 231 [2018-07-23 15:36:09,832 INFO L226 Difference]: Without dead ends: 229 [2018-07-23 15:36:09,834 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25651, Invalid=25651, Unknown=0, NotChecked=0, Total=51302 [2018-07-23 15:36:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-07-23 15:36:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-07-23 15:36:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-07-23 15:36:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-07-23 15:36:09,836 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 227 [2018-07-23 15:36:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:09,837 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-07-23 15:36:09,837 INFO L472 AbstractCegarLoop]: Interpolant automaton has 227 states. [2018-07-23 15:36:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-07-23 15:36:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-23 15:36:09,837 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:09,837 INFO L353 BasicCegarLoop]: trace histogram [225, 1, 1, 1] [2018-07-23 15:36:09,837 INFO L414 AbstractCegarLoop]: === Iteration 226 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -56618106, now seen corresponding path program 225 times [2018-07-23 15:36:09,838 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25425 backedges. 0 proven. 25425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:11,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:11,227 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [227] total 227 [2018-07-23 15:36:11,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-07-23 15:36:11,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-07-23 15:36:11,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:36:11,233 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 228 states. [2018-07-23 15:36:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:12,806 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-07-23 15:36:12,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-07-23 15:36:12,806 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 228 [2018-07-23 15:36:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:12,807 INFO L225 Difference]: With dead ends: 232 [2018-07-23 15:36:12,807 INFO L226 Difference]: Without dead ends: 230 [2018-07-23 15:36:12,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25878, Invalid=25878, Unknown=0, NotChecked=0, Total=51756 [2018-07-23 15:36:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-07-23 15:36:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-07-23 15:36:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 15:36:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 15:36:12,811 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 228 [2018-07-23 15:36:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:12,812 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 15:36:12,812 INFO L472 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-07-23 15:36:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 15:36:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 15:36:12,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:12,812 INFO L353 BasicCegarLoop]: trace histogram [226, 1, 1, 1] [2018-07-23 15:36:12,813 INFO L414 AbstractCegarLoop]: === Iteration 227 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1755165152, now seen corresponding path program 226 times [2018-07-23 15:36:12,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25651 backedges. 0 proven. 25651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:14,260 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:14,260 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [228] total 228 [2018-07-23 15:36:14,260 INFO L450 AbstractCegarLoop]: Interpolant automaton has 229 states [2018-07-23 15:36:14,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2018-07-23 15:36:14,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:36:14,263 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 229 states. [2018-07-23 15:36:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:15,193 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-07-23 15:36:15,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2018-07-23 15:36:15,193 INFO L78 Accepts]: Start accepts. Automaton has 229 states. Word has length 229 [2018-07-23 15:36:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:15,194 INFO L225 Difference]: With dead ends: 233 [2018-07-23 15:36:15,194 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 15:36:15,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26106, Invalid=26106, Unknown=0, NotChecked=0, Total=52212 [2018-07-23 15:36:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 15:36:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-07-23 15:36:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-07-23 15:36:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-07-23 15:36:15,197 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 229 [2018-07-23 15:36:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:15,198 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-07-23 15:36:15,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 229 states. [2018-07-23 15:36:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-07-23 15:36:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-23 15:36:15,198 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:15,198 INFO L353 BasicCegarLoop]: trace histogram [227, 1, 1, 1] [2018-07-23 15:36:15,199 INFO L414 AbstractCegarLoop]: === Iteration 228 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1424451270, now seen corresponding path program 227 times [2018-07-23 15:36:15,199 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25878 backedges. 0 proven. 25878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:16,640 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:16,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [229] total 229 [2018-07-23 15:36:16,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-07-23 15:36:16,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-07-23 15:36:16,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26335, Invalid=26335, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:36:16,645 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 230 states. [2018-07-23 15:36:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:18,304 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2018-07-23 15:36:18,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2018-07-23 15:36:18,304 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 230 [2018-07-23 15:36:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:18,305 INFO L225 Difference]: With dead ends: 234 [2018-07-23 15:36:18,305 INFO L226 Difference]: Without dead ends: 232 [2018-07-23 15:36:18,309 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26335, Invalid=26335, Unknown=0, NotChecked=0, Total=52670 [2018-07-23 15:36:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-07-23 15:36:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-07-23 15:36:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 15:36:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-07-23 15:36:18,312 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 230 [2018-07-23 15:36:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:18,312 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-07-23 15:36:18,312 INFO L472 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-07-23 15:36:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-07-23 15:36:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 15:36:18,313 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:18,313 INFO L353 BasicCegarLoop]: trace histogram [228, 1, 1, 1] [2018-07-23 15:36:18,313 INFO L414 AbstractCegarLoop]: === Iteration 229 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1208312544, now seen corresponding path program 228 times [2018-07-23 15:36:18,314 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26106 backedges. 0 proven. 