java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array4.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-04 21:29:28,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-04 21:29:28,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-04 21:29:28,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-04 21:29:28,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-04 21:29:28,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-04 21:29:28,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-04 21:29:28,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-04 21:29:28,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-04 21:29:28,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-04 21:29:28,880 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-04 21:29:28,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-04 21:29:28,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-04 21:29:28,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-04 21:29:28,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-04 21:29:28,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-04 21:29:28,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-04 21:29:28,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-04 21:29:28,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-04 21:29:28,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-04 21:29:28,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-04 21:29:28,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-04 21:29:28,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-04 21:29:28,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-04 21:29:28,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-04 21:29:28,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-04 21:29:28,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-04 21:29:28,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-04 21:29:28,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-04 21:29:28,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-04 21:29:28,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-04 21:29:28,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-04 21:29:28,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-04 21:29:28,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-04 21:29:28,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-04 21:29:28,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-04 21:29:28,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-04 21:29:28,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-04 21:29:28,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-04 21:29:28,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-04 21:29:28,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-04 21:29:28,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-04 21:29:28,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-04 21:29:28,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-04 21:29:28,958 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-04 21:29:28,959 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-04 21:29:28,959 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array4.i_4.bpl [2019-08-04 21:29:28,960 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array4.i_4.bpl' [2019-08-04 21:29:28,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-04 21:29:28,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-04 21:29:28,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-04 21:29:28,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-04 21:29:29,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-04 21:29:29,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-04 21:29:29,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-04 21:29:29,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-04 21:29:29,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-04 21:29:29,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... [2019-08-04 21:29:29,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-04 21:29:29,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-04 21:29:29,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-04 21:29:29,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-04 21:29:29,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-04 21:29:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-04 21:29:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-04 21:29:29,350 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-04 21:29:29,350 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-08-04 21:29:29,351 INFO L202 PluginConnector]: Adding new model array4.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:29:29 BoogieIcfgContainer [2019-08-04 21:29:29,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-04 21:29:29,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-04 21:29:29,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-04 21:29:29,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-04 21:29:29,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:29:28" (1/2) ... [2019-08-04 21:29:29,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145e0941 and model type array4.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:29:29, skipping insertion in model container [2019-08-04 21:29:29,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array4.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:29:29" (2/2) ... [2019-08-04 21:29:29,364 INFO L109 eAbstractionObserver]: Analyzing ICFG array4.i_4.bpl [2019-08-04 21:29:29,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-04 21:29:29,383 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-04 21:29:29,400 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-04 21:29:29,427 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-04 21:29:29,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-04 21:29:29,428 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-04 21:29:29,428 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-04 21:29:29,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-04 21:29:29,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-04 21:29:29,429 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-04 21:29:29,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-04 21:29:29,429 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-04 21:29:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-04 21:29:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-04 21:29:29,451 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:29,452 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-04 21:29:29,454 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 928714, now seen corresponding path program 1 times [2019-08-04 21:29:29,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:29,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-04 21:29:29,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:29:29,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-04 21:29:29,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-04 21:29:29,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-04 21:29:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-04 21:29:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-04 21:29:29,602 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-08-04 21:29:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:29,690 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2019-08-04 21:29:29,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-04 21:29:29,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-08-04 21:29:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:29,707 INFO L225 Difference]: With dead ends: 7 [2019-08-04 21:29:29,707 INFO L226 Difference]: Without dead ends: 7 [2019-08-04 21:29:29,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-04 21:29:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-04 21:29:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-04 21:29:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-04 21:29:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-08-04 21:29:29,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-08-04 21:29:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:29,746 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-08-04 21:29:29,746 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-04 21:29:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-08-04 21:29:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-04 21:29:29,747 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:29,747 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-04 21:29:29,747 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:29,748 INFO L82 PathProgramCache]: Analyzing trace with hash 894131125, now seen corresponding path program 1 times [2019-08-04 21:29:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:29,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-04 21:29:29,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-04 21:29:29,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:29,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:29:29,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:29:29,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:29:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:29:29,883 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2019-08-04 21:29:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:29,936 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-04 21:29:29,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:29:29,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-08-04 21:29:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:29,938 INFO L225 Difference]: With dead ends: 9 [2019-08-04 21:29:29,938 INFO L226 Difference]: Without dead ends: 9 [2019-08-04 21:29:29,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:29:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-04 21:29:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-04 21:29:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-04 21:29:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-04 21:29:29,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-08-04 21:29:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:29,943 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-04 21:29:29,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:29:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-04 21:29:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-04 21:29:29,945 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:29,945 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-08-04 21:29:29,945 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash 315556586, now seen corresponding path program 2 times [2019-08-04 21:29:29,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:29,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-04 21:29:29,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-04 21:29:30,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:30,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-04 21:29:30,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-04 21:29:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-04 21:29:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:29:30,054 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2019-08-04 21:29:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:30,153 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-08-04 21:29:30,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-04 21:29:30,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-08-04 21:29:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:30,154 INFO L225 Difference]: With dead ends: 11 [2019-08-04 21:29:30,155 INFO L226 Difference]: Without dead ends: 11 [2019-08-04 21:29:30,155 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:29:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-04 21:29:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-04 21:29:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-04 21:29:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-04 21:29:30,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-08-04 21:29:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:30,158 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-04 21:29:30,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-04 21:29:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-04 21:29:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-04 21:29:30,159 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:30,159 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1] [2019-08-04 21:29:30,160 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash -175395819, now seen corresponding path program 3 times [2019-08-04 21:29:30,161 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:30,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-04 21:29:30,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-08-04 21:29:30,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:30,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:29:30,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:29:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:29:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:29:30,305 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2019-08-04 21:29:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:30,386 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-04 21:29:30,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-04 21:29:30,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-08-04 21:29:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:30,387 INFO L225 Difference]: With dead ends: 13 [2019-08-04 21:29:30,388 INFO L226 Difference]: Without dead ends: 13 [2019-08-04 21:29:30,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:29:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-04 21:29:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-08-04 21:29:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-04 21:29:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-04 21:29:30,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-08-04 21:29:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:30,391 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-04 21:29:30,391 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:29:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-04 21:29:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-04 21:29:30,392 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:30,392 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2019-08-04 21:29:30,392 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1258544630, now seen corresponding path program 4 times [2019-08-04 21:29:30,394 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:30,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-04 21:29:30,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-08-04 21:29:30,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:30,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-04 21:29:30,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-04 21:29:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-04 21:29:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-08-04 21:29:30,737 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2019-08-04 21:29:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:30,796 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-08-04 21:29:30,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-04 21:29:30,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-08-04 21:29:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:30,798 INFO L225 Difference]: With dead ends: 15 [2019-08-04 21:29:30,798 INFO L226 Difference]: Without dead ends: 15 [2019-08-04 21:29:30,799 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-08-04 21:29:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-08-04 21:29:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-08-04 21:29:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-08-04 21:29:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-08-04 21:29:30,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-08-04 21:29:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:30,802 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-08-04 21:29:30,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-04 21:29:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-08-04 21:29:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-04 21:29:30,803 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:30,803 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1] [2019-08-04 21:29:30,804 INFO L418 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash -400886667, now seen corresponding path program 5 times [2019-08-04 21:29:30,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:30,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2019-08-04 21:29:30,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-08-04 21:29:30,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:30,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-08-04 21:29:30,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-08-04 21:29:30,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-08-04 21:29:30,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:29:30,958 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-08-04 21:29:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:31,098 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-08-04 21:29:31,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-04 21:29:31,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-08-04 21:29:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:31,099 INFO L225 Difference]: With dead ends: 17 [2019-08-04 21:29:31,099 INFO L226 Difference]: Without dead ends: 17 [2019-08-04 21:29:31,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:29:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-08-04 21:29:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-08-04 21:29:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-08-04 21:29:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-08-04 21:29:31,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2019-08-04 21:29:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:31,105 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-08-04 21:29:31,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-08-04 21:29:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-08-04 21:29:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-08-04 21:29:31,106 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:31,106 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2019-08-04 21:29:31,106 INFO L418 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash -10778326, now seen corresponding path program 6 times [2019-08-04 21:29:31,108 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:31,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-04 21:29:31,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-08-04 21:29:31,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:31,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-08-04 21:29:31,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-08-04 21:29:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-08-04 21:29:31,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-08-04 21:29:31,306 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-08-04 21:29:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:31,376 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-08-04 21:29:31,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-08-04 21:29:31,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-08-04 21:29:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:31,378 INFO L225 Difference]: With dead ends: 19 [2019-08-04 21:29:31,378 INFO L226 Difference]: Without dead ends: 19 [2019-08-04 21:29:31,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-08-04 21:29:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-08-04 21:29:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-08-04 21:29:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-08-04 21:29:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-08-04 21:29:31,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2019-08-04 21:29:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:31,383 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-08-04 21:29:31,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-08-04 21:29:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-08-04 21:29:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-08-04 21:29:31,384 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:31,384 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1] [2019-08-04 21:29:31,384 INFO L418 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash 701707477, now seen corresponding path program 7 times [2019-08-04 21:29:31,386 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:31,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-08-04 21:29:31,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-08-04 21:29:31,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:31,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-08-04 21:29:31,799 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-08-04 21:29:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-08-04 21:29:31,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-08-04 21:29:31,800 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2019-08-04 21:29:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:31,847 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-08-04 21:29:31,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-08-04 21:29:31,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-08-04 21:29:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:31,849 INFO L225 Difference]: With dead ends: 21 [2019-08-04 21:29:31,849 INFO L226 Difference]: Without dead ends: 21 [2019-08-04 21:29:31,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-08-04 21:29:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-08-04 21:29:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-08-04 21:29:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-08-04 21:29:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-08-04 21:29:31,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-08-04 21:29:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:31,854 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-08-04 21:29:31,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-08-04 21:29:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-08-04 21:29:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-08-04 21:29:31,854 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:31,854 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1] [2019-08-04 21:29:31,855 INFO L418 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash -718063542, now seen corresponding path program 8 times [2019-08-04 21:29:31,856 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:31,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-08-04 21:29:31,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-08-04 21:29:32,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:32,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-08-04 21:29:32,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-08-04 21:29:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-08-04 21:29:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-08-04 21:29:32,041 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2019-08-04 21:29:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:32,119 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-08-04 21:29:32,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-08-04 21:29:32,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-08-04 21:29:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:32,120 INFO L225 Difference]: With dead ends: 23 [2019-08-04 21:29:32,120 INFO L226 Difference]: Without dead ends: 23 [2019-08-04 21:29:32,121 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-08-04 21:29:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-08-04 21:29:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-08-04 21:29:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-08-04 21:29:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-08-04 21:29:32,124 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-08-04 21:29:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:32,125 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-08-04 21:29:32,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-08-04 21:29:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-08-04 21:29:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-08-04 21:29:32,126 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:32,126 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1] [2019-08-04 21:29:32,127 INFO L418 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -317821643, now seen corresponding path program 9 times [2019-08-04 21:29:32,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:32,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-08-04 21:29:32,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-08-04 21:29:32,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:32,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-08-04 21:29:32,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-08-04 21:29:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-08-04 21:29:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-08-04 21:29:32,321 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-08-04 21:29:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:32,410 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-08-04 21:29:32,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-08-04 21:29:32,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-08-04 21:29:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:32,412 INFO L225 Difference]: With dead ends: 25 [2019-08-04 21:29:32,412 INFO L226 Difference]: Without dead ends: 25 [2019-08-04 21:29:32,412 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-08-04 21:29:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-08-04 21:29:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-08-04 21:29:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-08-04 21:29:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-08-04 21:29:32,416 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2019-08-04 21:29:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:32,416 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-08-04 21:29:32,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-08-04 21:29:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-08-04 21:29:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-08-04 21:29:32,417 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:32,417 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2019-08-04 21:29:32,417 INFO L418 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:32,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1145646954, now seen corresponding path program 10 times [2019-08-04 21:29:32,419 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:32,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-04 21:29:32,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-08-04 21:29:32,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:32,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-08-04 21:29:32,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-08-04 21:29:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-08-04 21:29:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-08-04 21:29:32,825 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2019-08-04 21:29:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:33,161 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-08-04 21:29:33,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-08-04 21:29:33,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2019-08-04 21:29:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:33,162 INFO L225 Difference]: With dead ends: 27 [2019-08-04 21:29:33,163 INFO L226 Difference]: Without dead ends: 27 [2019-08-04 21:29:33,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-08-04 21:29:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-08-04 21:29:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-08-04 21:29:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-08-04 21:29:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-08-04 21:29:33,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2019-08-04 21:29:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:33,167 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-08-04 21:29:33,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-08-04 