java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:24:31,468 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:24:31,470 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:24:31,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:24:31,488 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:24:31,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:24:31,491 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:24:31,502 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:24:31,504 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:24:31,507 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:24:31,508 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-14 16:24:31,539 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 16:24:31,539 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 16:24:31,541 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 16:24:31,542 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 16:24:31,543 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 16:24:31,543 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 16:24:31,545 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 16:24:31,547 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 16:24:31,547 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 16:24:31,551 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 16:24:31,567 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:24:31,567 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:24:31,568 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:24:31,568 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:24:31,568 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:24:31,568 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:24:31,572 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:24:31,572 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:24:31,572 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:24:31,573 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:24:31,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:24:31,573 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:24:31,573 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:24:31,575 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:24:31,575 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:24:31,626 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:24:31,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:24:31,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:24:31,648 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:24:31,649 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:24:31,651 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl [2018-10-14 16:24:31,652 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl' [2018-10-14 16:24:31,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:24:31,745 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:24:31,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:24:31,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:24:31,746 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:24:31,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:24:31,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:24:31,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:24:31,803 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:24:31,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (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 [2018-10-14 16:24:31,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:24:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:24:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:24:32,488 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:24:32,489 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:24:32 BoogieIcfgContainer [2018-10-14 16:24:32,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:24:32,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:24:32,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:24:32,494 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:24:32,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/2) ... [2018-10-14 16:24:32,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8733c6a and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:24:32, skipping insertion in model container [2018-10-14 16:24:32,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:24:32" (2/2) ... [2018-10-14 16:24:32,498 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i_5.bpl [2018-10-14 16:24:32,505 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:24:32,516 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:24:32,532 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:24:32,562 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:24:32,562 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:24:32,563 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:24:32,563 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:24:32,563 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:24:32,563 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:24:32,563 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:24:32,563 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:24:32,563 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:24:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-14 16:24:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 16:24:32,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:32,590 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:32,591 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:32,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-14 16:24:32,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:33,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:24:33,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-14 16:24:33,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 16:24:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 16:24:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:24:33,912 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-14 16:24:34,762 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-14 16:24:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:35,450 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-14 16:24:35,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 16:24:35,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-14 16:24:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:35,466 INFO L225 Difference]: With dead ends: 74 [2018-10-14 16:24:35,466 INFO L226 Difference]: Without dead ends: 74 [2018-10-14 16:24:35,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:24:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-14 16:24:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-14 16:24:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 16:24:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 16:24:35,514 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-14 16:24:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:35,515 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 16:24:35,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 16:24:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 16:24:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 16:24:35,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:35,518 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:35,518 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:35,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-14 16:24:35,520 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:36,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:36,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:24:36,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:24:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:24:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:24:36,174 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-14 16:24:36,727 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-14 16:24:37,812 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:37,982 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-14 16:24:37,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 16:24:37,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-14 16:24:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:37,986 INFO L225 Difference]: With dead ends: 86 [2018-10-14 16:24:37,986 INFO L226 Difference]: Without dead ends: 86 [2018-10-14 16:24:37,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:24:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-14 16:24:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-14 16:24:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 16:24:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 16:24:37,997 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-14 16:24:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:37,997 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 16:24:37,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:24:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 16:24:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 16:24:38,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:38,000 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:38,001 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:38,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-14 16:24:38,002 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:38,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:38,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 16:24:38,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 16:24:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 16:24:38,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:24:38,471 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-14 16:24:39,350 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-14 16:24:39,821 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:40,463 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-14 16:24:40,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 16:24:40,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-14 16:24:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:40,467 INFO L225 Difference]: With dead ends: 98 [2018-10-14 16:24:40,467 INFO L226 Difference]: Without dead ends: 98 [2018-10-14 16:24:40,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 16:24:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-14 16:24:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-14 16:24:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 16:24:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 16:24:40,481 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-14 16:24:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:40,482 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 16:24:40,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 16:24:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 16:24:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 16:24:40,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:40,485 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:40,486 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:40,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-14 16:24:40,487 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:41,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:41,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 16:24:41,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 16:24:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 16:24:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:24:41,102 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-14 16:24:42,926 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:43,868 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-14 16:24:43,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 16:24:43,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-14 16:24:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:43,871 INFO L225 Difference]: With dead ends: 110 [2018-10-14 16:24:43,872 INFO L226 Difference]: Without dead ends: 110 [2018-10-14 16:24:43,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:24:43,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-14 16:24:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-14 16:24:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 16:24:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 