26106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:19,774 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:19,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [230] total 230 [2018-07-23 15:36:19,774 INFO L450 AbstractCegarLoop]: Interpolant automaton has 231 states [2018-07-23 15:36:19,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2018-07-23 15:36:19,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26565, Invalid=26565, Unknown=0, NotChecked=0, Total=53130 [2018-07-23 15:36:19,778 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 231 states. [2018-07-23 15:36:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:20,265 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 15:36:20,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2018-07-23 15:36:20,265 INFO L78 Accepts]: Start accepts. Automaton has 231 states. Word has length 231 [2018-07-23 15:36:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:20,266 INFO L225 Difference]: With dead ends: 235 [2018-07-23 15:36:20,266 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 15:36:20,268 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26565, Invalid=26565, Unknown=0, NotChecked=0, Total=53130 [2018-07-23 15:36:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 15:36:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-07-23 15:36:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 15:36:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 15:36:20,270 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 231 [2018-07-23 15:36:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:20,271 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 15:36:20,271 INFO L472 AbstractCegarLoop]: Interpolant automaton has 231 states. [2018-07-23 15:36:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 15:36:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 15:36:20,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:20,271 INFO L353 BasicCegarLoop]: trace histogram [229, 1, 1, 1] [2018-07-23 15:36:20,272 INFO L414 AbstractCegarLoop]: === Iteration 230 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1197020666, now seen corresponding path program 229 times [2018-07-23 15:36:20,272 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26335 backedges. 0 proven. 26335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:21,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:21,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [231] total 231 [2018-07-23 15:36:21,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-07-23 15:36:21,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-07-23 15:36:21,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26796, Invalid=26796, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:36:21,750 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 232 states. [2018-07-23 15:36:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:23,462 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2018-07-23 15:36:23,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2018-07-23 15:36:23,462 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 232 [2018-07-23 15:36:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:23,463 INFO L225 Difference]: With dead ends: 236 [2018-07-23 15:36:23,463 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 15:36:23,467 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26796, Invalid=26796, Unknown=0, NotChecked=0, Total=53592 [2018-07-23 15:36:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 15:36:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-07-23 15:36:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-23 15:36:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-07-23 15:36:23,470 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 232 [2018-07-23 15:36:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:23,470 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-07-23 15:36:23,470 INFO L472 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-07-23 15:36:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-07-23 15:36:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-23 15:36:23,471 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:23,471 INFO L353 BasicCegarLoop]: trace histogram [230, 1, 1, 1] [2018-07-23 15:36:23,471 INFO L414 AbstractCegarLoop]: === Iteration 231 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1547061152, now seen corresponding path program 230 times [2018-07-23 15:36:23,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 26565 backedges. 0 proven. 26565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:24,981 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:24,981 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [232] total 232 [2018-07-23 15:36:24,981 INFO L450 AbstractCegarLoop]: Interpolant automaton has 233 states [2018-07-23 15:36:24,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2018-07-23 15:36:24,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27028, Invalid=27028, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:36:24,987 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 233 states. [2018-07-23 15:36:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:26,163 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-07-23 15:36:26,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2018-07-23 15:36:26,163 INFO L78 Accepts]: Start accepts. Automaton has 233 states. Word has length 233 [2018-07-23 15:36:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:26,164 INFO L225 Difference]: With dead ends: 237 [2018-07-23 15:36:26,164 INFO L226 Difference]: Without dead ends: 235 [2018-07-23 15:36:26,166 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27028, Invalid=27028, Unknown=0, NotChecked=0, Total=54056 [2018-07-23 15:36:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-23 15:36:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-07-23 15:36:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-07-23 15:36:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-07-23 15:36:26,169 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 233 [2018-07-23 15:36:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:26,169 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-07-23 15:36:26,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 233 states. [2018-07-23 15:36:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-07-23 15:36:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-23 15:36:26,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:26,170 INFO L353 BasicCegarLoop]: trace histogram [231, 1, 1, 1] [2018-07-23 15:36:26,170 INFO L414 AbstractCegarLoop]: === Iteration 232 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash 714251590, now seen corresponding path program 231 times [2018-07-23 15:36:26,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 26796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:27,698 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:27,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [233] total 233 [2018-07-23 15:36:27,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-07-23 15:36:27,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-07-23 15:36:27,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27261, Invalid=27261, Unknown=0, NotChecked=0, Total=54522 [2018-07-23 15:36:27,704 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 234 states. [2018-07-23 15:36:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:28,436 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-07-23 15:36:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2018-07-23 15:36:28,437 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 234 [2018-07-23 15:36:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:28,437 INFO L225 Difference]: With dead ends: 238 [2018-07-23 15:36:28,437 INFO L226 Difference]: Without dead ends: 236 [2018-07-23 15:36:28,440 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27261, Invalid=27261, Unknown=0, NotChecked=0, Total=54522 [2018-07-23 15:36:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-07-23 15:36:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-07-23 15:36:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 15:36:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-07-23 15:36:28,443 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 234 [2018-07-23 15:36:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:28,443 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-07-23 15:36:28,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-07-23 15:36:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-07-23 15:36:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 15:36:28,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:28,444 INFO L353 BasicCegarLoop]: trace histogram [232, 1, 1, 1] [2018-07-23 15:36:28,444 INFO L414 