21:29:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-08-04 21:29:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-08-04 21:29:33,168 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:33,168 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1] [2019-08-04 21:29:33,169 INFO L418 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 430349717, now seen corresponding path program 11 times [2019-08-04 21:29:33,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:33,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2019-08-04 21:29:33,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-08-04 21:29:33,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:33,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-08-04 21:29:33,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-08-04 21:29:33,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-08-04 21:29:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-08-04 21:29:33,422 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2019-08-04 21:29:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:33,500 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-08-04 21:29:33,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-08-04 21:29:33,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-08-04 21:29:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:33,502 INFO L225 Difference]: With dead ends: 29 [2019-08-04 21:29:33,502 INFO L226 Difference]: Without dead ends: 29 [2019-08-04 21:29:33,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-08-04 21:29:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-08-04 21:29:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-08-04 21:29:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-08-04 21:29:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-08-04 21:29:33,507 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2019-08-04 21:29:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:33,508 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-08-04 21:29:33,508 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-08-04 21:29:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-08-04 21:29:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-08-04 21:29:33,509 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:33,509 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1] [2019-08-04 21:29:33,509 INFO L418 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash -454857078, now seen corresponding path program 12 times [2019-08-04 21:29:33,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:33,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-08-04 21:29:33,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-08-04 21:29:33,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:33,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-08-04 21:29:33,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-08-04 21:29:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-08-04 21:29:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-08-04 21:29:33,863 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2019-08-04 21:29:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:33,979 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-08-04 21:29:33,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-08-04 21:29:33,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-08-04 21:29:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:33,980 INFO L225 Difference]: With dead ends: 31 [2019-08-04 21:29:33,980 INFO L226 Difference]: Without dead ends: 31 [2019-08-04 21:29:33,980 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-08-04 21:29:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-08-04 21:29:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-08-04 21:29:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-08-04 21:29:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-08-04 21:29:33,984 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2019-08-04 21:29:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:33,984 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-08-04 21:29:33,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-08-04 21:29:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-08-04 21:29:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-08-04 21:29:33,985 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:33,985 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1] [2019-08-04 21:29:33,985 INFO L418 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash -319437323, now seen corresponding path program 13 times [2019-08-04 21:29:33,986 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:34,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2019-08-04 21:29:34,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-08-04 21:29:34,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:34,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-08-04 21:29:34,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-08-04 21:29:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-08-04 21:29:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-08-04 21:29:34,225 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2019-08-04 21:29:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:34,290 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-08-04 21:29:34,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-08-04 21:29:34,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-08-04 21:29:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:34,291 INFO L225 Difference]: With dead ends: 33 [2019-08-04 21:29:34,291 INFO L226 Difference]: Without dead ends: 33 [2019-08-04 21:29:34,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-08-04 21:29:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-08-04 21:29:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-08-04 21:29:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-08-04 21:29:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-08-04 21:29:34,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2019-08-04 21:29:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:34,298 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-08-04 21:29:34,299 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-08-04 21:29:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-08-04 21:29:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-08-04 21:29:34,300 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:34,300 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1] [2019-08-04 21:29:34,300 INFO L418 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 969405866, now seen corresponding path program 14 times [2019-08-04 21:29:34,302 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:34,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2019-08-04 21:29:34,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-08-04 21:29:34,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:34,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-08-04 21:29:34,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-08-04 21:29:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-08-04 21:29:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-08-04 21:29:34,501 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2019-08-04 21:29:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:34,592 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-08-04 21:29:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-08-04 21:29:34,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-08-04 21:29:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:34,594 INFO L225 Difference]: With dead ends: 35 [2019-08-04 21:29:34,594 INFO L226 Difference]: Without dead ends: 35 [2019-08-04 21:29:34,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-08-04 21:29:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-08-04 21:29:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-08-04 21:29:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-08-04 21:29:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-08-04 21:29:34,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2019-08-04 21:29:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:34,599 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-08-04 21:29:34,599 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-08-04 21:29:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-08-04 21:29:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-08-04 21:29:34,600 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:34,600 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1] [2019-08-04 21:29:34,601 INFO L418 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1714035115, now seen corresponding path program 15 times [2019-08-04 21:29:34,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:34,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2019-08-04 21:29:34,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-08-04 21:29:35,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:35,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-08-04 21:29:35,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-08-04 21:29:35,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-08-04 21:29:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-08-04 21:29:35,113 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2019-08-04 21:29:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:35,198 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-08-04 21:29:35,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-08-04 21:29:35,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2019-08-04 21:29:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:35,200 INFO L225 Difference]: With dead ends: 37 [2019-08-04 21:29:35,200 INFO L226 Difference]: Without dead ends: 37 [2019-08-04 21:29:35,201 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-08-04 21:29:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-08-04 21:29:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-08-04 21:29:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-08-04 21:29:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-08-04 21:29:35,204 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2019-08-04 21:29:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:35,205 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-08-04 21:29:35,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-08-04 21:29:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-08-04 21:29:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-08-04 21:29:35,206 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:35,206 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1] [2019-08-04 21:29:35,206 INFO L418 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:35,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash 272417994, now seen corresponding path program 16 times [2019-08-04 21:29:35,207 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:35,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-04 21:29:35,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-08-04 21:29:35,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:35,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-08-04 21:29:35,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-08-04 21:29:35,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-08-04 21:29:35,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-08-04 21:29:35,648 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2019-08-04 21:29:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:35,798 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-08-04 21:29:35,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-08-04 21:29:35,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-08-04 21:29:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:35,800 INFO L225 Difference]: With dead ends: 39 [2019-08-04 21:29:35,801 INFO L226 Difference]: Without dead ends: 39 [2019-08-04 21:29:35,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-08-04 21:29:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-08-04 21:29:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-08-04 21:29:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-08-04 21:29:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-08-04 21:29:35,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2019-08-04 21:29:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:35,806 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-08-04 21:29:35,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-08-04 21:29:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-08-04 21:29:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-08-04 21:29:35,807 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:35,807 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1] [2019-08-04 21:29:35,807 INFO L418 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash -392102219, now seen corresponding path program 17 times [2019-08-04 21:29:35,809 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:35,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2019-08-04 21:29:35,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-08-04 21:29:36,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:36,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-08-04 21:29:36,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-08-04 21:29:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-08-04 21:29:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-08-04 21:29:36,257 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2019-08-04 21:29:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:36,336 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-08-04 21:29:36,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-08-04 21:29:36,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-08-04 21:29:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:36,337 INFO L225 Difference]: With dead ends: 41 [2019-08-04 21:29:36,338 INFO L226 Difference]: Without dead ends: 41 [2019-08-04 21:29:36,338 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-08-04 21:29:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-08-04 21:29:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-08-04 21:29:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-08-04 21:29:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-08-04 21:29:36,342 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2019-08-04 21:29:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:36,342 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-08-04 21:29:36,343 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-08-04 21:29:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-08-04 21:29:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-08-04 21:29:36,343 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:36,343 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1] [2019-08-04 21:29:36,344 INFO L418 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -536355862, now seen corresponding path program 18 times [2019-08-04 21:29:36,345 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:36,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2019-08-04 21:29:36,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-08-04 21:29:36,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:36,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-08-04 21:29:36,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-08-04 21:29:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-08-04 21:29:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-08-04 21:29:36,620 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2019-08-04 21:29:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:36,805 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-08-04 21:29:36,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-08-04 21:29:36,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2019-08-04 21:29:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:36,806 INFO L225 Difference]: With dead ends: 43 [2019-08-04 21:29:36,806 INFO L226 Difference]: Without dead ends: 43 [2019-08-04 21:29:36,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-08-04 21:29:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-08-04 21:29:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-08-04 21:29:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-08-04 21:29:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-08-04 21:29:36,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2019-08-04 21:29:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:36,812 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-08-04 21:29:36,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-08-04 21:29:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-08-04 21:29:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-08-04 21:29:36,813 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:36,813 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1] [2019-08-04 21:29:36,813 INFO L418 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -684650731, now seen corresponding path program 19 times [2019-08-04 21:29:36,815 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:36,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2019-08-04 21:29:36,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-08-04 21:29:37,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:37,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-08-04 21:29:37,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-08-04 21:29:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-08-04 21:29:37,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-08-04 21:29:37,157 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2019-08-04 21:29:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:37,243 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-08-04 21:29:37,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-08-04 21:29:37,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2019-08-04 21:29:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:37,244 INFO L225 Difference]: With dead ends: 45 [2019-08-04 21:29:37,245 INFO L226 Difference]: Without dead ends: 45 [2019-08-04 21:29:37,245 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-08-04 21:29:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-08-04 21:29:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-08-04 21:29:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-08-04 21:29:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-08-04 21:29:37,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2019-08-04 21:29:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:37,253 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-08-04 21:29:37,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-08-04 21:29:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-08-04 21:29:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-08-04 21:29:37,254 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:37,254 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1] [2019-08-04 21:29:37,254 INFO L418 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash 728709898, now seen corresponding path program 20 times [2019-08-04 21:29:37,255 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:37,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2019-08-04 21:29:37,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-08-04 21:29:37,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:37,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-08-04 21:29:37,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-08-04 21:29:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-08-04 21:29:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-08-04 21:29:37,603 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2019-08-04 21:29:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:37,673 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2019-08-04 21:29:37,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-08-04 21:29:37,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-08-04 21:29:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:37,674 INFO L225 Difference]: With dead ends: 47 [2019-08-04 21:29:37,675 INFO L226 Difference]: Without dead ends: 47 [2019-08-04 21:29:37,675 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-08-04 21:29:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-08-04 21:29:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-08-04 21:29:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-08-04 21:29:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-08-04 21:29:37,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2019-08-04 21:29:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:37,680 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-08-04 21:29:37,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-08-04 21:29:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-08-04 21:29:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-08-04 21:29:37,681 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:37,681 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1] [2019-08-04 21:29:37,681 INFO L418 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash 954210165, now seen corresponding path program 21 times [2019-08-04 21:29:37,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:37,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2019-08-04 21:29:37,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-08-04 21:29:38,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:38,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-08-04 21:29:38,031 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-08-04 21:29:38,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-08-04 21:29:38,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-08-04 21:29:38,032 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2019-08-04 21:29:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:38,130 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-08-04 21:29:38,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-08-04 21:29:38,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2019-08-04 21:29:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:38,133 INFO L225 Difference]: With dead ends: 49 [2019-08-04 21:29:38,133 INFO L226 Difference]: Without dead ends: 49 [2019-08-04 21:29:38,134 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-08-04 21:29:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-08-04 21:29:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-08-04 21:29:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-08-04 21:29:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-08-04 21:29:38,137 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2019-08-04 21:29:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:38,138 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-08-04 21:29:38,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-08-04 21:29:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-08-04 21:29:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-08-04 21:29:38,139 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:38,139 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1] [2019-08-04 21:29:38,139 INFO L418 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash -549920214, now seen corresponding path program 22 times [2019-08-04 21:29:38,140 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:38,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjunts are in the unsatisfiable core [2019-08-04 21:29:38,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-08-04 21:29:38,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:38,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-08-04 21:29:38,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-08-04 21:29:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-08-04 21:29:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-08-04 21:29:38,607 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2019-08-04 21:29:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:38,775 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-08-04 21:29:38,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-08-04 21:29:38,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2019-08-04 21:29:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:38,778 INFO L225 Difference]: With dead ends: 51 [2019-08-04 21:29:38,778 INFO L226 Difference]: Without dead ends: 51 [2019-08-04 21:29:38,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-08-04 21:29:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-08-04 21:29:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-08-04 21:29:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-08-04 21:29:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-08-04 21:29:38,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2019-08-04 21:29:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:38,782 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-08-04 21:29:38,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-08-04 21:29:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-08-04 21:29:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-08-04 21:29:38,782 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:38,783 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1] [2019-08-04 21:29:38,783 INFO L418 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1451759573, now seen corresponding path program 23 times [2019-08-04 21:29:38,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:38,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2019-08-04 21:29:38,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-08-04 21:29:40,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:40,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-08-04 21:29:40,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-08-04 21:29:40,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-08-04 21:29:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-08-04 21:29:40,078 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2019-08-04 21:29:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:40,170 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-08-04 21:29:40,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-08-04 21:29:40,173 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2019-08-04 21:29:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:40,174 INFO L225 Difference]: With dead ends: 53 [2019-08-04 21:29:40,174 INFO L226 Difference]: Without dead ends: 53 [2019-08-04 21:29:40,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-08-04 21:29:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-08-04 21:29:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-08-04 21:29:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-08-04 21:29:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-08-04 21:29:40,177 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2019-08-04 21:29:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:40,177 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-08-04 21:29:40,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-08-04 21:29:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-08-04 21:29:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-08-04 21:29:40,178 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:40,178 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1] [2019-08-04 21:29:40,178 INFO L418 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1297428150, now seen corresponding path program 24 times [2019-08-04 21:29:40,179 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:40,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2019-08-04 21:29:40,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-08-04 21:29:40,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:40,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-08-04 21:29:40,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-08-04 21:29:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-08-04 21:29:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-08-04 21:29:40,877 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2019-08-04 21:29:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:41,021 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2019-08-04 21:29:41,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-08-04 21:29:41,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2019-08-04 21:29:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:41,022 INFO L225 Difference]: With dead ends: 55 [2019-08-04 21:29:41,022 INFO L226 Difference]: Without dead ends: 55 [2019-08-04 21:29:41,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-08-04 21:29:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-08-04 