16:24:43,882 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-14 16:24:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:43,882 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 16:24:43,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 16:24:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 16:24:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 16:24:43,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:43,885 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:43,885 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:43,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-14 16:24:43,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:44,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:44,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 16:24:44,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 16:24:44,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 16:24:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:24:44,479 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-14 16:24:47,240 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-14 16:24:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:47,337 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-14 16:24:47,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 16:24:47,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-14 16:24:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:47,343 INFO L225 Difference]: With dead ends: 122 [2018-10-14 16:24:47,343 INFO L226 Difference]: Without dead ends: 122 [2018-10-14 16:24:47,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 16:24:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-14 16:24:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-14 16:24:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 16:24:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 16:24:47,352 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-14 16:24:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:47,353 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 16:24:47,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 16:24:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 16:24:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 16:24:47,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:47,355 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:47,355 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:47,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-14 16:24:47,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:47,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:47,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 16:24:47,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 16:24:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 16:24:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:24:47,954 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-14 16:24:49,950 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:24:50,446 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:24:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:51,600 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 16:24:51,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 16:24:51,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-14 16:24:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:51,603 INFO L225 Difference]: With dead ends: 134 [2018-10-14 16:24:51,603 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 16:24:51,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 16:24:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 16:24:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-14 16:24:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 16:24:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 16:24:51,613 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-14 16:24:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:51,614 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 16:24:51,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 16:24:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 16:24:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 16:24:51,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:51,616 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:51,616 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:51,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-14 16:24:51,617 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:52,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:52,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 16:24:52,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 16:24:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 16:24:52,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:24:52,837 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-14 16:24:55,283 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 16:24:55,554 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:24:55,957 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:24:56,100 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 16:24:56,470 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 16:24:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:57,213 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 16:24:57,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:24:57,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-14 16:24:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:57,215 INFO L225 Difference]: With dead ends: 146 [2018-10-14 16:24:57,215 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 16:24:57,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:24:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 16:24:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-14 16:24:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 16:24:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 16:24:57,224 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-14 16:24:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:57,225 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 16:24:57,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 16:24:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 16:24:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 16:24:57,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:57,227 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:57,228 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:57,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-14 16:24:57,229 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:59,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:59,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:24:59,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:24:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:24:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:24:59,199 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-14 16:24:59,886 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-14 16:25:02,131 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:02,293 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:25:03,509 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-14 16:25:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:04,592 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-14 16:25:04,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 16:25:04,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-14 16:25:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:04,595 INFO L225 Difference]: With dead ends: 158 [2018-10-14 16:25:04,595 INFO L226 Difference]: Without dead ends: 158 [2018-10-14 16:25:04,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 16:25:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-14 16:25:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-14 16:25:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 16:25:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 16:25:04,604 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-14 16:25:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:04,605 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 16:25:04,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:25:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 16:25:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 16:25:04,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:04,607 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:04,607 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:04,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-14 16:25:04,609 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:05,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:05,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:25:05,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:25:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:25:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:25:05,585 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-14 16:25:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:10,756 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-14 16:25:10,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 16:25:10,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-14 16:25:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:10,759 INFO L225 Difference]: With dead ends: 170 [2018-10-14 16:25:10,759 INFO L226 Difference]: Without dead ends: 170 [2018-10-14 16:25:10,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 16:25:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-14 16:25:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-14 16:25:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 16:25:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 16:25:10,767 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-14 16:25:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:10,767 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 16:25:10,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:25:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 16:25:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 16:25:10,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:10,770 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:10,771 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:10,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-14 16:25:10,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:11,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:11,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 16:25:11,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 16:25:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 16:25:11,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:25:11,636 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-14 16:25:13,669 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 16:25:15,453 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:15,614 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:25:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:17,465 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-14 16:25:17,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 16:25:17,466 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-14 16:25:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:17,467 INFO L225 Difference]: With dead ends: 182 [2018-10-14 16:25:17,467 INFO L226 Difference]: Without dead ends: 182 [2018-10-14 16:25:17,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 16:25:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-14 16:25:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-14 16:25:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 16:25:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 16:25:17,475 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-14 16:25:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:17,475 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 16:25:17,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 16:25:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 16:25:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 16:25:17,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:17,478 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:17,479 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:17,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-14 16:25:17,480 