AbstractCegarLoop]: === Iteration 233 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash 666958944, now seen corresponding path program 232 times [2018-07-23 15:36:28,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 27028 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:29,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:29,897 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [234] total 234 [2018-07-23 15:36:29,897 INFO L450 AbstractCegarLoop]: Interpolant automaton has 235 states [2018-07-23 15:36:29,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2018-07-23 15:36:29,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27495, Invalid=27495, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:36:29,903 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 235 states. [2018-07-23 15:36:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:31,481 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-07-23 15:36:31,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2018-07-23 15:36:31,481 INFO L78 Accepts]: Start accepts. Automaton has 235 states. Word has length 235 [2018-07-23 15:36:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:31,481 INFO L225 Difference]: With dead ends: 239 [2018-07-23 15:36:31,481 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 15:36:31,484 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27495, Invalid=27495, Unknown=0, NotChecked=0, Total=54990 [2018-07-23 15:36:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 15:36:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-07-23 15:36:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-07-23 15:36:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-07-23 15:36:31,486 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 235 [2018-07-23 15:36:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:31,487 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-07-23 15:36:31,487 INFO L472 AbstractCegarLoop]: Interpolant automaton has 235 states. [2018-07-23 15:36:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-07-23 15:36:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-23 15:36:31,487 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:31,487 INFO L353 BasicCegarLoop]: trace histogram [233, 1, 1, 1] [2018-07-23 15:36:31,487 INFO L414 AbstractCegarLoop]: === Iteration 234 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash -799113082, now seen corresponding path program 233 times [2018-07-23 15:36:31,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27261 backedges. 0 proven. 27261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:33,036 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:33,036 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [235] total 235 [2018-07-23 15:36:33,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-07-23 15:36:33,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-07-23 15:36:33,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27730, Invalid=27730, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:36:33,040 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 236 states. [2018-07-23 15:36:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:34,088 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2018-07-23 15:36:34,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2018-07-23 15:36:34,089 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 236 [2018-07-23 15:36:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:34,089 INFO L225 Difference]: With dead ends: 240 [2018-07-23 15:36:34,089 INFO L226 Difference]: Without dead ends: 238 [2018-07-23 15:36:34,091 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27730, Invalid=27730, Unknown=0, NotChecked=0, Total=55460 [2018-07-23 15:36:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-07-23 15:36:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-07-23 15:36:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-23 15:36:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-07-23 15:36:34,093 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 236 [2018-07-23 15:36:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:34,093 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-07-23 15:36:34,093 INFO L472 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-07-23 15:36:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-07-23 15:36:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-23 15:36:34,094 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:34,094 INFO L353 BasicCegarLoop]: trace histogram [234, 1, 1, 1] [2018-07-23 15:36:34,094 INFO L414 AbstractCegarLoop]: === Iteration 235 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash 997294368, now seen corresponding path program 234 times [2018-07-23 15:36:34,094 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27495 backedges. 0 proven. 27495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:35,660 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:35,661 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [236] total 236 [2018-07-23 15:36:35,661 INFO L450 AbstractCegarLoop]: Interpolant automaton has 237 states [2018-07-23 15:36:35,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 237 interpolants. [2018-07-23 15:36:35,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27966, Invalid=27966, Unknown=0, NotChecked=0, Total=55932 [2018-07-23 15:36:35,668 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 237 states. [2018-07-23 15:36:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:36,784 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 15:36:36,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2018-07-23 15:36:36,784 INFO L78 Accepts]: Start accepts. Automaton has 237 states. Word has length 237 [2018-07-23 15:36:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:36,785 INFO L225 Difference]: With dead ends: 241 [2018-07-23 15:36:36,785 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 15:36:36,789 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27966, Invalid=27966, Unknown=0, NotChecked=0, Total=55932 [2018-07-23 15:36:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 15:36:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-07-23 15:36:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 15:36:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 15:36:36,793 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 237 [2018-07-23 15:36:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:36,793 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 15:36:36,794 INFO L472 AbstractCegarLoop]: Interpolant automaton has 237 states. [2018-07-23 15:36:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 15:36:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 15:36:36,794 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:36,794 INFO L353 BasicCegarLoop]: trace histogram [235, 1, 1, 1] [2018-07-23 15:36:36,794 INFO L414 AbstractCegarLoop]: === Iteration 236 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 851350470, now seen corresponding path program 235 times [2018-07-23 15:36:36,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27730 backedges. 0 proven. 27730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:38,245 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:38,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [237] total 237 [2018-07-23 15:36:38,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-07-23 15:36:38,249 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-07-23 15:36:38,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28203, Invalid=28203, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:36:38,252 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 238 states. [2018-07-23 15:36:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:39,759 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-07-23 15:36:39,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2018-07-23 15:36:39,759 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 238 [2018-07-23 15:36:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:39,759 INFO L225 Difference]: With dead ends: 242 [2018-07-23 15:36:39,759 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 15:36:39,762 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28203, Invalid=28203, Unknown=0, NotChecked=0, Total=56406 [2018-07-23 15:36:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 15:36:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-07-23 15:36:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-23 15:36:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-07-23 15:36:39,764 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 238 [2018-07-23 15:36:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:39,765 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-07-23 15:36:39,765 INFO L472 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-07-23 15:36:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-07-23 15:36:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-23 15:36:39,765 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:39,765 INFO L353 BasicCegarLoop]: trace histogram [236, 1, 1, 1] [2018-07-23 15:36:39,765 INFO L414 AbstractCegarLoop]: === Iteration 237 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 622056928, now seen corresponding path program 236 times [2018-07-23 15:36:39,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 27966 backedges. 