21:29:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-08-04 21:29:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-08-04 21:29:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-08-04 21:29:41,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2019-08-04 21:29:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:41,025 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-08-04 21:29:41,025 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-08-04 21:29:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-08-04 21:29:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-08-04 21:29:41,026 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:41,026 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1] [2019-08-04 21:29:41,026 INFO L418 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1904013259, now seen corresponding path program 25 times [2019-08-04 21:29:41,028 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:41,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2019-08-04 21:29:41,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-08-04 21:29:41,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:41,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-08-04 21:29:41,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-08-04 21:29:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-08-04 21:29:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-08-04 21:29:41,499 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2019-08-04 21:29:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:41,586 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-08-04 21:29:41,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-08-04 21:29:41,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2019-08-04 21:29:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:41,588 INFO L225 Difference]: With dead ends: 57 [2019-08-04 21:29:41,588 INFO L226 Difference]: Without dead ends: 57 [2019-08-04 21:29:41,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-08-04 21:29:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-08-04 21:29:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-08-04 21:29:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-08-04 21:29:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-08-04 21:29:41,591 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2019-08-04 21:29:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:41,592 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-08-04 21:29:41,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-08-04 21:29:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-08-04 21:29:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-08-04 21:29:41,593 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:41,593 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1] [2019-08-04 21:29:41,593 INFO L418 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2020931478, now seen corresponding path program 26 times [2019-08-04 21:29:41,594 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:41,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 28 conjunts are in the unsatisfiable core [2019-08-04 21:29:41,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-08-04 21:29:42,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:42,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-08-04 21:29:42,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-08-04 21:29:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-08-04 21:29:42,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-08-04 21:29:42,545 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2019-08-04 21:29:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:42,650 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2019-08-04 21:29:42,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-08-04 21:29:42,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2019-08-04 21:29:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:42,651 INFO L225 Difference]: With dead ends: 59 [2019-08-04 21:29:42,651 INFO L226 Difference]: Without dead ends: 59 [2019-08-04 21:29:42,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-08-04 21:29:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-08-04 21:29:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-08-04 21:29:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-08-04 21:29:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-08-04 21:29:42,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2019-08-04 21:29:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:42,655 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-08-04 21:29:42,655 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-08-04 21:29:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-08-04 21:29:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-08-04 21:29:42,656 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:42,657 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1] [2019-08-04 21:29:42,657 INFO L418 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash -190119787, now seen corresponding path program 27 times [2019-08-04 21:29:42,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:42,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2019-08-04 21:29:42,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-08-04 21:29:43,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:43,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-08-04 21:29:43,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-08-04 21:29:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-08-04 21:29:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-08-04 21:29:43,089 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2019-08-04 21:29:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:43,292 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-08-04 21:29:43,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-08-04 21:29:43,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-08-04 21:29:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:43,293 INFO L225 Difference]: With dead ends: 61 [2019-08-04 21:29:43,293 INFO L226 Difference]: Without dead ends: 61 [2019-08-04 21:29:43,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-08-04 21:29:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-08-04 21:29:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-08-04 21:29:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-08-04 21:29:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-08-04 21:29:43,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2019-08-04 21:29:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:43,297 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-08-04 21:29:43,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-08-04 21:29:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-08-04 21:29:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-08-04 21:29:43,298 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:43,298 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1] [2019-08-04 21:29:43,299 INFO L418 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -903903350, now seen corresponding path program 28 times [2019-08-04 21:29:43,299 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:43,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjunts are in the unsatisfiable core [2019-08-04 21:29:43,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-08-04 21:29:43,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:43,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-08-04 21:29:43,689 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-08-04 21:29:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-08-04 21:29:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-08-04 21:29:43,690 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2019-08-04 21:29:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:43,835 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-08-04 21:29:43,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-08-04 21:29:43,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2019-08-04 21:29:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:43,836 INFO L225 Difference]: With dead ends: 63 [2019-08-04 21:29:43,836 INFO L226 Difference]: Without dead ends: 63 [2019-08-04 21:29:43,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-08-04 21:29:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-08-04 21:29:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-08-04 21:29:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-08-04 21:29:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-08-04 21:29:43,839 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2019-08-04 21:29:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:43,840 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-08-04 21:29:43,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-08-04 21:29:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-08-04 21:29:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-08-04 21:29:43,840 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:43,840 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1] [2019-08-04 21:29:43,841 INFO L418 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash -228988683, now seen corresponding path program 29 times [2019-08-04 21:29:43,842 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:43,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2019-08-04 21:29:43,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-08-04 21:29:44,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:44,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-08-04 21:29:44,420 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-08-04 21:29:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-08-04 21:29:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-08-04 21:29:44,421 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2019-08-04 21:29:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:44,523 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2019-08-04 21:29:44,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-08-04 21:29:44,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2019-08-04 21:29:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:44,525 INFO L225 Difference]: With dead ends: 65 [2019-08-04 21:29:44,525 INFO L226 Difference]: Without dead ends: 65 [2019-08-04 21:29:44,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-08-04 21:29:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-08-04 21:29:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-08-04 21:29:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-08-04 21:29:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-08-04 21:29:44,529 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2019-08-04 21:29:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:44,529 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-08-04 21:29:44,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-08-04 21:29:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-08-04 21:29:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-08-04 21:29:44,530 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:44,530 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1] [2019-08-04 21:29:44,530 INFO L418 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash -785494358, now seen corresponding path program 30 times [2019-08-04 21:29:44,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:44,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 32 conjunts are in the unsatisfiable core [2019-08-04 21:29:44,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-08-04 21:29:44,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:44,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-08-04 21:29:44,976 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-08-04 21:29:44,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-08-04 21:29:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-08-04 21:29:44,977 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2019-08-04 21:29:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:45,142 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-08-04 21:29:45,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-08-04 21:29:45,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2019-08-04 21:29:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:45,144 INFO L225 Difference]: With dead ends: 67 [2019-08-04 21:29:45,144 INFO L226 Difference]: Without dead ends: 67 [2019-08-04 21:29:45,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-08-04 21:29:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-08-04 21:29:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-08-04 21:29:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-08-04 21:29:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2019-08-04 21:29:45,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2019-08-04 21:29:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:45,148 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2019-08-04 21:29:45,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-08-04 21:29:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2019-08-04 21:29:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-08-04 21:29:45,149 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:45,149 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1] [2019-08-04 21:29:45,149 INFO L418 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash -429274795, now seen corresponding path program 31 times [2019-08-04 21:29:45,150 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:45,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2019-08-04 21:29:45,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-08-04 21:29:45,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:45,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-08-04 21:29:45,809 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-08-04 21:29:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-08-04 21:29:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-08-04 21:29:45,810 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2019-08-04 21:29:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:45,938 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-08-04 21:29:45,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-08-04 21:29:45,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2019-08-04 21:29:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:45,945 INFO L225 Difference]: With dead ends: 69 [2019-08-04 21:29:45,945 INFO L226 Difference]: Without dead ends: 69 [2019-08-04 21:29:45,946 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-08-04 21:29:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-08-04 21:29:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-08-04 21:29:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-08-04 21:29:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2019-08-04 21:29:45,947 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2019-08-04 21:29:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:45,948 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2019-08-04 21:29:45,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-08-04 21:29:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2019-08-04 21:29:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-08-04 21:29:45,948 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:45,948 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1] [2019-08-04 21:29:45,948 INFO L418 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1040014794, now seen corresponding path program 32 times [2019-08-04 21:29:45,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:45,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2019-08-04 21:29:45,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-08-04 21:29:46,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:46,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-08-04 21:29:46,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-08-04 21:29:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-08-04 21:29:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-08-04 21:29:46,525 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2019-08-04 21:29:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:46,638 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2019-08-04 21:29:46,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-08-04 21:29:46,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2019-08-04 21:29:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:46,640 INFO L225 Difference]: With dead ends: 71 [2019-08-04 21:29:46,640 INFO L226 Difference]: Without dead ends: 71 [2019-08-04 21:29:46,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-08-04 21:29:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-08-04 21:29:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-08-04 21:29:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-08-04 21:29:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-08-04 21:29:46,644 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2019-08-04 21:29:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:46,644 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-08-04 21:29:46,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-08-04 21:29:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-08-04 21:29:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-08-04 21:29:46,645 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:46,645 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1] [2019-08-04 21:29:46,645 INFO L418 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash -986406475, now seen corresponding path program 33 times [2019-08-04 21:29:46,646 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:46,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 35 conjunts are in the unsatisfiable core [2019-08-04 21:29:46,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-08-04 21:29:47,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:47,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-08-04 21:29:47,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-08-04 21:29:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-08-04 21:29:47,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-08-04 21:29:47,287 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2019-08-04 21:29:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:47,407 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-08-04 21:29:47,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-08-04 21:29:47,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2019-08-04 21:29:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:47,409 INFO L225 Difference]: With dead ends: 73 [2019-08-04 21:29:47,409 INFO L226 Difference]: Without dead ends: 73 [2019-08-04 21:29:47,410 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-08-04 21:29:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-08-04 21:29:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-08-04 21:29:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-08-04 21:29:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-08-04 21:29:47,412 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2019-08-04 21:29:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:47,413 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-08-04 21:29:47,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-08-04 21:29:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-08-04 21:29:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-08-04 21:29:47,413 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:47,414 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1] [2019-08-04 21:29:47,414 INFO L418 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1548924138, now seen corresponding path program 34 times [2019-08-04 21:29:47,415 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:47,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 36 conjunts are in the unsatisfiable core [2019-08-04 21:29:47,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-08-04 21:29:48,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:48,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-08-04 21:29:48,070 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-08-04 21:29:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-08-04 21:29:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-08-04 21:29:48,071 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2019-08-04 21:29:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:48,272 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-08-04 21:29:48,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-08-04 21:29:48,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2019-08-04 21:29:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:48,274 INFO L225 Difference]: With dead ends: 75 [2019-08-04 21:29:48,274 INFO L226 Difference]: Without dead ends: 75 [2019-08-04 21:29:48,275 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-08-04 21:29:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-08-04 21:29:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-08-04 21:29:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-08-04 21:29:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-08-04 21:29:48,278 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2019-08-04 21:29:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:48,278 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-08-04 21:29:48,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-08-04 21:29:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-08-04 21:29:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-08-04 21:29:48,279 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:48,279 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1] [2019-08-04 21:29:48,279 INFO L418 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1198231019, now seen corresponding path program 35 times [2019-08-04 21:29:48,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:48,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 37 conjunts are in the unsatisfiable core [2019-08-04 21:29:48,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-08-04 21:29:49,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:49,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-08-04 21:29:49,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-08-04 21:29:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-08-04 21:29:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-08-04 21:29:49,315 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2019-08-04 21:29:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:49,798 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2019-08-04 21:29:49,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-08-04 21:29:49,799 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2019-08-04 21:29:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:49,800 INFO L225 Difference]: With dead ends: 77 [2019-08-04 21:29:49,800 INFO L226 Difference]: Without dead ends: 77 [2019-08-04 21:29:49,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-08-04 21:29:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-08-04 21:29:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-08-04 21:29:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-08-04 21:29:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-08-04 21:29:49,803 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2019-08-04 21:29:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:49,803 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-08-04 21:29:49,804 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-08-04 21:29:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-08-04 21:29:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-08-04 21:29:49,804 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:49,804 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1] [2019-08-04 21:29:49,805 INFO L418 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2106305526, now seen corresponding path program 36 times [2019-08-04 21:29:49,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:49,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjunts are in the unsatisfiable core [2019-08-04 21:29:49,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-08-04 21:29:50,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:50,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-08-04 21:29:50,664 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-08-04 21:29:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-08-04 21:29:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-08-04 21:29:50,665 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2019-08-04 21:29:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:50,796 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-08-04 21:29:50,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-08-04 21:29:50,796 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2019-08-04 21:29:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:50,797 INFO L225 Difference]: With dead ends: 79 [2019-08-04 21:29:50,797 INFO L226 Difference]: Without dead ends: 79 [2019-08-04 21:29:50,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-08-04 21:29:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-08-04 21:29:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-08-04 21:29:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-08-04 21:29:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2019-08-04 21:29:50,801 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2019-08-04 21:29:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:50,801 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2019-08-04 21:29:50,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-08-04 21:29:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2019-08-04 21:29:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-08-04 21:29:50,802 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:50,802 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1] [2019-08-04 21:29:50,803 INFO L418 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1075627403, now seen corresponding path program 37 times [2019-08-04 21:29:50,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:50,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 39 conjunts are in the unsatisfiable core [2019-08-04 21:29:50,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-08-04 21:29:51,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:51,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-08-04 21:29:51,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-08-04 21:29:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-08-04 21:29:51,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-08-04 21:29:51,453 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2019-08-04 21:29:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:51,591 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-08-04 21:29:51,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-08-04 21:29:51,592 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2019-08-04 21:29:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:51,593 INFO L225 Difference]: With dead ends: 81 [2019-08-04 21:29:51,593 INFO L226 Difference]: Without dead ends: 81 [2019-08-04 21:29:51,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-08-04 21:29:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-08-04 21:29:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-08-04 21:29:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-08-04 21:29:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-08-04 21:29:51,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2019-08-04 21:29:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:51,597 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-08-04 21:29:51,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-08-04 21:29:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-08-04 21:29:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-08-04 21:29:51,598 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:51,598 INFO L399 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1] [2019-08-04 21:29:51,598 INFO L418 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1898461994, now seen corresponding path program 38 times [2019-08-04 21:29:51,599 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:51,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 40 conjunts are in the unsatisfiable core [2019-08-04 21:29:51,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-08-04 21:29:52,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:52,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-08-04 21:29:52,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-08-04 