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:18,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:18,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 16:25:18,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 16:25:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 16:25:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:25:18,422 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-14 16:25:21,005 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:21,544 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:21,964 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:25:22,693 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:23,823 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 16:25:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:25,160 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-14 16:25:25,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 16:25:25,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-14 16:25:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:25,164 INFO L225 Difference]: With dead ends: 194 [2018-10-14 16:25:25,164 INFO L226 Difference]: Without dead ends: 194 [2018-10-14 16:25:25,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 16:25:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-14 16:25:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-14 16:25:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 16:25:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 16:25:25,171 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-14 16:25:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:25,171 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 16:25:25,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 16:25:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 16:25:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 16:25:25,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:25,174 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:25,174 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:25,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-14 16:25:25,175 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:26,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:26,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 16:25:26,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 16:25:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 16:25:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:25:26,148 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-14 16:25:29,204 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:33,575 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-14 16:25:33,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:25:33,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-14 16:25:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:33,578 INFO L225 Difference]: With dead ends: 206 [2018-10-14 16:25:33,578 INFO L226 Difference]: Without dead ends: 206 [2018-10-14 16:25:33,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 16:25:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-14 16:25:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-14 16:25:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 16:25:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 16:25:33,585 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-14 16:25:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:33,586 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 16:25:33,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 16:25:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 16:25:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 16:25:33,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:33,587 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:33,588 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:33,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-14 16:25:33,589 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:35,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:35,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 16:25:35,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 16:25:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 16:25:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:25:35,180 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-14 16:25:38,851 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:25:39,020 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:39,392 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:25:39,579 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:39,746 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:40,182 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:40,358 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:40,812 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:40,992 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:25:41,449 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:25:41,618 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:25:41,937 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:25:42,104 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 16:25:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:43,283 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 16:25:43,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:25:43,284 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-14 16:25:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:43,285 INFO L225 Difference]: With dead ends: 218 [2018-10-14 16:25:43,285 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 16:25:43,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 16:25:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 16:25:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-14 16:25:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 16:25:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 16:25:43,289 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-14 16:25:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:43,290 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 16:25:43,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 16:25:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 16:25:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 16:25:43,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:43,291 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:43,292 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:43,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:43,292 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-14 16:25:43,293 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:44,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:44,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 16:25:44,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 16:25:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 16:25:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:25:44,559 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-14 16:25:49,237 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:25:49,702 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:53,193 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-14 16:25:53,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 16:25:53,194 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-14 16:25:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:53,195 INFO L225 Difference]: With dead ends: 230 [2018-10-14 16:25:53,195 INFO L226 Difference]: Without dead ends: 230 [2018-10-14 16:25:53,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 16:25:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-14 16:25:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-14 16:25:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 16:25:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 16:25:53,202 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-14 16:25:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:53,202 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 16:25:53,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 16:25:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 16:25:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 16:25:53,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:53,204 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:53,204 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:53,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-14 16:25:53,205 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:54,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:54,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 16:25:54,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 16:25:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 16:25:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 16:25:54,760 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-14 16:25:57,878 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:25:59,498 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:25:59,671 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:02,024 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:02,677 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:04,286 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-14 16:26:04,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 16:26:04,287 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-14 16:26:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:04,288 INFO L225 Difference]: With dead ends: 242 [2018-10-14 16:26:04,288 INFO L226 Difference]: Without dead ends: 242 [2018-10-14 16:26:04,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 16:26:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-14 16:26:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-14 16:26:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 16:26:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 16:26:04,294 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-14 16:26:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 16:26:04,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 16:26:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 16:26:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 16:26:04,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:04,296 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:04,296 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:04,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-14 16:26:04,297 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:05,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:05,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:26:05,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:26:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:26:05,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:26:05,875 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-14 16:26:15,106 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-14 16:26:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:15,616 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-14 16:26:15,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 16:26:15,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-14 16:26:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:15,618 INFO L225 Difference]: With dead ends: 254 [2018-10-14 16:26:15,618 INFO L226 Difference]: Without dead ends: 254 [2018-10-14 16:26:15,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 16:26:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-14 16:26:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-14 16:26:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 16:26:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 16:26:15,623 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-14 16:26:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:15,624 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 16:26:15,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:26:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 16:26:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 16:26:15,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:15,625 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:15,626 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:15,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-14 