0 proven. 27966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:41,351 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:41,352 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [238] total 238 [2018-07-23 15:36:41,352 INFO L450 AbstractCegarLoop]: Interpolant automaton has 239 states [2018-07-23 15:36:41,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2018-07-23 15:36:41,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28441, Invalid=28441, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:36:41,357 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 239 states. [2018-07-23 15:36:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:42,546 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-07-23 15:36:42,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2018-07-23 15:36:42,547 INFO L78 Accepts]: Start accepts. Automaton has 239 states. Word has length 239 [2018-07-23 15:36:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:42,547 INFO L225 Difference]: With dead ends: 243 [2018-07-23 15:36:42,547 INFO L226 Difference]: Without dead ends: 241 [2018-07-23 15:36:42,549 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28441, Invalid=28441, Unknown=0, NotChecked=0, Total=56882 [2018-07-23 15:36:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-07-23 15:36:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-07-23 15:36:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-23 15:36:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-07-23 15:36:42,551 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 239 [2018-07-23 15:36:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:42,552 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-07-23 15:36:42,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 239 states. [2018-07-23 15:36:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-07-23 15:36:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-23 15:36:42,552 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:42,552 INFO L353 BasicCegarLoop]: trace histogram [237, 1, 1, 1] [2018-07-23 15:36:42,553 INFO L414 AbstractCegarLoop]: === Iteration 238 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2103891718, now seen corresponding path program 237 times [2018-07-23 15:36:42,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28203 backedges. 0 proven. 28203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:44,166 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:44,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [239] total 239 [2018-07-23 15:36:44,167 INFO L450 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-07-23 15:36:44,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-07-23 15:36:44,172 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28680, Invalid=28680, Unknown=0, NotChecked=0, Total=57360 [2018-07-23 15:36:44,172 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 240 states. [2018-07-23 15:36:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:44,941 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-07-23 15:36:44,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2018-07-23 15:36:44,942 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 240 [2018-07-23 15:36:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:44,942 INFO L225 Difference]: With dead ends: 244 [2018-07-23 15:36:44,942 INFO L226 Difference]: Without dead ends: 242 [2018-07-23 15:36:44,945 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28680, Invalid=28680, Unknown=0, NotChecked=0, Total=57360 [2018-07-23 15:36:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-07-23 15:36:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2018-07-23 15:36:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 15:36:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-07-23 15:36:44,948 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 240 [2018-07-23 15:36:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:44,948 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-07-23 15:36:44,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-07-23 15:36:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-07-23 15:36:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 15:36:44,948 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:44,948 INFO L353 BasicCegarLoop]: trace histogram [238, 1, 1, 1] [2018-07-23 15:36:44,949 INFO L414 AbstractCegarLoop]: === Iteration 239 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash 796129952, now seen corresponding path program 238 times [2018-07-23 15:36:44,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 28441 backedges. 0 proven. 28441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:46,438 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:46,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [240] total 240 [2018-07-23 15:36:46,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 241 states [2018-07-23 15:36:46,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 241 interpolants. [2018-07-23 15:36:46,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28920, Invalid=28920, Unknown=0, NotChecked=0, Total=57840 [2018-07-23 15:36:46,444 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 241 states. [2018-07-23 15:36:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:48,399 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-07-23 15:36:48,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2018-07-23 15:36:48,399 INFO L78 Accepts]: Start accepts. Automaton has 241 states. Word has length 241 [2018-07-23 15:36:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:48,400 INFO L225 Difference]: With dead ends: 245 [2018-07-23 15:36:48,400 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 15:36:48,402 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28920, Invalid=28920, Unknown=0, NotChecked=0, Total=57840 [2018-07-23 15:36:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 15:36:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-07-23 15:36:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-07-23 15:36:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-07-23 15:36:48,405 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 241 [2018-07-23 15:36:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:48,405 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-07-23 15:36:48,405 INFO L472 AbstractCegarLoop]: Interpolant automaton has 241 states. [2018-07-23 15:36:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-07-23 15:36:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-23 15:36:48,406 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:48,406 INFO L353 BasicCegarLoop]: trace histogram [239, 1, 1, 1] [2018-07-23 15:36:48,406 INFO L414 AbstractCegarLoop]: === Iteration 240 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:48,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1089779130, now seen corresponding path program 239 times [2018-07-23 15:36:48,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28680 backedges. 0 proven. 