21:29:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-08-04 21:29:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-08-04 21:29:52,350 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2019-08-04 21:29:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:52,487 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2019-08-04 21:29:52,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-08-04 21:29:52,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2019-08-04 21:29:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:52,488 INFO L225 Difference]: With dead ends: 83 [2019-08-04 21:29:52,488 INFO L226 Difference]: Without dead ends: 83 [2019-08-04 21:29:52,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-08-04 21:29:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-08-04 21:29:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-08-04 21:29:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-08-04 21:29:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-08-04 21:29:52,491 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2019-08-04 21:29:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:52,491 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-08-04 21:29:52,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-08-04 21:29:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-08-04 21:29:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-08-04 21:29:52,491 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:52,492 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1] [2019-08-04 21:29:52,492 INFO L418 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1341848277, now seen corresponding path program 39 times [2019-08-04 21:29:52,493 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:52,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 41 conjunts are in the unsatisfiable core [2019-08-04 21:29:52,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-08-04 21:29:53,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:53,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-08-04 21:29:53,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-08-04 21:29:53,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-08-04 21:29:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-08-04 21:29:53,232 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2019-08-04 21:29:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:53,402 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2019-08-04 21:29:53,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-08-04 21:29:53,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2019-08-04 21:29:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:53,404 INFO L225 Difference]: With dead ends: 85 [2019-08-04 21:29:53,404 INFO L226 Difference]: Without dead ends: 85 [2019-08-04 21:29:53,405 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-08-04 21:29:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-08-04 21:29:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-08-04 21:29:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-08-04 21:29:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2019-08-04 21:29:53,408 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2019-08-04 21:29:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:53,408 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2019-08-04 21:29:53,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-08-04 21:29:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2019-08-04 21:29:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-08-04 21:29:53,409 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:53,409 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1] [2019-08-04 21:29:53,409 INFO L418 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1280021942, now seen corresponding path program 40 times [2019-08-04 21:29:53,410 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:53,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 42 conjunts are in the unsatisfiable core [2019-08-04 21:29:53,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2019-08-04 21:29:54,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:54,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-08-04 21:29:54,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-08-04 21:29:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-08-04 21:29:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-08-04 21:29:54,536 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2019-08-04 21:29:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:54,723 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-08-04 21:29:54,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-08-04 21:29:54,724 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2019-08-04 21:29:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:54,725 INFO L225 Difference]: With dead ends: 87 [2019-08-04 21:29:54,725 INFO L226 Difference]: Without dead ends: 87 [2019-08-04 21:29:54,726 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-08-04 21:29:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-08-04 21:29:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-08-04 21:29:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-08-04 21:29:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-08-04 21:29:54,730 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2019-08-04 21:29:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:54,731 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-08-04 21:29:54,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-08-04 21:29:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-08-04 21:29:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-08-04 21:29:54,731 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:54,731 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1] [2019-08-04 21:29:54,732 INFO L418 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -214584523, now seen corresponding path program 41 times [2019-08-04 21:29:54,733 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:54,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 43 conjunts are in the unsatisfiable core [2019-08-04 21:29:54,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-08-04 21:29:55,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:55,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-08-04 21:29:55,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-08-04 21:29:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-08-04 21:29:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-08-04 21:29:55,723 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2019-08-04 21:29:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:55,869 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-08-04 21:29:55,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-08-04 21:29:55,870 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2019-08-04 21:29:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:55,870 INFO L225 Difference]: With dead ends: 89 [2019-08-04 21:29:55,871 INFO L226 Difference]: Without dead ends: 89 [2019-08-04 21:29:55,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-08-04 21:29:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-08-04 21:29:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-08-04 21:29:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-08-04 21:29:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-08-04 21:29:55,875 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2019-08-04 21:29:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:55,875 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-08-04 21:29:55,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-08-04 21:29:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-08-04 21:29:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-08-04 21:29:55,876 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:55,876 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1] [2019-08-04 21:29:55,876 INFO L418 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2170518, now seen corresponding path program 42 times [2019-08-04 21:29:55,877 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:55,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 44 conjunts are in the unsatisfiable core [2019-08-04 21:29:55,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2019-08-04 21:29:57,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:57,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-08-04 21:29:57,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-08-04 21:29:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-08-04 21:29:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-08-04 21:29:57,138 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2019-08-04 21:29:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:57,294 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2019-08-04 21:29:57,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-08-04 21:29:57,295 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2019-08-04 21:29:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:57,296 INFO L225 Difference]: With dead ends: 91 [2019-08-04 21:29:57,296 INFO L226 Difference]: Without dead ends: 91 [2019-08-04 21:29:57,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-08-04 21:29:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-08-04 21:29:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-08-04 21:29:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-08-04 21:29:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2019-08-04 21:29:57,300 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2019-08-04 21:29:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:57,300 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2019-08-04 21:29:57,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-08-04 21:29:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2019-08-04 21:29:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-08-04 21:29:57,300 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:57,300 INFO L399 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1] [2019-08-04 21:29:57,301 INFO L418 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash -378707051, now seen corresponding path program 43 times [2019-08-04 21:29:57,301 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:57,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 45 conjunts are in the unsatisfiable core [2019-08-04 21:29:57,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:29:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-08-04 21:29:58,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:29:58,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-08-04 21:29:58,776 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-08-04 21:29:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-08-04 21:29:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-08-04 21:29:58,777 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2019-08-04 21:29:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:29:58,956 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2019-08-04 21:29:58,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-08-04 21:29:58,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2019-08-04 21:29:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:29:58,958 INFO L225 Difference]: With dead ends: 93 [2019-08-04 21:29:58,958 INFO L226 Difference]: Without dead ends: 93 [2019-08-04 21:29:58,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-08-04 21:29:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-08-04 21:29:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-08-04 21:29:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-08-04 21:29:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2019-08-04 21:29:58,961 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2019-08-04 21:29:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:29:58,961 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2019-08-04 21:29:58,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-08-04 21:29:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2019-08-04 21:29:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-08-04 21:29:58,962 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:29:58,962 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1] [2019-08-04 21:29:58,962 INFO L418 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:29:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:29:58,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1779588982, now seen corresponding path program 44 times [2019-08-04 21:29:58,963 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:29:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:29:58,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 46 conjunts are in the unsatisfiable core [2019-08-04 21:29:58,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-08-04 21:30:00,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:00,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-08-04 21:30:00,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-08-04 21:30:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-08-04 21:30:00,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-08-04 21:30:00,177 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2019-08-04 21:30:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:00,635 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2019-08-04 21:30:00,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-08-04 21:30:00,635 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2019-08-04 21:30:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:00,636 INFO L225 Difference]: With dead ends: 95 [2019-08-04 21:30:00,637 INFO L226 Difference]: Without dead ends: 95 [2019-08-04 21:30:00,637 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-08-04 21:30:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-08-04 21:30:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-08-04 21:30:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-08-04 21:30:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2019-08-04 21:30:00,640 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2019-08-04 21:30:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:00,641 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2019-08-04 21:30:00,641 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-08-04 21:30:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2019-08-04 21:30:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-08-04 21:30:00,642 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:00,642 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1] [2019-08-04 21:30:00,642 INFO L418 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash -939783179, now seen corresponding path program 45 times [2019-08-04 21:30:00,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:00,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 47 conjunts are in the unsatisfiable core [2019-08-04 21:30:00,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-08-04 21:30:01,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:01,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-08-04 21:30:01,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-08-04 21:30:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-08-04 21:30:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-08-04 21:30:01,859 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2019-08-04 21:30:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:02,037 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2019-08-04 21:30:02,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-08-04 21:30:02,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2019-08-04 21:30:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:02,038 INFO L225 Difference]: With dead ends: 97 [2019-08-04 21:30:02,038 INFO L226 Difference]: Without dead ends: 97 [2019-08-04 21:30:02,039 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-08-04 21:30:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-08-04 21:30:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-08-04 21:30:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-08-04 21:30:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2019-08-04 21:30:02,042 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2019-08-04 21:30:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:02,042 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2019-08-04 21:30:02,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-08-04 21:30:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2019-08-04 21:30:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-08-04 21:30:02,043 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:02,043 INFO L399 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1] [2019-08-04 21:30:02,043 INFO L418 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1599690838, now seen corresponding path program 46 times [2019-08-04 21:30:02,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:02,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 48 conjunts are in the unsatisfiable core [2019-08-04 21:30:02,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-08-04 21:30:02,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:02,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-08-04 21:30:02,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-08-04 21:30:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-08-04 21:30:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-08-04 21:30:02,957 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2019-08-04 21:30:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:03,133 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2019-08-04 21:30:03,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-08-04 21:30:03,133 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2019-08-04 21:30:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:03,134 INFO L225 Difference]: With dead ends: 99 [2019-08-04 21:30:03,134 INFO L226 Difference]: Without dead ends: 99 [2019-08-04 21:30:03,135 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-08-04 21:30:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-08-04 21:30:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-08-04 21:30:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-08-04 21:30:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2019-08-04 21:30:03,138 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2019-08-04 21:30:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:03,138 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2019-08-04 21:30:03,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-08-04 21:30:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2019-08-04 21:30:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-08-04 21:30:03,139 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:03,139 INFO L399 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1] [2019-08-04 21:30:03,139 INFO L418 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash 431729749, now seen corresponding path program 47 times [2019-08-04 21:30:03,140 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:03,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 49 conjunts are in the unsatisfiable core [2019-08-04 21:30:03,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2019-08-04 21:30:04,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:04,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-08-04 21:30:04,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-08-04 21:30:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-08-04 21:30:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-08-04 21:30:04,079 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2019-08-04 21:30:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:04,323 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2019-08-04 21:30:04,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-08-04 21:30:04,324 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2019-08-04 21:30:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:04,325 INFO L225 Difference]: With dead ends: 101 [2019-08-04 21:30:04,325 INFO L226 Difference]: Without dead ends: 101 [2019-08-04 21:30:04,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-08-04 21:30:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-08-04 21:30:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-08-04 21:30:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-08-04 21:30:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2019-08-04 21:30:04,330 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2019-08-04 21:30:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:04,330 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2019-08-04 21:30:04,330 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-08-04 21:30:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2019-08-04 21:30:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-08-04 21:30:04,331 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:04,331 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1] [2019-08-04 21:30:04,331 INFO L418 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1789921590, now seen corresponding path program 48 times [2019-08-04 21:30:04,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:04,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 50 conjunts are in the unsatisfiable core [2019-08-04 21:30:04,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2019-08-04 21:30:05,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:05,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-08-04 21:30:05,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-08-04 21:30:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-08-04 21:30:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-08-04 21:30:05,506 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2019-08-04 21:30:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:05,737 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2019-08-04 21:30:05,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-08-04 21:30:05,737 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2019-08-04 21:30:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:05,738 INFO L225 Difference]: With dead ends: 103 [2019-08-04 21:30:05,738 INFO L226 Difference]: Without dead ends: 103 [2019-08-04 21:30:05,739 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-08-04 21:30:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-08-04 21:30:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-08-04 21:30:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-08-04 21:30:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2019-08-04 21:30:05,743 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2019-08-04 21:30:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:05,743 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2019-08-04 21:30:05,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-08-04 21:30:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2019-08-04 21:30:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-08-04 21:30:05,744 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:05,744 INFO L399 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1] [2019-08-04 21:30:05,744 INFO L418 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -16366411, now seen corresponding path program 49 times [2019-08-04 21:30:05,745 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:05,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 51 conjunts are in the unsatisfiable core [2019-08-04 21:30:05,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-08-04 21:30:07,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:07,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-08-04 21:30:07,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-08-04 21:30:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-08-04 21:30:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-08-04 21:30:07,167 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2019-08-04 21:30:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:07,564 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2019-08-04 21:30:07,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-08-04 21:30:07,566 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2019-08-04 21:30:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:07,567 INFO L225 Difference]: With dead ends: 105 [2019-08-04 21:30:07,567 INFO L226 Difference]: Without dead ends: 105 [2019-08-04 21:30:07,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-08-04 21:30:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-08-04 21:30:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-08-04 21:30:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-08-04 21:30:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2019-08-04 21:30:07,571 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2019-08-04 21:30:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:07,572 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2019-08-04 21:30:07,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-08-04 21:30:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2019-08-04 21:30:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-08-04 21:30:07,573 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:07,573 INFO L399 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1] [2019-08-04 21:30:07,574 INFO L418 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1817211414, now seen corresponding path program 50 times [2019-08-04 21:30:07,575 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:07,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 52 conjunts are in the unsatisfiable core [2019-08-04 21:30:07,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-08-04 21:30:09,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:09,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-08-04 21:30:09,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-08-04 21:30:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-08-04 21:30:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-08-04 21:30:09,014 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2019-08-04 21:30:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:09,996 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2019-08-04 21:30:09,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-08-04 21:30:09,997 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2019-08-04 21:30:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:09,998 INFO L225 Difference]: With dead ends: 107 [2019-08-04 21:30:09,998 INFO L226 Difference]: Without dead ends: 107 [2019-08-04 21:30:09,999 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-08-04 21:30:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-08-04 21:30:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-08-04 21:30:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-08-04 21:30:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2019-08-04 21:30:10,001 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2019-08-04 21:30:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:10,002 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2019-08-04 21:30:10,002 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-08-04 21:30:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2019-08-04 21:30:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-08-04 21:30:10,002 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:10,003 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1] [2019-08-04 21:30:10,003 INFO L418 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -843721451, now seen corresponding path program 51 times [2019-08-04 21:30:10,004 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:10,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 53 conjunts are in the unsatisfiable core [2019-08-04 21:30:10,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-08-04 21:30:11,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:11,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-08-04 21:30:11,365 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-08-04 21:30:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-08-04 21:30:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-08-04 21:30:11,365 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2019-08-04 21:30:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:11,582 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2019-08-04 21:30:11,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-08-04 21:30:11,583 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2019-08-04 21:30:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:11,584 INFO L225 