16:26:15,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:17,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:17,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:26:17,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:26:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:26:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:26:17,277 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-14 16:26:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:27,879 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-14 16:26:27,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 16:26:27,880 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-14 16:26:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:27,882 INFO L225 Difference]: With dead ends: 266 [2018-10-14 16:26:27,882 INFO L226 Difference]: Without dead ends: 266 [2018-10-14 16:26:27,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 16:26:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-14 16:26:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-14 16:26:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 16:26:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 16:26:27,888 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-14 16:26:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:27,888 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 16:26:27,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:26:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 16:26:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 16:26:27,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:27,890 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:27,890 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:27,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-14 16:26:27,891 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:30,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:30,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 16:26:30,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 16:26:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 16:26:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 16:26:30,329 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-14 16:26:35,499 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:26:40,932 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:26:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:42,853 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-14 16:26:42,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 16:26:42,854 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-14 16:26:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:42,856 INFO L225 Difference]: With dead ends: 278 [2018-10-14 16:26:42,856 INFO L226 Difference]: Without dead ends: 278 [2018-10-14 16:26:42,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 16:26:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-14 16:26:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-14 16:26:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 16:26:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 16:26:42,862 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-14 16:26:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 16:26:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 16:26:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 16:26:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 16:26:42,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:42,865 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:42,865 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:42,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-14 16:26:42,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:44,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:44,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 16:26:44,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 16:26:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 16:26:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 16:26:44,607 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-14 16:26:48,132 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:48,278 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:48,669 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:49,218 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:49,790 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:49,947 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:50,379 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:51,042 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:51,234 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:51,687 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:51,866 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:52,328 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:52,510 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:53,021 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:53,208 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:53,706 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:54,384 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:55,087 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:55,812 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:56,052 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 16:26:56,667 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 16:26:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:57,779 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-14 16:26:57,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 16:26:57,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-14 16:26:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:57,782 INFO L225 Difference]: With dead ends: 290 [2018-10-14 16:26:57,782 INFO L226 Difference]: Without dead ends: 290 [2018-10-14 16:26:57,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 16:26:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-14 16:26:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-14 16:26:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 16:26:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 16:26:57,788 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-14 16:26:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:57,789 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 16:26:57,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 16:26:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 16:26:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 16:26:57,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:57,791 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:57,791 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:57,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-14 16:26:57,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:59,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:59,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 16:26:59,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 16:26:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 16:26:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:26:59,686 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-14 16:27:05,908 WARN L179 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:27:06,220 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:11,491 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:14,110 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 16:27:14,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:27:14,112 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-14 16:27:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:14,114 INFO L225 Difference]: With dead ends: 302 [2018-10-14 16:27:14,114 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 16:27:14,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-14 16:27:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 16:27:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-14 16:27:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 16:27:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 16:27:14,119 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-14 16:27:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:14,120 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 16:27:14,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 16:27:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 16:27:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 16:27:14,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:14,121 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:14,122 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:14,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-14 16:27:14,123 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:16,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:16,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 16:27:16,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 16:27:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 16:27:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 16:27:16,357 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-14 16:27:20,904 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:27:21,075 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:21,608 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:21,819 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:22,288 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:22,464 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:22,935 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:23,122 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:23,599 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:23,792 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:24,298 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:24,496 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:25,004 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:25,209 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:25,743 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:25,959 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:26,493 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:26,727 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:26,941 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 16:27:27,353 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:27,578 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:28,163 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:28,397 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:28,973 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:29,214 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:27:29,790 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:27:30,014 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:27:30,428 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:27:30,659 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 16:27:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:32,374 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-14 16:27:32,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:27:32,374 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-14 16:27:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:32,375 INFO L225 Difference]: With dead ends: 314 [2018-10-14 16:27:32,376 INFO L226 Difference]: Without dead ends: 314 [2018-10-14 16:27:32,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 16:27:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-14 16:27:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-14 16:27:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 16:27:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 16:27:32,381 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-14 16:27:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:32,382 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 16:27:32,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 16:27:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 16:27:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 16:27:32,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:32,384 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:32,384 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:32,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-14 16:27:32,385 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:34,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:34,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 16:27:34,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 16:27:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 