28680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:50,135 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:50,135 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [241] total 241 [2018-07-23 15:36:50,135 INFO L450 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-07-23 15:36:50,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-07-23 15:36:50,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29161, Invalid=29161, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:36:50,140 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 242 states. [2018-07-23 15:36:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:51,903 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2018-07-23 15:36:51,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2018-07-23 15:36:51,904 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 242 [2018-07-23 15:36:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:51,904 INFO L225 Difference]: With dead ends: 246 [2018-07-23 15:36:51,904 INFO L226 Difference]: Without dead ends: 244 [2018-07-23 15:36:51,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29161, Invalid=29161, Unknown=0, NotChecked=0, Total=58322 [2018-07-23 15:36:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-07-23 15:36:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-07-23 15:36:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 15:36:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-07-23 15:36:51,908 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 242 [2018-07-23 15:36:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:51,909 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-07-23 15:36:51,909 INFO L472 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-07-23 15:36:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-07-23 15:36:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 15:36:51,909 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:51,909 INFO L353 BasicCegarLoop]: trace histogram [240, 1, 1, 1] [2018-07-23 15:36:51,910 INFO L414 AbstractCegarLoop]: === Iteration 241 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash 576581472, now seen corresponding path program 240 times [2018-07-23 15:36:51,910 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28920 backedges. 0 proven. 28920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:53,684 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:53,684 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [242] total 242 [2018-07-23 15:36:53,684 INFO L450 AbstractCegarLoop]: Interpolant automaton has 243 states [2018-07-23 15:36:53,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2018-07-23 15:36:53,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29403, Invalid=29403, Unknown=0, NotChecked=0, Total=58806 [2018-07-23 15:36:53,692 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 243 states. [2018-07-23 15:36:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:54,362 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 15:36:54,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2018-07-23 15:36:54,363 INFO L78 Accepts]: Start accepts. Automaton has 243 states. Word has length 243 [2018-07-23 15:36:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:54,363 INFO L225 Difference]: With dead ends: 247 [2018-07-23 15:36:54,363 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 15:36:54,366 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29403, Invalid=29403, Unknown=0, NotChecked=0, Total=58806 [2018-07-23 15:36:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 15:36:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-07-23 15:36:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 15:36:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 15:36:54,369 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 243 [2018-07-23 15:36:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:54,369 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 15:36:54,369 INFO L472 AbstractCegarLoop]: Interpolant automaton has 243 states. [2018-07-23 15:36:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 15:36:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 15:36:54,370 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:54,370 INFO L353 BasicCegarLoop]: trace histogram [241, 1, 1, 1] [2018-07-23 15:36:54,370 INFO L414 AbstractCegarLoop]: === Iteration 242 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash 694152582, now seen corresponding path program 241 times [2018-07-23 15:36:54,370 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29161 backedges. 0 proven. 29161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:55,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:55,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [243] total 243 [2018-07-23 15:36:55,990 INFO L450 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-07-23 15:36:55,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-07-23 15:36:55,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29646, Invalid=29646, Unknown=0, NotChecked=0, Total=59292 [2018-07-23 15:36:55,996 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 244 states. [2018-07-23 15:36:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:36:57,526 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2018-07-23 15:36:57,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2018-07-23 15:36:57,526 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 244 [2018-07-23 15:36:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:36:57,527 INFO L225 Difference]: With dead ends: 248 [2018-07-23 15:36:57,527 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 15:36:57,530 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29646, Invalid=29646, Unknown=0, NotChecked=0, Total=59292 [2018-07-23 15:36:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 15:36:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-07-23 15:36:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-23 15:36:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-07-23 15:36:57,533 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 244 [2018-07-23 15:36:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:36:57,533 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-07-23 15:36:57,533 INFO L472 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-07-23 15:36:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-07-23 15:36:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-23 15:36:57,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:36:57,534 INFO L353 BasicCegarLoop]: trace histogram [242, 1, 1, 1] [2018-07-23 15:36:57,534 INFO L414 AbstractCegarLoop]: === Iteration 243 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:36:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 43889696, now seen corresponding path program 242 times [2018-07-23 15:36:57,534 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:36:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:36:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 29403 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:36:59,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:36:59,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [244] total 244 [2018-07-23 15:36:59,281 INFO L450 AbstractCegarLoop]: Interpolant automaton has 245 states [2018-07-23 15:36:59,285 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2018-07-23 15:36:59,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29890, Invalid=29890, Unknown=0, NotChecked=0, Total=59780 [2018-07-23 15:36:59,287 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 245 states. [2018-07-23 15:37:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:01,066 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-07-23 15:37:01,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2018-07-23 15:37:01,067 INFO L78 Accepts]: Start accepts. Automaton has 245 states. Word has length 245 [2018-07-23 15:37:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:01,067 INFO L225 Difference]: With dead ends: 249 [2018-07-23 15:37:01,067 INFO L226 Difference]: Without dead ends: 247 [2018-07-23 15:37:01,071 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29890, Invalid=29890, Unknown=0, NotChecked=0, Total=59780 [2018-07-23 15:37:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-23 15:37:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-07-23 15:37:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-07-23 15:37:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-07-23 15:37:01,074 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 245 [2018-07-23 15:37:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:01,074 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-07-23 15:37:01,074 INFO L472 AbstractCegarLoop]: Interpolant automaton has 245 states. [2018-07-23 15:37:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-07-23 