Difference]: With dead ends: 109 [2019-08-04 21:30:11,584 INFO L226 Difference]: Without dead ends: 109 [2019-08-04 21:30:11,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-08-04 21:30:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-08-04 21:30:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-08-04 21:30:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-08-04 21:30:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2019-08-04 21:30:11,588 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2019-08-04 21:30:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:11,589 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2019-08-04 21:30:11,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-08-04 21:30:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2019-08-04 21:30:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-08-04 21:30:11,589 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:11,590 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1] [2019-08-04 21:30:11,590 INFO L418 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -972329718, now seen corresponding path program 52 times [2019-08-04 21:30:11,591 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:11,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 54 conjunts are in the unsatisfiable core [2019-08-04 21:30:11,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-08-04 21:30:13,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:13,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-08-04 21:30:13,154 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-08-04 21:30:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-08-04 21:30:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2019-08-04 21:30:13,154 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2019-08-04 21:30:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:13,349 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2019-08-04 21:30:13,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-08-04 21:30:13,350 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2019-08-04 21:30:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:13,351 INFO L225 Difference]: With dead ends: 111 [2019-08-04 21:30:13,351 INFO L226 Difference]: Without dead ends: 111 [2019-08-04 21:30:13,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2019-08-04 21:30:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-08-04 21:30:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-08-04 21:30:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-08-04 21:30:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2019-08-04 21:30:13,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2019-08-04 21:30:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:13,355 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2019-08-04 21:30:13,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-08-04 21:30:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2019-08-04 21:30:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-08-04 21:30:13,356 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:13,356 INFO L399 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1] [2019-08-04 21:30:13,356 INFO L418 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1323016843, now seen corresponding path program 53 times [2019-08-04 21:30:13,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:13,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 55 conjunts are in the unsatisfiable core [2019-08-04 21:30:13,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2019-08-04 21:30:15,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:15,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-08-04 21:30:15,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-08-04 21:30:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-08-04 21:30:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-08-04 21:30:15,200 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2019-08-04 21:30:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:15,412 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2019-08-04 21:30:15,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-08-04 21:30:15,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2019-08-04 21:30:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:15,413 INFO L225 Difference]: With dead ends: 113 [2019-08-04 21:30:15,413 INFO L226 Difference]: Without dead ends: 113 [2019-08-04 21:30:15,414 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-08-04 21:30:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-08-04 21:30:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-08-04 21:30:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-08-04 21:30:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2019-08-04 21:30:15,416 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2019-08-04 21:30:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:15,416 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2019-08-04 21:30:15,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-08-04 21:30:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2019-08-04 21:30:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-08-04 21:30:15,417 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:15,417 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1] [2019-08-04 21:30:15,417 INFO L418 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1054239702, now seen corresponding path program 54 times [2019-08-04 21:30:15,418 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:15,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 56 conjunts are in the unsatisfiable core [2019-08-04 21:30:15,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2019-08-04 21:30:16,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:16,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-08-04 21:30:16,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-08-04 21:30:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-08-04 21:30:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2019-08-04 21:30:16,841 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2019-08-04 21:30:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:17,220 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2019-08-04 21:30:17,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-08-04 21:30:17,220 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2019-08-04 21:30:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:17,221 INFO L225 Difference]: With dead ends: 115 [2019-08-04 21:30:17,222 INFO L226 Difference]: Without dead ends: 115 [2019-08-04 21:30:17,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2019-08-04 21:30:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-08-04 21:30:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-08-04 21:30:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-08-04 21:30:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2019-08-04 21:30:17,224 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2019-08-04 21:30:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:17,225 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2019-08-04 21:30:17,225 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-08-04 21:30:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2019-08-04 21:30:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-08-04 21:30:17,225 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:17,225 INFO L399 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1] [2019-08-04 21:30:17,226 INFO L418 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1244388821, now seen corresponding path program 55 times [2019-08-04 21:30:17,226 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:17,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 57 conjunts are in the unsatisfiable core [2019-08-04 21:30:17,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-08-04 21:30:18,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:18,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-08-04 21:30:18,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-08-04 21:30:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-08-04 21:30:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-08-04 21:30:18,610 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2019-08-04 21:30:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:18,838 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2019-08-04 21:30:18,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-08-04 21:30:18,839 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2019-08-04 21:30:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:18,840 INFO L225 Difference]: With dead ends: 117 [2019-08-04 21:30:18,840 INFO L226 Difference]: Without dead ends: 117 [2019-08-04 21:30:18,841 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-08-04 21:30:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-08-04 21:30:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-08-04 21:30:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-08-04 21:30:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2019-08-04 21:30:18,844 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2019-08-04 21:30:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:18,844 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2019-08-04 21:30:18,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-08-04 21:30:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2019-08-04 21:30:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-08-04 21:30:18,845 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:18,845 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1] [2019-08-04 21:30:18,846 INFO L418 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash -464518326, now seen corresponding path program 56 times [2019-08-04 21:30:18,846 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:18,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 58 conjunts are in the unsatisfiable core [2019-08-04 21:30:18,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2019-08-04 21:30:20,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:20,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-08-04 21:30:20,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-08-04 21:30:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-08-04 21:30:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-08-04 21:30:20,357 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2019-08-04 21:30:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:20,575 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2019-08-04 21:30:20,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-08-04 21:30:20,576 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2019-08-04 21:30:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:20,577 INFO L225 Difference]: With dead ends: 119 [2019-08-04 21:30:20,577 INFO L226 Difference]: Without dead ends: 119 [2019-08-04 21:30:20,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-08-04 21:30:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-08-04 21:30:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-08-04 21:30:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-08-04 21:30:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2019-08-04 21:30:20,580 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2019-08-04 21:30:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:20,581 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2019-08-04 21:30:20,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-08-04 21:30:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2019-08-04 21:30:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-08-04 21:30:20,582 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:20,582 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1] [2019-08-04 21:30:20,582 INFO L418 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1327912501, now seen corresponding path program 57 times [2019-08-04 21:30:20,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:20,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 59 conjunts are in the unsatisfiable core [2019-08-04 21:30:20,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2019-08-04 21:30:21,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:21,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-08-04 21:30:21,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-08-04 21:30:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-08-04 21:30:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2019-08-04 21:30:21,958 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2019-08-04 21:30:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:22,186 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2019-08-04 21:30:22,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-08-04 21:30:22,187 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2019-08-04 21:30:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:22,188 INFO L225 Difference]: With dead ends: 121 [2019-08-04 21:30:22,189 INFO L226 Difference]: Without dead ends: 121 [2019-08-04 21:30:22,189 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2019-08-04 21:30:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-08-04 21:30:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-08-04 21:30:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-08-04 21:30:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2019-08-04 21:30:22,191 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2019-08-04 21:30:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:22,192 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2019-08-04 21:30:22,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-08-04 21:30:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2019-08-04 21:30:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-08-04 21:30:22,193 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:22,193 INFO L399 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1] [2019-08-04 21:30:22,193 INFO L418 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1186678166, now seen corresponding path program 58 times [2019-08-04 21:30:22,194 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:22,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 60 conjunts are in the unsatisfiable core [2019-08-04 21:30:22,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-08-04 21:30:23,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:23,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-08-04 21:30:23,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-08-04 21:30:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-08-04 21:30:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2019-08-04 21:30:23,546 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 61 states. [2019-08-04 21:30:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:23,877 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2019-08-04 21:30:23,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-08-04 21:30:23,877 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2019-08-04 21:30:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:23,878 INFO L225 Difference]: With dead ends: 123 [2019-08-04 21:30:23,878 INFO L226 Difference]: Without dead ends: 123 [2019-08-04 21:30:23,878 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2019-08-04 21:30:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-08-04 21:30:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2019-08-04 21:30:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-08-04 21:30:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2019-08-04 21:30:23,880 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2019-08-04 21:30:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:23,881 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2019-08-04 21:30:23,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-08-04 21:30:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2019-08-04 21:30:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-08-04 21:30:23,882 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:23,882 INFO L399 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1] [2019-08-04 21:30:23,882 INFO L418 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 737003157, now seen corresponding path program 59 times [2019-08-04 21:30:23,883 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:23,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 61 conjunts are in the unsatisfiable core [2019-08-04 21:30:23,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-08-04 21:30:26,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:26,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-08-04 21:30:26,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-08-04 21:30:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-08-04 21:30:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2019-08-04 21:30:26,003 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2019-08-04 21:30:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:26,246 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2019-08-04 21:30:26,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-08-04 21:30:26,247 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2019-08-04 21:30:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:26,248 INFO L225 Difference]: With dead ends: 125 [2019-08-04 21:30:26,248 INFO L226 Difference]: Without dead ends: 125 [2019-08-04 21:30:26,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2019-08-04 21:30:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-08-04 21:30:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-08-04 21:30:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-08-04 21:30:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2019-08-04 21:30:26,251 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2019-08-04 21:30:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:26,251 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2019-08-04 21:30:26,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-08-04 21:30:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2019-08-04 21:30:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-08-04 21:30:26,252 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:26,252 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1] [2019-08-04 21:30:26,253 INFO L418 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1414379914, now seen corresponding path program 60 times [2019-08-04 21:30:26,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:26,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 62 conjunts are in the unsatisfiable core [2019-08-04 21:30:26,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2019-08-04 21:30:27,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:27,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-08-04 21:30:27,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-08-04 21:30:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-08-04 21:30:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-08-04 21:30:27,721 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 63 states. [2019-08-04 21:30:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:27,960 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2019-08-04 21:30:27,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-08-04 21:30:27,961 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2019-08-04 21:30:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:27,962 INFO L225 Difference]: With dead ends: 127 [2019-08-04 21:30:27,962 INFO L226 Difference]: Without dead ends: 127 [2019-08-04 21:30:27,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-08-04 21:30:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-08-04 21:30:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2019-08-04 21:30:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-08-04 21:30:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2019-08-04 21:30:27,965 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2019-08-04 21:30:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:27,965 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2019-08-04 21:30:27,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-08-04 21:30:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2019-08-04 21:30:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-08-04 21:30:27,965 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:27,966 INFO L399 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1] [2019-08-04 21:30:27,966 INFO L418 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1579405579, now seen corresponding path program 61 times [2019-08-04 21:30:27,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:27,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 63 conjunts are in the unsatisfiable core [2019-08-04 21:30:27,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2019-08-04 21:30:29,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:29,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-08-04 21:30:29,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-08-04 21:30:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-08-04 21:30:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-08-04 21:30:29,843 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2019-08-04 21:30:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:30,247 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2019-08-04 21:30:30,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-08-04 21:30:30,247 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2019-08-04 21:30:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:30,248 INFO L225 Difference]: With dead ends: 129 [2019-08-04 21:30:30,248 INFO L226 Difference]: Without dead ends: 129 [2019-08-04 21:30:30,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-08-04 21:30:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-08-04 21:30:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2019-08-04 21:30:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-08-04 21:30:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2019-08-04 21:30:30,251 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2019-08-04 21:30:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:30,252 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2019-08-04 21:30:30,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-08-04 21:30:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2019-08-04 21:30:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-08-04 21:30:30,252 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:30,253 INFO L399 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1] [2019-08-04 21:30:30,253 INFO L418 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1271856982, now seen corresponding path program 62 times [2019-08-04 21:30:30,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:30,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 64 conjunts are in the unsatisfiable core [2019-08-04 21:30:30,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-08-04 21:30:31,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:31,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-08-04 21:30:31,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-08-04 21:30:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-08-04 21:30:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2019-08-04 21:30:31,754 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 65 states. [2019-08-04 21:30:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:32,009 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2019-08-04 21:30:32,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-08-04 21:30:32,009 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2019-08-04 21:30:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:32,010 INFO L225 Difference]: With dead ends: 131 [2019-08-04 21:30:32,010 INFO L226 Difference]: Without dead ends: 131 [2019-08-04 21:30:32,011 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2019-08-04 21:30:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-08-04 21:30:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2019-08-04 21:30:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-08-04 21:30:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2019-08-04 21:30:32,014 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2019-08-04 21:30:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:32,014 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2019-08-04 21:30:32,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-08-04 21:30:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2019-08-04 21:30:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-08-04 21:30:32,015 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:32,015 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1] [2019-08-04 21:30:32,015 INFO L418 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1741393749, now seen corresponding path program 63 times [2019-08-04 21:30:32,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:32,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 65 conjunts are in the unsatisfiable core [2019-08-04 21:30:32,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2019-08-04 21:30:33,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:33,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-08-04 21:30:33,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-08-04 21:30:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-08-04 21:30:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2019-08-04 21:30:33,572 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2019-08-04 21:30:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:33,837 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2019-08-04 21:30:33,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-08-04 21:30:33,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2019-08-04 21:30:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:33,838 INFO L225 Difference]: With dead ends: 133 [2019-08-04 21:30:33,838 INFO L226 Difference]: Without dead ends: 133 [2019-08-04 21:30:33,839 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2019-08-04 21:30:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-08-04 21:30:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-08-04 21:30:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-08-04 21:30:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2019-08-04 21:30:33,841 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2019-08-04 21:30:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:33,841 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2019-08-04 21:30:33,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-08-04 21:30:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2019-08-04 21:30:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-08-04 21:30:33,842 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:33,842 INFO L399 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1] [2019-08-04 21:30:33,842 INFO L418 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash 573870026, now seen corresponding path program 64 times [2019-08-04 21:30:33,843 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:33,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 66 conjunts are in the unsatisfiable core [2019-08-04 21:30:33,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2019-08-04 21:30:35,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:35,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-08-04 21:30:35,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-08-04 21:30:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-08-04 21:30:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2019-08-04 21:30:35,828 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 67 states. [2019-08-04 21:30:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:36,127 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2019-08-04 21:30:36,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-08-04 21:30:36,127 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2019-08-04 21:30:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:36,128 INFO L225 Difference]: With dead ends: 135 [2019-08-04 21:30:36,128 INFO L226 Difference]: Without dead ends: 135 [2019-08-04 21:30:36,129 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2019-08-04 21:30:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-08-04 21:30:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-08-04 21:30:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-08-04 21:30:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2019-08-04 21:30:36,132 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2019-08-04 21:30:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:36,132 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2019-08-04 