16:27:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:27:34,435 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-14 16:27:36,942 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:27:37,103 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:42,057 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:27:42,309 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:47,193 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:49,167 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-14 16:27:49,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 16:27:49,169 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-14 16:27:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:49,171 INFO L225 Difference]: With dead ends: 326 [2018-10-14 16:27:49,171 INFO L226 Difference]: Without dead ends: 326 [2018-10-14 16:27:49,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-14 16:27:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-14 16:27:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-14 16:27:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 16:27:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 16:27:49,178 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-14 16:27:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:49,178 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 16:27:49,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 16:27:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 16:27:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 16:27:49,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:49,180 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:49,180 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:49,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-14 16:27:49,181 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:51,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:51,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 16:27:51,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 16:27:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 16:27:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:27:51,239 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-14 16:27:54,680 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:56,938 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:57,581 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:57,782 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:27:58,883 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:02,335 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:02,578 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:28:03,232 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:04,758 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:05,544 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:07,583 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 16:28:07,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-14 16:28:07,584 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-14 16:28:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:07,588 INFO L225 Difference]: With dead ends: 338 [2018-10-14 16:28:07,589 INFO L226 Difference]: Without dead ends: 338 [2018-10-14 16:28:07,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-14 16:28:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-14 16:28:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-14 16:28:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 16:28:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 16:28:07,595 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-14 16:28:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:07,595 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 16:28:07,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 16:28:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 16:28:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 16:28:07,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:07,598 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:07,598 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:07,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-14 16:28:07,599 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:10,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:10,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 16:28:10,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 16:28:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 16:28:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:28:10,141 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-14 16:28:12,779 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 16:28:12,967 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:28:17,890 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:28:18,151 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:28:23,191 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 16:28:25,974 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:28:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:27,434 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-14 16:28:27,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-14 16:28:27,434 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-14 16:28:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:27,436 INFO L225 Difference]: With dead ends: 350 [2018-10-14 16:28:27,436 INFO L226 Difference]: Without dead ends: 350 [2018-10-14 16:28:27,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-14 16:28:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-14 16:28:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-14 16:28:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 16:28:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 16:28:27,441 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-14 16:28:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:27,442 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 16:28:27,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 16:28:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 16:28:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 16:28:27,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:27,444 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:27,444 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:27,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-14 16:28:27,445 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:30,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:30,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 16:28:30,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 16:28:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 16:28:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 16:28:30,416 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-14 16:28:33,275 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-14 16:28:33,474 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 16:28:34,023 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 16:28:34,725 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-14 16:28:34,903 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-14 16:28:35,479 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-14 16:28:35,662 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-14 16:28:36,271 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-14 16:28:36,477 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-14 16:28:37,109 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-14 16:28:37,326 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-14 16:28:37,679 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-14 16:28:38,002 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-14 16:28:38,250 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:38,483 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:38,770 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:39,021 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:39,264 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:39,437 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:39,624 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:39,875 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:40,125 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:40,309 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:40,496 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:40,743 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:41,006 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:41,192 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:41,395 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:41,654 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:41,923 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:42,112 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:42,309 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:42,577 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:42,848 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:43,041 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:43,238 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:43,523 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:43,877 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:44,077 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:44,278 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:44,555 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:44,851 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-14 16:28:45,050 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-14 16:28:45,252 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-14 16:28:45,519 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-14 16:28:45,794 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-14 16:28:46,276 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-14 16:28:46,549 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-14 16:28:47,019 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-14 16:28:47,275 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-14 16:28:47,725 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-14 16:28:47,975 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-14 16:28:48,409 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-14 16:28:48,665 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-14 16:28:49,147 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-14 16:28:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:50,981 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-14 16:28:50,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 16:28:50,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-14 16:28:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:50,983 INFO L225 Difference]: With dead ends: 362 [2018-10-14 16:28:50,983 INFO L226 Difference]: Without dead ends: 362 [2018-10-14 16:28:50,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 16:28:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-14 16:28:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-14 16:28:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-14 16:28:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-14 16:28:50,989 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-14 16:28:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:50,990 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-14 16:28:50,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 16:28:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-14 16:28:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-14 16:28:50,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:50,992 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:50,992 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:50,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-14 16:28:50,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:53,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:53,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 16:28:53,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 16:28:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 16:28:53,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:28:53,989 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-14 16:28:58,955 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:28:59,141 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:04,267 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:05,666 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:09,243 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:13,184 