15:37:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-23 15:37:01,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:01,075 INFO L353 BasicCegarLoop]: trace histogram [243, 1, 1, 1] [2018-07-23 15:37:01,075 INFO L414 AbstractCegarLoop]: === Iteration 244 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1360576710, now seen corresponding path program 243 times [2018-07-23 15:37:01,075 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29646 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:03,015 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:03,016 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [245] total 245 [2018-07-23 15:37:03,016 INFO L450 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-07-23 15:37:03,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-07-23 15:37:03,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30135, Invalid=30135, Unknown=0, NotChecked=0, Total=60270 [2018-07-23 15:37:03,020 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 246 states. [2018-07-23 15:37:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:05,181 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-07-23 15:37:05,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2018-07-23 15:37:05,181 INFO L78 Accepts]: Start accepts. Automaton has 246 states. Word has length 246 [2018-07-23 15:37:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:05,182 INFO L225 Difference]: With dead ends: 250 [2018-07-23 15:37:05,182 INFO L226 Difference]: Without dead ends: 248 [2018-07-23 15:37:05,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30135, Invalid=30135, Unknown=0, NotChecked=0, Total=60270 [2018-07-23 15:37:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-07-23 15:37:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-07-23 15:37:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-07-23 15:37:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-07-23 15:37:05,186 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 246 [2018-07-23 15:37:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:05,186 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-07-23 15:37:05,186 INFO L472 AbstractCegarLoop]: Interpolant automaton has 246 states. [2018-07-23 15:37:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-07-23 15:37:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-07-23 15:37:05,187 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:05,187 INFO L353 BasicCegarLoop]: trace histogram [244, 1, 1, 1] [2018-07-23 15:37:05,187 INFO L414 AbstractCegarLoop]: === Iteration 245 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -771798816, now seen corresponding path program 244 times [2018-07-23 15:37:05,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 29890 backedges. 0 proven. 29890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:07,143 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:07,143 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [246] total 246 [2018-07-23 15:37:07,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 247 states [2018-07-23 15:37:07,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 247 interpolants. [2018-07-23 15:37:07,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30381, Invalid=30381, Unknown=0, NotChecked=0, Total=60762 [2018-07-23 15:37:07,147 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 247 states. [2018-07-23 15:37:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:09,001 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-07-23 15:37:09,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2018-07-23 15:37:09,001 INFO L78 Accepts]: Start accepts. Automaton has 247 states. Word has length 247 [2018-07-23 15:37:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:09,002 INFO L225 Difference]: With dead ends: 251 [2018-07-23 15:37:09,002 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 15:37:09,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30381, Invalid=30381, Unknown=0, NotChecked=0, Total=60762 [2018-07-23 15:37:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 15:37:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-07-23 15:37:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-07-23 15:37:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-07-23 15:37:09,005 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 247 [2018-07-23 15:37:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:09,006 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-07-23 15:37:09,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 247 states. [2018-07-23 15:37:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-07-23 15:37:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-07-23 15:37:09,006 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:09,006 INFO L353 BasicCegarLoop]: trace histogram [245, 1, 1, 1] [2018-07-23 15:37:09,006 INFO L414 AbstractCegarLoop]: === Iteration 246 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1844036614, now seen corresponding path program 245 times [2018-07-23 15:37:09,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30135 backedges. 0 proven. 30135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:10,790 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:10,790 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [247] total 247 [2018-07-23 15:37:10,791 INFO L450 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-07-23 15:37:10,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-07-23 15:37:10,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30628, Invalid=30628, Unknown=0, NotChecked=0, Total=61256 [2018-07-23 15:37:10,797 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 248 states. [2018-07-23 15:37:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:11,953 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2018-07-23 15:37:11,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2018-07-23 15:37:11,953 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 248 [2018-07-23 15:37:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:11,953 INFO L225 Difference]: With dead ends: 252 [2018-07-23 15:37:11,953 INFO L226 Difference]: Without dead ends: 250 [2018-07-23 15:37:11,956 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30628, Invalid=30628, Unknown=0, NotChecked=0, Total=61256 [2018-07-23 15:37:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-07-23 15:37:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-07-23 15:37:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-07-23 15:37:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2018-07-23 15:37:11,959 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 248 [2018-07-23 15:37:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:11,959 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2018-07-23 15:37:11,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-07-23 15:37:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2018-07-23 15:37:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-23 15:37:11,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:11,960 INFO L353 BasicCegarLoop]: trace histogram [246, 1, 1, 1] [2018-07-23 15:37:11,960 INFO L414 AbstractCegarLoop]: === Iteration 247 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1330556320, now seen corresponding path program 246 times [2018-07-23 15:37:11,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30381 backedges. 0 proven. 