21:30:36,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-08-04 21:30:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2019-08-04 21:30:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-08-04 21:30:36,133 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:36,133 INFO L399 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1] [2019-08-04 21:30:36,133 INFO L418 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -904534091, now seen corresponding path program 65 times [2019-08-04 21:30:36,134 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:36,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 67 conjunts are in the unsatisfiable core [2019-08-04 21:30:36,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2019-08-04 21:30:37,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:37,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-08-04 21:30:37,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-08-04 21:30:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-08-04 21:30:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2019-08-04 21:30:37,720 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2019-08-04 21:30:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:38,398 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2019-08-04 21:30:38,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-08-04 21:30:38,398 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2019-08-04 21:30:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:38,399 INFO L225 Difference]: With dead ends: 137 [2019-08-04 21:30:38,399 INFO L226 Difference]: Without dead ends: 137 [2019-08-04 21:30:38,400 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2019-08-04 21:30:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-08-04 21:30:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-08-04 21:30:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-08-04 21:30:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2019-08-04 21:30:38,403 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2019-08-04 21:30:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:38,404 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2019-08-04 21:30:38,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-08-04 21:30:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2019-08-04 21:30:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-08-04 21:30:38,405 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:38,405 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1] [2019-08-04 21:30:38,405 INFO L418 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1843501334, now seen corresponding path program 66 times [2019-08-04 21:30:38,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:38,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 68 conjunts are in the unsatisfiable core [2019-08-04 21:30:38,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2019-08-04 21:30:40,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:40,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-08-04 21:30:40,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-08-04 21:30:40,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-08-04 21:30:40,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2019-08-04 21:30:40,083 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 69 states. [2019-08-04 21:30:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:40,595 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2019-08-04 21:30:40,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-08-04 21:30:40,596 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2019-08-04 21:30:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:40,597 INFO L225 Difference]: With dead ends: 139 [2019-08-04 21:30:40,597 INFO L226 Difference]: Without dead ends: 139 [2019-08-04 21:30:40,597 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2019-08-04 21:30:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-08-04 21:30:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-08-04 21:30:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-08-04 21:30:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2019-08-04 21:30:40,600 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2019-08-04 21:30:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:40,600 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2019-08-04 21:30:40,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-08-04 21:30:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2019-08-04 21:30:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-08-04 21:30:40,601 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:40,601 INFO L399 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1] [2019-08-04 21:30:40,601 INFO L418 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1251293205, now seen corresponding path program 67 times [2019-08-04 21:30:40,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:40,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 69 conjunts are in the unsatisfiable core [2019-08-04 21:30:40,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2019-08-04 21:30:42,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:42,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-08-04 21:30:42,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-08-04 21:30:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-08-04 21:30:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2019-08-04 21:30:42,349 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2019-08-04 21:30:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:42,733 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2019-08-04 21:30:42,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-08-04 21:30:42,734 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2019-08-04 21:30:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:42,735 INFO L225 Difference]: With dead ends: 141 [2019-08-04 21:30:42,735 INFO L226 Difference]: Without dead ends: 141 [2019-08-04 21:30:42,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2019-08-04 21:30:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-08-04 21:30:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-08-04 21:30:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-08-04 21:30:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2019-08-04 21:30:42,738 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2019-08-04 21:30:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:42,739 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2019-08-04 21:30:42,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-08-04 21:30:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2019-08-04 21:30:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-08-04 21:30:42,739 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:42,739 INFO L399 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1] [2019-08-04 21:30:42,740 INFO L418 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash 36996618, now seen corresponding path program 68 times [2019-08-04 21:30:42,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:42,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 70 conjunts are in the unsatisfiable core [2019-08-04 21:30:42,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2019-08-04 21:30:44,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:44,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-08-04 21:30:44,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-08-04 21:30:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-08-04 21:30:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2019-08-04 21:30:44,533 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 71 states. [2019-08-04 21:30:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:44,852 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2019-08-04 21:30:44,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-08-04 21:30:44,852 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2019-08-04 21:30:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:44,853 INFO L225 Difference]: With dead ends: 143 [2019-08-04 21:30:44,853 INFO L226 Difference]: Without dead ends: 143 [2019-08-04 21:30:44,853 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2019-08-04 21:30:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-08-04 21:30:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2019-08-04 21:30:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-08-04 21:30:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2019-08-04 21:30:44,855 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2019-08-04 21:30:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:44,855 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2019-08-04 21:30:44,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-08-04 21:30:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2019-08-04 21:30:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-08-04 21:30:44,856 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:44,856 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1] [2019-08-04 21:30:44,856 INFO L418 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1084457077, now seen corresponding path program 69 times [2019-08-04 21:30:44,857 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:44,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 71 conjunts are in the unsatisfiable core [2019-08-04 21:30:44,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2019-08-04 21:30:46,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:46,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-08-04 21:30:46,955 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-08-04 21:30:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-08-04 21:30:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2019-08-04 21:30:46,955 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2019-08-04 21:30:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:47,303 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2019-08-04 21:30:47,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-08-04 21:30:47,304 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2019-08-04 21:30:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:47,305 INFO L225 Difference]: With dead ends: 145 [2019-08-04 21:30:47,305 INFO L226 Difference]: Without dead ends: 145 [2019-08-04 21:30:47,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2019-08-04 21:30:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-08-04 21:30:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2019-08-04 21:30:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-08-04 21:30:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2019-08-04 21:30:47,308 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2019-08-04 21:30:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:47,309 INFO L475 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2019-08-04 21:30:47,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-08-04 21:30:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2019-08-04 21:30:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-08-04 21:30:47,310 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:47,310 INFO L399 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1] [2019-08-04 21:30:47,310 INFO L418 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash -616764118, now seen corresponding path program 70 times [2019-08-04 21:30:47,311 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:47,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 72 conjunts are in the unsatisfiable core [2019-08-04 21:30:47,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2019-08-04 21:30:49,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:49,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-08-04 21:30:49,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-08-04 21:30:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-08-04 21:30:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2019-08-04 21:30:49,319 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 73 states. [2019-08-04 21:30:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:49,648 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2019-08-04 21:30:49,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-08-04 21:30:49,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2019-08-04 21:30:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:49,649 INFO L225 Difference]: With dead ends: 147 [2019-08-04 21:30:49,650 INFO L226 Difference]: Without dead ends: 147 [2019-08-04 21:30:49,650 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2019-08-04 21:30:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-08-04 21:30:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2019-08-04 21:30:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-08-04 21:30:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2019-08-04 21:30:49,653 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2019-08-04 21:30:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:49,653 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2019-08-04 21:30:49,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-08-04 21:30:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2019-08-04 21:30:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-08-04 21:30:49,654 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:49,654 INFO L399 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1] [2019-08-04 21:30:49,655 INFO L418 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2031796437, now seen corresponding path program 71 times [2019-08-04 21:30:49,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:49,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 73 conjunts are in the unsatisfiable core [2019-08-04 21:30:49,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2019-08-04 21:30:52,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:52,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-08-04 21:30:52,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-08-04 21:30:52,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-08-04 21:30:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2019-08-04 21:30:52,143 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2019-08-04 21:30:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:52,497 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2019-08-04 21:30:52,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-08-04 21:30:52,497 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2019-08-04 21:30:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:52,499 INFO L225 Difference]: With dead ends: 149 [2019-08-04 21:30:52,499 INFO L226 Difference]: Without dead ends: 149 [2019-08-04 21:30:52,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2019-08-04 21:30:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-08-04 21:30:52,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-08-04 21:30:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-08-04 21:30:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2019-08-04 21:30:52,503 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2019-08-04 21:30:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:52,503 INFO L475 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2019-08-04 21:30:52,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-08-04 21:30:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2019-08-04 21:30:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-08-04 21:30:52,504 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:52,504 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1] [2019-08-04 21:30:52,504 INFO L418 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1350409290, now seen corresponding path program 72 times [2019-08-04 21:30:52,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:52,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 74 conjunts are in the unsatisfiable core [2019-08-04 21:30:52,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2019-08-04 21:30:54,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:54,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-08-04 21:30:54,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-08-04 21:30:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-08-04 21:30:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2019-08-04 21:30:54,524 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 75 states. [2019-08-04 21:30:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:54,897 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2019-08-04 21:30:54,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-08-04 21:30:54,902 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2019-08-04 21:30:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:54,903 INFO L225 Difference]: With dead ends: 151 [2019-08-04 21:30:54,903 INFO L226 Difference]: Without dead ends: 151 [2019-08-04 21:30:54,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2019-08-04 21:30:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-08-04 21:30:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-08-04 21:30:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-08-04 21:30:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2019-08-04 21:30:54,906 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2019-08-04 21:30:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:54,906 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2019-08-04 21:30:54,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-08-04 21:30:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2019-08-04 21:30:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-08-04 21:30:54,907 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:54,907 INFO L399 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1] [2019-08-04 21:30:54,908 INFO L418 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash -699074251, now seen corresponding path program 73 times [2019-08-04 21:30:54,908 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:54,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 75 conjunts are in the unsatisfiable core [2019-08-04 21:30:54,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:30:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2019-08-04 21:30:57,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:30:57,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-08-04 21:30:57,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-08-04 21:30:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-08-04 21:30:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2019-08-04 21:30:57,243 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2019-08-04 21:30:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:30:57,709 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2019-08-04 21:30:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-08-04 21:30:57,709 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2019-08-04 21:30:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:30:57,710 INFO L225 Difference]: With dead ends: 153 [2019-08-04 21:30:57,711 INFO L226 Difference]: Without dead ends: 153 [2019-08-04 21:30:57,711 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2019-08-04 21:30:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-08-04 21:30:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2019-08-04 21:30:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-08-04 21:30:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2019-08-04 21:30:57,714 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2019-08-04 21:30:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:30:57,714 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2019-08-04 21:30:57,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-08-04 21:30:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2019-08-04 21:30:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-08-04 21:30:57,715 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:30:57,715 INFO L399 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1] [2019-08-04 21:30:57,716 INFO L418 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:30:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:30:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1078160534, now seen corresponding path program 74 times [2019-08-04 21:30:57,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:30:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:30:57,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 76 conjunts are in the unsatisfiable core [2019-08-04 21:30:57,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2019-08-04 21:31:00,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:00,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-08-04 21:31:00,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-08-04 21:31:00,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-08-04 21:31:00,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2019-08-04 21:31:00,208 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 77 states. [2019-08-04 21:31:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:00,680 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2019-08-04 21:31:00,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-08-04 21:31:00,681 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2019-08-04 21:31:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:00,681 INFO L225 Difference]: With dead ends: 155 [2019-08-04 21:31:00,681 INFO L226 Difference]: Without dead ends: 155 [2019-08-04 21:31:00,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2019-08-04 21:31:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-08-04 21:31:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2019-08-04 21:31:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-08-04 21:31:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2019-08-04 21:31:00,685 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2019-08-04 21:31:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:00,685 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2019-08-04 21:31:00,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-08-04 21:31:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2019-08-04 21:31:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-08-04 21:31:00,686 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:00,686 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1] [2019-08-04 21:31:00,687 INFO L418 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash -265541227, now seen corresponding path program 75 times [2019-08-04 21:31:00,688 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:00,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 77 conjunts are in the unsatisfiable core [2019-08-04 21:31:00,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2019-08-04 21:31:03,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:03,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-08-04 21:31:03,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-08-04 21:31:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-08-04 21:31:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2019-08-04 21:31:03,255 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2019-08-04 21:31:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:03,674 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2019-08-04 21:31:03,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-08-04 21:31:03,675 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2019-08-04 21:31:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:03,676 INFO L225 Difference]: With dead ends: 157 [2019-08-04 21:31:03,676 INFO L226 Difference]: Without dead ends: 157 [2019-08-04 21:31:03,677 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2019-08-04 21:31:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-08-04 21:31:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-08-04 21:31:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-08-04 21:31:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2019-08-04 21:31:03,680 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2019-08-04 21:31:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:03,680 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2019-08-04 21:31:03,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-08-04 21:31:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2019-08-04 21:31:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-08-04 21:31:03,681 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:03,681 INFO L399 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1] [2019-08-04 21:31:03,681 INFO L418 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 289395338, now seen corresponding path program 76 times [2019-08-04 21:31:03,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:03,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 78 conjunts are in the unsatisfiable core [2019-08-04 21:31:03,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2019-08-04 21:31:06,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:06,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-08-04 21:31:06,047 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-08-04 21:31:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-08-04 21:31:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-08-04 21:31:06,048 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 79 states. [2019-08-04 21:31:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:06,511 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2019-08-04 21:31:06,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-08-04 21:31:06,511 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2019-08-04 21:31:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:06,513 INFO L225 Difference]: With dead ends: 159 [2019-08-04 21:31:06,513 INFO L226 Difference]: Without dead ends: 159 [2019-08-04 21:31:06,513 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-08-04 21:31:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-08-04 21:31:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2019-08-04 21:31:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-08-04 21:31:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2019-08-04 21:31:06,516 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2019-08-04 21:31:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:06,516 INFO L475 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2019-08-04 21:31:06,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-08-04 21:31:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2019-08-04 21:31:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-08-04 21:31:06,517 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:06,517 INFO L399 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1] [2019-08-04 21:31:06,518 INFO L418 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1275440651, now seen corresponding path program 77 times [2019-08-04 21:31:06,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:06,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 79 conjunts are in the unsatisfiable core [2019-08-04 21:31:06,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2019-08-04 21:31:08,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:08,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-08-04 21:31:08,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-08-04 21:31:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-08-04 21:31:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2019-08-04 21:31:08,875 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2019-08-04 21:31:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:09,308 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2019-08-04 21:31:09,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-08-04 21:31:09,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2019-08-04 21:31:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:09,310 INFO L225 Difference]: With dead ends: 161 [2019-08-04 21:31:09,310 INFO L226 Difference]: Without dead ends: 161 [2019-08-04 21:31:09,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2019-08-04 21:31:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-08-04 21:31:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2019-08-04 21:31:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-08-04 21:31:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2019-08-04 21:31:09,314 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2019-08-04 21:31:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:09,314 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2019-08-04 21:31:09,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-08-04 21:31:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2019-08-04 21:31:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-08-04 