30381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:13,584 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:13,584 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [248] total 248 [2018-07-23 15:37:13,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 249 states [2018-07-23 15:37:13,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2018-07-23 15:37:13,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30876, Invalid=30876, Unknown=0, NotChecked=0, Total=61752 [2018-07-23 15:37:13,590 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 249 states. [2018-07-23 15:37:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:15,135 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 15:37:15,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2018-07-23 15:37:15,135 INFO L78 Accepts]: Start accepts. Automaton has 249 states. Word has length 249 [2018-07-23 15:37:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:15,136 INFO L225 Difference]: With dead ends: 253 [2018-07-23 15:37:15,136 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 15:37:15,139 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30876, Invalid=30876, Unknown=0, NotChecked=0, Total=61752 [2018-07-23 15:37:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 15:37:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-07-23 15:37:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 15:37:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-07-23 15:37:15,142 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 249 [2018-07-23 15:37:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:15,142 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-07-23 15:37:15,142 INFO L472 AbstractCegarLoop]: Interpolant automaton has 249 states. [2018-07-23 15:37:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-07-23 15:37:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 15:37:15,143 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:15,143 INFO L353 BasicCegarLoop]: trace histogram [247, 1, 1, 1] [2018-07-23 15:37:15,143 INFO L414 AbstractCegarLoop]: === Iteration 248 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1702430906, now seen corresponding path program 247 times [2018-07-23 15:37:15,143 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30628 backedges. 0 proven. 30628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:17,145 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:17,145 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [249] total 249 [2018-07-23 15:37:17,145 INFO L450 AbstractCegarLoop]: Interpolant automaton has 250 states [2018-07-23 15:37:17,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2018-07-23 15:37:17,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31125, Invalid=31125, Unknown=0, NotChecked=0, Total=62250 [2018-07-23 15:37:17,153 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 250 states. [2018-07-23 15:37:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:17,895 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-07-23 15:37:17,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2018-07-23 15:37:17,895 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 250 [2018-07-23 15:37:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:17,896 INFO L225 Difference]: With dead ends: 254 [2018-07-23 15:37:17,896 INFO L226 Difference]: Without dead ends: 252 [2018-07-23 15:37:17,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31125, Invalid=31125, Unknown=0, NotChecked=0, Total=62250 [2018-07-23 15:37:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-23 15:37:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-07-23 15:37:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-07-23 15:37:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2018-07-23 15:37:17,901 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 250 [2018-07-23 15:37:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:17,901 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2018-07-23 15:37:17,902 INFO L472 AbstractCegarLoop]: Interpolant automaton has 250 states. [2018-07-23 15:37:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2018-07-23 15:37:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-23 15:37:17,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:17,902 INFO L353 BasicCegarLoop]: trace histogram [248, 1, 1, 1] [2018-07-23 15:37:17,902 INFO L414 AbstractCegarLoop]: === Iteration 249 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1235754400, now seen corresponding path program 248 times [2018-07-23 15:37:17,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30876 backedges. 0 proven. 30876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:19,738 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:19,738 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [250] total 250 [2018-07-23 15:37:19,738 INFO L450 AbstractCegarLoop]: Interpolant automaton has 251 states [2018-07-23 15:37:19,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2018-07-23 15:37:19,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31375, Invalid=31375, Unknown=0, NotChecked=0, Total=62750 [2018-07-23 15:37:19,744 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 251 states. [2018-07-23 15:37:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:21,364 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-07-23 15:37:21,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2018-07-23 15:37:21,364 INFO L78 Accepts]: Start accepts. Automaton has 251 states. Word has length 251 [2018-07-23 15:37:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:21,364 INFO L225 Difference]: With dead ends: 255 [2018-07-23 15:37:21,365 INFO L226 Difference]: Without dead ends: 253 [2018-07-23 15:37:21,367 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=31375, Invalid=31375, Unknown=0, NotChecked=0, Total=62750 [2018-07-23 15:37:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-07-23 15:37:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-07-23 15:37:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-07-23 15:37:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-07-23 15:37:21,370 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 251 [2018-07-23 15:37:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:21,370 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-07-23 15:37:21,370 INFO L472 AbstractCegarLoop]: Interpolant automaton has 251 states. [2018-07-23 15:37:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-07-23 15:37:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-23 15:37:21,371 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:21,371 INFO L353 BasicCegarLoop]: trace histogram [249, 1, 1, 1] [2018-07-23 15:37:21,371 INFO L414 AbstractCegarLoop]: === Iteration 250 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash 346315398, now seen corresponding path program 249 times [2018-07-23 15:37:21,371 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31125 backedges. 0 proven. 31125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:23,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:23,203 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [251] total 251 [2018-07-23 15:37:23,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-07-23 15:37:23,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-07-23 15:37:23,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31626, Invalid=31626, Unknown=0, NotChecked=0, Total=63252 [2018-07-23 15:37:23,208 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 252 states. [2018-07-23 15:37:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:23,800 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-07-23 15:37:23,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2018-07-23 15:37:23,800 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 252 [2018-07-23 15:37:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:23,801 INFO L225 Difference]: With dead ends: 256 [2018-07-23 15:37:23,801 INFO L226 Difference]: Without dead ends: 254 [2018-07-23 15:37:23,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=31626, Invalid=31626, Unknown=0, NotChecked=0, Total=63252 [2018-07-23 15:37:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-07-23 15:37:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-07-23 15:37:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-07-23 15:37:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-07-23 15:37:23,806 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 252 [2018-07-23 15:37:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:23,806 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-07-23 15:37:23,806 INFO L472 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-07-23 15:37:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-07-23 15:37:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-23 15:37:23,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:23,807 INFO L353 BasicCegarLoop]: trace histogram [250, 1, 1, 1] [2018-07-23 15:37:23,807 INFO L414 AbstractCegarLoop]: === Iteration 251 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2145838880, now seen corresponding path program 250 times [2018-07-23 15:37:23,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 31375 backedges. 0 proven. 