21:31:09,315 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:09,315 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1] [2019-08-04 21:31:09,316 INFO L418 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash 399333802, now seen corresponding path program 78 times [2019-08-04 21:31:09,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:09,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 80 conjunts are in the unsatisfiable core [2019-08-04 21:31:09,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2019-08-04 21:31:11,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:11,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-08-04 21:31:11,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-08-04 21:31:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-08-04 21:31:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-08-04 21:31:11,793 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 81 states. [2019-08-04 21:31:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:12,249 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2019-08-04 21:31:12,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-08-04 21:31:12,250 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2019-08-04 21:31:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:12,251 INFO L225 Difference]: With dead ends: 163 [2019-08-04 21:31:12,251 INFO L226 Difference]: Without dead ends: 163 [2019-08-04 21:31:12,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-08-04 21:31:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-08-04 21:31:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2019-08-04 21:31:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-08-04 21:31:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2019-08-04 21:31:12,254 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2019-08-04 21:31:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:12,254 INFO L475 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2019-08-04 21:31:12,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-08-04 21:31:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2019-08-04 21:31:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-08-04 21:31:12,255 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:12,255 INFO L399 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1] [2019-08-04 21:31:12,255 INFO L418 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 77165141, now seen corresponding path program 79 times [2019-08-04 21:31:12,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:12,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 81 conjunts are in the unsatisfiable core [2019-08-04 21:31:12,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2019-08-04 21:31:14,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:14,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-08-04 21:31:14,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-08-04 21:31:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-08-04 21:31:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2019-08-04 21:31:14,576 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2019-08-04 21:31:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:15,066 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2019-08-04 21:31:15,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-08-04 21:31:15,067 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2019-08-04 21:31:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:15,067 INFO L225 Difference]: With dead ends: 165 [2019-08-04 21:31:15,067 INFO L226 Difference]: Without dead ends: 165 [2019-08-04 21:31:15,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2019-08-04 21:31:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-08-04 21:31:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2019-08-04 21:31:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-08-04 21:31:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2019-08-04 21:31:15,069 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2019-08-04 21:31:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:15,070 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2019-08-04 21:31:15,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-08-04 21:31:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2019-08-04 21:31:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-08-04 21:31:15,071 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:15,071 INFO L399 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1] [2019-08-04 21:31:15,071 INFO L418 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash -257218358, now seen corresponding path program 80 times [2019-08-04 21:31:15,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:15,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 82 conjunts are in the unsatisfiable core [2019-08-04 21:31:15,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2019-08-04 21:31:17,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:17,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-08-04 21:31:17,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-08-04 21:31:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-08-04 21:31:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2019-08-04 21:31:17,725 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 83 states. [2019-08-04 21:31:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:18,223 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2019-08-04 21:31:18,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-08-04 21:31:18,223 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2019-08-04 21:31:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:18,225 INFO L225 Difference]: With dead ends: 167 [2019-08-04 21:31:18,225 INFO L226 Difference]: Without dead ends: 167 [2019-08-04 21:31:18,225 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2019-08-04 21:31:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-08-04 21:31:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2019-08-04 21:31:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-08-04 21:31:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2019-08-04 21:31:18,227 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2019-08-04 21:31:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:18,227 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2019-08-04 21:31:18,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-08-04 21:31:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2019-08-04 21:31:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-08-04 21:31:18,228 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:18,228 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1] [2019-08-04 21:31:18,228 INFO L418 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1516473013, now seen corresponding path program 81 times [2019-08-04 21:31:18,229 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:18,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 83 conjunts are in the unsatisfiable core [2019-08-04 21:31:18,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2019-08-04 21:31:20,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:20,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-08-04 21:31:20,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-08-04 21:31:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-08-04 21:31:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2019-08-04 21:31:20,616 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2019-08-04 21:31:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:21,253 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2019-08-04 21:31:21,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-08-04 21:31:21,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2019-08-04 21:31:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:21,254 INFO L225 Difference]: With dead ends: 169 [2019-08-04 21:31:21,254 INFO L226 Difference]: Without dead ends: 169 [2019-08-04 21:31:21,255 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2019-08-04 21:31:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-08-04 21:31:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2019-08-04 21:31:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-08-04 21:31:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2019-08-04 21:31:21,257 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2019-08-04 21:31:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:21,257 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2019-08-04 21:31:21,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-08-04 21:31:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2019-08-04 21:31:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-08-04 21:31:21,258 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:21,258 INFO L399 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1] [2019-08-04 21:31:21,258 INFO L418 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1671380970, now seen corresponding path program 82 times [2019-08-04 21:31:21,259 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:21,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 84 conjunts are in the unsatisfiable core [2019-08-04 21:31:21,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2019-08-04 21:31:23,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:23,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-08-04 21:31:23,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-08-04 21:31:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-08-04 21:31:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2019-08-04 21:31:23,785 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 85 states. [2019-08-04 21:31:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:24,315 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2019-08-04 21:31:24,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-08-04 21:31:24,315 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2019-08-04 21:31:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:24,316 INFO L225 Difference]: With dead ends: 171 [2019-08-04 21:31:24,316 INFO L226 Difference]: Without dead ends: 171 [2019-08-04 21:31:24,316 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2019-08-04 21:31:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-08-04 21:31:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2019-08-04 21:31:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-08-04 21:31:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2019-08-04 21:31:24,318 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2019-08-04 21:31:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:24,319 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2019-08-04 21:31:24,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-08-04 21:31:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2019-08-04 21:31:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-08-04 21:31:24,320 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:24,320 INFO L399 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1] [2019-08-04 21:31:24,320 INFO L418 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1664260885, now seen corresponding path program 83 times [2019-08-04 21:31:24,321 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:24,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 85 conjunts are in the unsatisfiable core [2019-08-04 21:31:24,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2019-08-04 21:31:26,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:26,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-08-04 21:31:26,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-08-04 21:31:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-08-04 21:31:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-08-04 21:31:26,935 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2019-08-04 21:31:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:27,472 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2019-08-04 21:31:27,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-08-04 21:31:27,472 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2019-08-04 21:31:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:27,473 INFO L225 Difference]: With dead ends: 173 [2019-08-04 21:31:27,473 INFO L226 Difference]: Without dead ends: 173 [2019-08-04 21:31:27,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-08-04 21:31:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-08-04 21:31:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2019-08-04 21:31:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-08-04 21:31:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2019-08-04 21:31:27,476 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2019-08-04 21:31:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:27,476 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2019-08-04 21:31:27,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-08-04 21:31:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2019-08-04 21:31:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-08-04 21:31:27,478 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:27,478 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1] [2019-08-04 21:31:27,478 INFO L418 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1123000074, now seen corresponding path program 84 times [2019-08-04 21:31:27,479 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:27,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 86 conjunts are in the unsatisfiable core [2019-08-04 21:31:27,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2019-08-04 21:31:30,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:30,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-08-04 21:31:30,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-08-04 21:31:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-08-04 21:31:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-08-04 21:31:30,210 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 87 states. [2019-08-04 21:31:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:30,770 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2019-08-04 21:31:30,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-08-04 21:31:30,770 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2019-08-04 21:31:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:30,771 INFO L225 Difference]: With dead ends: 175 [2019-08-04 21:31:30,771 INFO L226 Difference]: Without dead ends: 175 [2019-08-04 21:31:30,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-08-04 21:31:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-08-04 21:31:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-08-04 21:31:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-08-04 21:31:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2019-08-04 21:31:30,775 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2019-08-04 21:31:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:30,775 INFO L475 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2019-08-04 21:31:30,775 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-08-04 21:31:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2019-08-04 21:31:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-08-04 21:31:30,776 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:30,776 INFO L399 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1] [2019-08-04 21:31:30,776 INFO L418 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1570725003, now seen corresponding path program 85 times [2019-08-04 21:31:30,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:30,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 87 conjunts are in the unsatisfiable core [2019-08-04 21:31:30,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2019-08-04 21:31:33,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:33,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-08-04 21:31:33,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-08-04 21:31:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-08-04 21:31:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-08-04 21:31:33,657 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2019-08-04 21:31:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:34,244 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2019-08-04 21:31:34,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-08-04 21:31:34,244 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2019-08-04 21:31:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:34,245 INFO L225 Difference]: With dead ends: 177 [2019-08-04 21:31:34,245 INFO L226 Difference]: Without dead ends: 177 [2019-08-04 21:31:34,246 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-08-04 21:31:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-08-04 21:31:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-08-04 21:31:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-08-04 21:31:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2019-08-04 21:31:34,248 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2019-08-04 21:31:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:34,249 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2019-08-04 21:31:34,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-08-04 21:31:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2019-08-04 21:31:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-08-04 21:31:34,250 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:34,250 INFO L399 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1] [2019-08-04 21:31:34,250 INFO L418 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash -882751958, now seen corresponding path program 86 times [2019-08-04 21:31:34,251 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:34,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 88 conjunts are in the unsatisfiable core [2019-08-04 21:31:34,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2019-08-04 21:31:37,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:37,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-08-04 21:31:37,158 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-08-04 21:31:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-08-04 21:31:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-08-04 21:31:37,160 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 89 states. [2019-08-04 21:31:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:37,796 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2019-08-04 21:31:37,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-08-04 21:31:37,797 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2019-08-04 21:31:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:37,798 INFO L225 Difference]: With dead ends: 179 [2019-08-04 21:31:37,798 INFO L226 Difference]: Without dead ends: 179 [2019-08-04 21:31:37,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-08-04 21:31:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-08-04 21:31:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2019-08-04 21:31:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-08-04 21:31:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2019-08-04 21:31:37,800 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2019-08-04 21:31:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:37,800 INFO L475 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2019-08-04 21:31:37,800 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-08-04 21:31:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2019-08-04 21:31:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-08-04 21:31:37,801 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:37,801 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1] [2019-08-04 21:31:37,801 INFO L418 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 281519061, now seen corresponding path program 87 times [2019-08-04 21:31:37,802 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:37,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 89 conjunts are in the unsatisfiable core [2019-08-04 21:31:37,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2019-08-04 21:31:40,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:40,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-08-04 21:31:40,553 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-08-04 21:31:40,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-08-04 21:31:40,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-08-04 21:31:40,554 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2019-08-04 21:31:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:41,178 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2019-08-04 21:31:41,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-08-04 21:31:41,178 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2019-08-04 21:31:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:41,179 INFO L225 Difference]: With dead ends: 181 [2019-08-04 21:31:41,179 INFO L226 Difference]: Without dead ends: 181 [2019-08-04 21:31:41,179 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-08-04 21:31:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-08-04 21:31:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2019-08-04 21:31:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-08-04 21:31:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2019-08-04 21:31:41,182 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2019-08-04 21:31:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:41,183 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2019-08-04 21:31:41,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-08-04 21:31:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2019-08-04 21:31:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-08-04 21:31:41,184 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:41,184 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1] [2019-08-04 21:31:41,184 INFO L418 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash 71120202, now seen corresponding path program 88 times [2019-08-04 21:31:41,185 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:41,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 90 conjunts are in the unsatisfiable core [2019-08-04 21:31:41,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2019-08-04 21:31:44,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:44,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-08-04 21:31:44,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-08-04 21:31:44,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-08-04 21:31:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-08-04 21:31:44,327 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 91 states. [2019-08-04 21:31:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:44,977 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2019-08-04 21:31:44,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-08-04 21:31:44,978 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2019-08-04 21:31:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:44,979 INFO L225 Difference]: With dead ends: 183 [2019-08-04 21:31:44,979 INFO L226 Difference]: Without dead ends: 183 [2019-08-04 21:31:44,980 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-08-04 21:31:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-08-04 21:31:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2019-08-04 21:31:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-08-04 21:31:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2019-08-04 21:31:44,982 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2019-08-04 21:31:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:44,982 INFO L475 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2019-08-04 21:31:44,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-08-04 21:31:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2019-08-04 21:31:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-08-04 21:31:44,983 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:44,983 INFO L399 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1] [2019-08-04 21:31:44,983 INFO L418 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1128162251, now seen corresponding path program 89 times [2019-08-04 21:31:44,984 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:45,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 91 conjunts are in the unsatisfiable core [2019-08-04 21:31:45,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2019-08-04 21:31:48,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:48,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-08-04 21:31:48,028 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-08-04 21:31:48,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-08-04 21:31:48,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-08-04 21:31:48,029 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2019-08-04 21:31:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:48,733 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2019-08-04 21:31:48,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-08-04 21:31:48,734 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2019-08-04 21:31:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:48,735 INFO L225 Difference]: With dead ends: 185 [2019-08-04 21:31:48,735 INFO L226 Difference]: Without dead ends: 185 [2019-08-04 21:31:48,735 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-08-04 21:31:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-08-04 21:31:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2019-08-04 21:31:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-08-04 21:31:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2019-08-04 21:31:48,737 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2019-08-04 21:31:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:48,738 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2019-08-04 21:31:48,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-08-04 21:31:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2019-08-04 21:31:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-08-04 21:31:48,739 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:48,739 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1] [2019-08-04 21:31:48,739 INFO L418 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:48,739 INFO L82 PathProgramCache]: Analyzing trace with hash 524708970, now seen corresponding path program 90 times [2019-08-04 21:31:48,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:48,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 92 conjunts are in the unsatisfiable core [2019-08-04 21:31:48,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2019-08-04 21:31:51,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:51,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-08-04 21:31:51,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-08-04 21:31:51,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-08-04 21:31:51,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-08-04 21:31:51,708 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 93 states. [2019-08-04 21:31:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:52,539 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2019-08-04 21:31:52,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-08-04 21:31:52,539 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2019-08-04 21:31:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:52,541 INFO L225 Difference]: With dead ends: 187 [2019-08-04 21:31:52,541 INFO L226 Difference]: Without dead ends: 187 [2019-08-04 21:31:52,541 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-08-04 21:31:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-08-04 21:31:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2019-08-04 21:31:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-08-04 21:31:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2019-08-04 21:31:52,545 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2019-08-04 21:31:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:52,545 INFO L475 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2019-08-04 21:31:52,545 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-08-04 21:31:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2019-08-04 21:31:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-08-04 21:31:52,546 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:52,546 INFO L399 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1] [2019-08-04 21:31:52,546 INFO L418 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1781042325, now seen corresponding path program 91 times [2019-08-04 21:31:52,547 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:52,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 93 conjunts are in the unsatisfiable core [2019-08-04 21:31:52,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2019-08-04 21:31:55,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:55,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-08-04 21:31:55,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-08-04 21:31:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-08-04 21:31:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-08-04 21:31:55,560 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2019-08-04 21:31:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:31:56,249 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2019-08-04 21:31:56,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-08-04 21:31:56,249 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2019-08-04 21:31:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:31:56,250 INFO L225 Difference]: With dead ends: 189 [2019-08-04 21:31:56,250 INFO L226 Difference]: Without dead ends: 189 [2019-08-04 21:31:56,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-08-04 21:31:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-08-04 21:31:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-08-04 21:31:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-08-04 21:31:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2019-08-04 21:31:56,254 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2019-08-04 21:31:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:31:56,254 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2019-08-04 21:31:56,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-08-04 21:31:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2019-08-04 21:31:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-08-04 21:31:56,255 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:31:56,255 INFO L399 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1] [2019-08-04 21:31:56,255 INFO L418 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:31:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:31:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -658248822, now seen corresponding path program 92 times [2019-08-04 21:31:56,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:31:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:31:56,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 94 conjunts are in the unsatisfiable core [2019-08-04 21:31:56,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:31:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2019-08-04 21:31:59,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:31:59,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-08-04 21:31:59,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-08-04 21:31:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-08-04 21:31:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-08-04 21:31:59,726 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 95 states. [2019-08-04 21:32:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:00,483 INFO L93 Difference]: Finished difference Result 191 states and 192 transitions. [2019-08-04 21:32:00,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-08-04 21:32:00,484 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2019-08-04 21:32:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:00,484 INFO L225 Difference]: With dead ends: 191 [2019-08-04 21:32:00,484 INFO L226 Difference]: Without dead ends: 191 [2019-08-04 21:32:00,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-08-04 21:32:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-08-04 21:32:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-08-04 21:32:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-08-04 21:32:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2019-08-04 21:32:00,487 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2019-08-04 21:32:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:00,488 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2019-08-04 21:32:00,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-08-04 21:32:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2019-08-04 21:32:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-08-04 21:32:00,489 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:00,489 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1] [2019-08-04 21:32:00,489 INFO L418 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash 844526837, now seen corresponding path program 93 times [2019-08-04 21:32:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:00,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 95 conjunts are in the unsatisfiable core [2019-08-04 21:32:00,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2019-08-04 21:32:04,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:04,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-08-04 21:32:04,026 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-08-04 21:32:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-08-04 21:32:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-08-04 21:32:04,027 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2019-08-04 21:32:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:04,785 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2019-08-04 21:32:04,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-08-04 21:32:04,786 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2019-08-04 21:32:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:04,787 INFO L225 Difference]: With dead ends: 193 [2019-08-04 21:32:04,787 INFO L226 Difference]: Without dead ends: 193 [2019-08-04 21:32:04,788 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-08-04 21:32:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-08-04 21:32:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2019-08-04 21:32:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-08-04 21:32:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2019-08-04 21:32:04,790 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2019-08-04 21:32:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:04,791 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2019-08-04 21:32:04,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-08-04 21:32:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2019-08-04 21:32:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-08-04 21:32:04,791 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:04,791 INFO L399 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1] [2019-08-04 21:32:04,792 INFO L418 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash -679759190, now seen corresponding path program 94 times [2019-08-04 21:32:04,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:04,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 96 conjunts are in the unsatisfiable core [2019-08-04 21:32:04,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2019-08-04 21:32:08,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:08,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-08-04 21:32:08,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-08-04 21:32:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-08-04 21:32:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-08-04 21:32:08,664 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 97 states. [2019-08-04 21:32:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:09,399 INFO L93 Difference]: Finished difference Result 195 states and 196 transitions. [2019-08-04 21:32:09,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-08-04 21:32:09,399 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2019-08-04 21:32:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:09,400 INFO L225 Difference]: With dead ends: 195 [2019-08-04 21:32:09,400 INFO L226 Difference]: Without dead ends: 195 [2019-08-04 21:32:09,401 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-08-04 21:32:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-08-04 21:32:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-08-04 21:32:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-08-04 21:32:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2019-08-04 21:32:09,403 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2019-08-04 21:32:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:09,403 INFO L475 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2019-08-04 21:32:09,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-08-04 21:32:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2019-08-04 21:32:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-08-04 21:32:09,404 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:09,404 INFO L399 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1] [2019-08-04 21:32:09,404 INFO L418 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash 606426453, now seen corresponding path program 95 times [2019-08-04 21:32:09,405 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:09,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 97 conjunts are in the unsatisfiable core [2019-08-04 21:32:09,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2019-08-04 21:32:12,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:12,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-08-04 21:32:12,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-08-04 21:32:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-08-04 21:32:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-08-04 21:32:12,859 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2019-08-04 21:32:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:13,622 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2019-08-04 21:32:13,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-08-04 21:32:13,623 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2019-08-04 21:32:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:13,624 INFO L225 Difference]: With dead ends: 197 [2019-08-04 21:32:13,624 INFO L226 Difference]: Without dead ends: 197 [2019-08-04 21:32:13,625 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-08-04 21:32:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-08-04 21:32:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2019-08-04 21:32:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-08-04 21:32:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2019-08-04 21:32:13,628 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2019-08-04 21:32:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:13,628 INFO L475 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2019-08-04 21:32:13,629 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-08-04 21:32:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2019-08-04 21:32:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-08-04 21:32:13,629 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:13,630 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1] [2019-08-04 21:32:13,630 INFO L418 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash 213107146, now seen corresponding path program 96 times [2019-08-04 21:32:13,631 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:13,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 98 conjunts are in the unsatisfiable core [2019-08-04 21:32:13,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 4656 trivial. 0 not checked. [2019-08-04 21:32:16,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:16,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-08-04 21:32:16,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-08-04 21:32:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-08-04 21:32:16,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-08-04 21:32:16,891 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 99 states. [2019-08-04 21:32:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:17,776 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2019-08-04 21:32:17,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-08-04 21:32:17,777 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2019-08-04 21:32:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:17,778 INFO L225 Difference]: With dead ends: 199 [2019-08-04 21:32:17,778 INFO L226 Difference]: Without dead ends: 199 [2019-08-04 21:32:17,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-08-04 21:32:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-08-04 21:32:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2019-08-04 21:32:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-08-04 21:32:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2019-08-04 21:32:17,781 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2019-08-04 21:32:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:17,782 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2019-08-04 21:32:17,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-08-04 21:32:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2019-08-04 21:32:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-08-04 21:32:17,782 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:17,782 INFO L399 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1] [2019-08-04 21:32:17,783 INFO L418 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -470864459, now seen corresponding path program 97 times [2019-08-04 21:32:17,783 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:17,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 99 conjunts are in the unsatisfiable core [2019-08-04 21:32:17,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2019-08-04 21:32:21,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:21,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-08-04 21:32:21,132 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-08-04 21:32:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-08-04 21:32:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-08-04 21:32:21,133 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2019-08-04 21:32:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:21,951 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2019-08-04 21:32:21,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-08-04 21:32:21,951 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2019-08-04 21:32:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:21,952 INFO L225 Difference]: With dead ends: 201 [2019-08-04 21:32:21,953 INFO L226 Difference]: Without dead ends: 201 [2019-08-04 21:32:21,953 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-08-04 21:32:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-08-04 21:32:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2019-08-04 21:32:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-08-04 21:32:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2019-08-04 21:32:21,955 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2019-08-04 21:32:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:21,955 INFO L475 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2019-08-04 21:32:21,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-08-04 21:32:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2019-08-04 21:32:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-08-04 21:32:21,956 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:21,956 INFO L399 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1] [2019-08-04 21:32:21,956 INFO L418 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 338827498, now seen corresponding path program 98 times [2019-08-04 21:32:21,957 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:21,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 100 conjunts are in the unsatisfiable core [2019-08-04 21:32:21,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-08-04 21:32:25,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:25,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-08-04 21:32:25,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-08-04 21:32:25,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-08-04 21:32:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-08-04 21:32:25,640 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 101 states. [2019-08-04 21:32:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:26,442 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2019-08-04 21:32:26,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-08-04 21:32:26,442 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2019-08-04 21:32:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:26,443 INFO L225 Difference]: With dead ends: 203 [2019-08-04 21:32:26,443 INFO L226 Difference]: Without dead ends: 203 [2019-08-04 21:32:26,444 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-08-04 21:32:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-08-04 21:32:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2019-08-04 21:32:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-08-04 21:32:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2019-08-04 21:32:26,447 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2019-08-04 21:32:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:26,447 INFO L475 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2019-08-04 21:32:26,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-08-04 21:32:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2019-08-04 21:32:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-08-04 21:32:26,448 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:26,448 INFO L399 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1] [2019-08-04 21:32:26,448 INFO L418 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1267596821, now seen corresponding path program 99 times [2019-08-04 21:32:26,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:26,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 101 conjunts are in the unsatisfiable core [2019-08-04 21:32:26,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2019-08-04 21:32:30,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:30,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-08-04 21:32:30,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-08-04 21:32:30,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-08-04 21:32:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-08-04 21:32:30,205 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2019-08-04 21:32:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:31,058 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2019-08-04 21:32:31,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-08-04 21:32:31,059 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2019-08-04 21:32:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:31,060 INFO L225 Difference]: With dead ends: 205 [2019-08-04 21:32:31,060 INFO L226 Difference]: Without dead ends: 205 [2019-08-04 21:32:31,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-08-04 21:32:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-08-04 21:32:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-08-04 21:32:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-08-04 21:32:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2019-08-04 21:32:31,062 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2019-08-04 21:32:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:31,062 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2019-08-04 21:32:31,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-08-04 21:32:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2019-08-04 21:32:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-08-04 21:32:31,064 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:31,064 INFO L399 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1] [2019-08-04 21:32:31,064 INFO L418 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1807960054, now seen corresponding path program 100 times [2019-08-04 21:32:31,065 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:31,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 102 conjunts are in the unsatisfiable core [2019-08-04 21:32:31,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2019-08-04 21:32:34,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:34,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-08-04 21:32:34,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-08-04 21:32:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-08-04 21:32:34,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2019-08-04 21:32:34,874 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 103 states. [2019-08-04 21:32:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:35,729 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2019-08-04 21:32:35,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-08-04 21:32:35,730 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2019-08-04 21:32:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:35,731 INFO L225 Difference]: With dead ends: 207 [2019-08-04 21:32:35,731 INFO L226 Difference]: Without dead ends: 207 [2019-08-04 21:32:35,732 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2019-08-04 21:32:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-08-04 21:32:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2019-08-04 21:32:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-08-04 21:32:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2019-08-04 21:32:35,734 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2019-08-04 21:32:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:35,735 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2019-08-04 21:32:35,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-08-04 21:32:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2019-08-04 21:32:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-08-04 21:32:35,736 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:35,736 INFO L399 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1] [2019-08-04 21:32:35,736 INFO L418 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 173786741, now seen corresponding path program 101 times [2019-08-04 21:32:35,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:32:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:32:35,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 103 conjunts are in the unsatisfiable core [2019-08-04 21:32:35,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:32:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2019-08-04 21:32:39,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:32:39,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2019-08-04 21:32:39,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-08-04 21:32:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-08-04 21:32:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2019-08-04 21:32:39,669 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 104 states. [2019-08-04 21:32:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:32:40,569 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2019-08-04 21:32:40,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-08-04 21:32:40,569 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2019-08-04 21:32:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:32:40,570 INFO L225 Difference]: With dead ends: 209 [2019-08-04 21:32:40,570 INFO L226 Difference]: Without dead ends: 209 [2019-08-04 21:32:40,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2019-08-04 21:32:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-08-04 21:32:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2019-08-04 21:32:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-08-04 21:32:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2019-08-04 21:32:40,573 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2019-08-04 21:32:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:32:40,574 INFO L475 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2019-08-04 21:32:40,574 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-08-04 21:32:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2019-08-04 21:32:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-08-04 21:32:40,575 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:32:40,575 INFO L399 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1] [2019-08-04 21:32:40,575 INFO L418 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:32:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:32:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1650876630, now seen corresponding path program 102 times [2019-08-04 21:32:40,576 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:33:01,740 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.OutOfMemoryError: Java heap space at de.uni_freiburg.informatik.ultimate.smtinterpol.util.CuckooHashSet.resize(CuckooHashSet.java:110) at de.uni_freiburg.informatik.ultimate.smtinterpol.util.CuckooHashSet.add_internal(CuckooHashSet.java:146) at de.uni_freiburg.informatik.ultimate.smtinterpol.util.CuckooHashSet.add(CuckooHashSet.java:196) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.cclosure.CClosure.insertEqualityEntry(CClosure.java:154) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.cclosure.CClosure.createCCEquality(CClosure.java:188) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createAtom(EqualityProxy.java:190) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.getLiteral(EqualityProxy.java:197) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.Clausifier$CollectLiterals.perform(Clausifier.java:740) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.Clausifier.run(Clausifier.java:1669) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.Clausifier.addFormula(Clausifier.java:1733) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:644) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.assertTerm(ManagedScript.java:136) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:193) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAssertConjunctsOfCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertConjunctsOfCodeBlocks.java:237) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAssertConjunctsOfCodeBlocks.annotateAndAssertConjuncts(AnnotateAndAssertConjunctsOfCodeBlocks.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAssertConjunctsOfCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertConjunctsOfCodeBlocks.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.FixedRefinementStrategy.getTraceCheck(FixedRefinementStrategy.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) 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:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) [2019-08-04 21:33:01,746 INFO L168 Benchmark]: Toolchain (without parser) took 212746.58 ms. Allocated memory was 135.8 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 113.3 MB in the beginning and 3.8 GB in the end (delta: -3.7 GB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,746 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 114.6 MB in the beginning and 114.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 135.8 MB. Free memory was 113.1 MB in the beginning and 111.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,748 INFO L168 Benchmark]: Boogie Preprocessor took 20.27 ms. Allocated memory is still 135.8 MB. Free memory was 111.5 MB in the beginning and 110.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,748 INFO L168 Benchmark]: RCFGBuilder took 296.46 ms. Allocated memory is still 135.8 MB. Free memory was 110.4 MB in the beginning and 101.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,749 INFO L168 Benchmark]: TraceAbstraction took 212390.77 ms. Allocated memory was 135.8 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 100.7 MB in the beginning and 3.8 GB in the end (delta: -3.7 GB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2019-08-04 21:33:01,753 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 114.6 MB in the beginning and 114.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 135.8 MB. Free memory was 113.1 MB in the beginning and 111.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.27 ms. Allocated memory is still 135.8 MB. Free memory was 111.5 MB in the beginning and 110.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.46 ms. Allocated memory is still 135.8 MB. Free memory was 110.4 MB in the beginning and 101.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212390.77 ms. Allocated memory was 135.8 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 100.7 MB in the beginning and 3.8 GB in the end (delta: -3.7 GB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: OutOfMemoryError: Java heap space de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: OutOfMemoryError: Java heap space: de.uni_freiburg.informatik.ultimate.smtinterpol.util.CuckooHashSet.resize(CuckooHashSet.java:110) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...