31375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:25,671 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:25,672 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [252] total 252 [2018-07-23 15:37:25,672 INFO L450 AbstractCegarLoop]: Interpolant automaton has 253 states [2018-07-23 15:37:25,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 253 interpolants. [2018-07-23 15:37:25,676 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31878, Invalid=31878, Unknown=0, NotChecked=0, Total=63756 [2018-07-23 15:37:25,676 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 253 states. [2018-07-23 15:37:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:27,699 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-07-23 15:37:27,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2018-07-23 15:37:27,699 INFO L78 Accepts]: Start accepts. Automaton has 253 states. Word has length 253 [2018-07-23 15:37:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:27,700 INFO L225 Difference]: With dead ends: 257 [2018-07-23 15:37:27,700 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 15:37:27,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31878, Invalid=31878, Unknown=0, NotChecked=0, Total=63756 [2018-07-23 15:37:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 15:37:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-07-23 15:37:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-23 15:37:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-07-23 15:37:27,705 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 253 [2018-07-23 15:37:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:27,705 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-07-23 15:37:27,705 INFO L472 AbstractCegarLoop]: Interpolant automaton has 253 states. [2018-07-23 15:37:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-07-23 15:37:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-23 15:37:27,706 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:27,706 INFO L353 BasicCegarLoop]: trace histogram [251, 1, 1, 1] [2018-07-23 15:37:27,706 INFO L414 AbstractCegarLoop]: === Iteration 252 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2096491974, now seen corresponding path program 251 times [2018-07-23 15:37:27,706 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31626 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:29,592 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:29,592 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [253] total 253 [2018-07-23 15:37:29,592 INFO L450 AbstractCegarLoop]: Interpolant automaton has 254 states [2018-07-23 15:37:29,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2018-07-23 15:37:29,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32131, Invalid=32131, Unknown=0, NotChecked=0, Total=64262 [2018-07-23 15:37:29,596 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 254 states. [2018-07-23 15:37:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:30,247 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2018-07-23 15:37:30,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2018-07-23 15:37:30,247 INFO L78 Accepts]: Start accepts. Automaton has 254 states. Word has length 254 [2018-07-23 15:37:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:30,247 INFO L225 Difference]: With dead ends: 258 [2018-07-23 15:37:30,247 INFO L226 Difference]: Without dead ends: 256 [2018-07-23 15:37:30,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32131, Invalid=32131, Unknown=0, NotChecked=0, Total=64262 [2018-07-23 15:37:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-07-23 15:37:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-07-23 15:37:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-23 15:37:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-07-23 15:37:30,251 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 254 [2018-07-23 15:37:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:30,251 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-07-23 15:37:30,251 INFO L472 AbstractCegarLoop]: Interpolant automaton has 254 states. [2018-07-23 15:37:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-07-23 15:37:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-23 15:37:30,252 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:30,252 INFO L353 BasicCegarLoop]: trace histogram [252, 1, 1, 1] [2018-07-23 15:37:30,253 INFO L414 AbstractCegarLoop]: === Iteration 253 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash 566737888, now seen corresponding path program 252 times [2018-07-23 15:37:30,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:37:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31878 backedges. 0 proven. 31878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:37:32,228 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:37:32,228 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [254] total 254 [2018-07-23 15:37:32,229 INFO L450 AbstractCegarLoop]: Interpolant automaton has 255 states [2018-07-23 15:37:32,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 255 interpolants. [2018-07-23 15:37:32,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32385, Invalid=32385, Unknown=0, NotChecked=0, Total=64770 [2018-07-23 15:37:32,237 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 255 states. [2018-07-23 15:37:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:37:34,495 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 15:37:34,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2018-07-23 15:37:34,496 INFO L78 Accepts]: Start accepts. Automaton has 255 states. Word has length 255 [2018-07-23 15:37:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:37:34,496 INFO L225 Difference]: With dead ends: 259 [2018-07-23 15:37:34,496 INFO L226 Difference]: Without dead ends: 257 [2018-07-23 15:37:34,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32385, Invalid=32385, Unknown=0, NotChecked=0, Total=64770 [2018-07-23 15:37:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-23 15:37:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-07-23 15:37:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 15:37:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-07-23 15:37:34,502 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 255 [2018-07-23 15:37:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:37:34,502 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-07-23 15:37:34,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 255 states. [2018-07-23 15:37:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-07-23 15:37:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 15:37:34,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:37:34,503 INFO L353 BasicCegarLoop]: trace histogram [253, 1, 1, 1] [2018-07-23 15:37:34,503 INFO L414 AbstractCegarLoop]: === Iteration 254 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:37:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 389001478, now seen corresponding path program 253 times [2018-07-23 15:37:34,503 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy Received shutdown request... [2018-07-23 15:37:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:37:34,947 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:262) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:193) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:204) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.FixedRefinementStrategy.getTraceCheck(FixedRefinementStrategy.java:130) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:406) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-07-23 15:37:34,951 INFO L168 Benchmark]: Toolchain (without parser) took 261637.55 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: -1.2 GB). Peak memory consumption was 436.0 MB. Max. memory is 7.1 GB. [2018-07-23 15:37:34,952 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:37:34,953 INFO L168 Benchmark]: Boogie Preprocessor took 47.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:37:34,953 INFO L168 Benchmark]: RCFGBuilder took 204.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:37:34,953 INFO L168 Benchmark]: TraceAbstraction took 261381.69 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 425.4 MB. Max. memory is 7.1 GB. [2018-07-23 15:37:34,955 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.09 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 204.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 261381.69 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 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 425.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-37-34-963.csv Completed graceful shutdown