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-14 16:29:13,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 16:29:13,185 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-14 16:29:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:13,186 INFO L225 Difference]: With dead ends: 374 [2018-10-14 16:29:13,187 INFO L226 Difference]: Without dead ends: 374 [2018-10-14 16:29:13,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-14 16:29:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-14 16:29:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-14 16:29:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 16:29:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-14 16:29:13,193 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-14 16:29:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:13,194 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-14 16:29:13,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 16:29:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-14 16:29:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 16:29:13,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:13,196 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:13,196 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:13,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-14 16:29:13,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:29:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:29:15,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:29:15,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 16:29:15,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 16:29:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 16:29:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 16:29:15,980 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-14 16:29:18,796 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:19,371 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:19,592 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:20,603 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:21,209 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:21,835 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:23,112 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:23,781 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:24,479 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:24,721 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:25,266 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:25,979 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:26,715 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:27,477 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:29,653 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 16:29:29,927 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:30,761 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:31,599 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:32,461 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:32,718 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:33,341 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:35,697 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 16:29:35,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 16:29:35,697 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-14 16:29:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:35,698 INFO L225 Difference]: With dead ends: 386 [2018-10-14 16:29:35,698 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 16:29:35,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-14 16:29:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 16:29:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-14 16:29:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-14 16:29:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-14 16:29:35,705 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-14 16:29:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:35,705 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-14 16:29:35,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 16:29:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-14 16:29:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-14 16:29:35,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:35,707 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:35,708 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:35,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-14 16:29:35,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:29:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:29:38,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:29:38,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 16:29:38,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 16:29:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 16:29:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:29:38,445 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-14 16:29:44,724 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:50,096 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:59,785 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-14 16:29:59,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 16:29:59,785 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-14 16:29:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:59,788 INFO L225 Difference]: With dead ends: 398 [2018-10-14 16:29:59,788 INFO L226 Difference]: Without dead ends: 398 [2018-10-14 16:29:59,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 16:29:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-14 16:29:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-14 16:29:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 16:29:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 16:29:59,794 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-14 16:29:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:59,794 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 16:29:59,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 16:29:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 16:29:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 16:29:59,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:59,797 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:59,797 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:59,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-14 16:29:59,798 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:02,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:02,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 16:30:02,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 16:30:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 16:30:02,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 16:30:02,972 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-14 16:30:05,494 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-14 16:30:05,661 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 16:30:06,151 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 16:30:06,784 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:30:06,951 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:07,444 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:07,610 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:08,093 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:08,265 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:08,741 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:08,920 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:09,419 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:09,618 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:10,137 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:10,333 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:10,744 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:30:10,952 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:11,154 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:11,707 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:11,919 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:12,464 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:12,678 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:13,231 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:13,456 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:14,020 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:14,248 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:14,829 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:15,065 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:15,678 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:15,964 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:16,586 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:16,829 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:17,466 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:17,716 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:18,346 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:18,608 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:19,268 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:19,532 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:20,190 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:20,466 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:20,919 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:30:21,213 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:21,500 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:22,193 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:22,476 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:30:23,176 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:30:23,455 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:30:23,965 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:30:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:30:26,320 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-14 16:30:26,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 16:30:26,320 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-14 16:30:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:30:26,322 INFO L225 Difference]: With dead ends: 410 [2018-10-14 16:30:26,322 INFO L226 Difference]: Without dead ends: 410 [2018-10-14 16:30:26,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 16:30:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-14 16:30:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-14 16:30:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-14 16:30:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-14 16:30:26,328 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-14 16:30:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:30:26,328 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-14 16:30:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 16:30:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-14 16:30:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-14 16:30:26,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:30:26,331 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:30:26,331 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:30:26,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:30:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-14 16:30:26,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:30:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:29,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:29,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 16:30:29,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 16:30:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 16:30:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:30:29,423 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-14 16:30:35,417 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:36,086 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:36,290 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:30:41,498 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:30:46,510 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:30:51,515 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:30:53,254 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 16:30:53,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-14 16:30:53,255 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-14 16:30:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:30:53,256 INFO L225 Difference]: With dead ends: 422 [2018-10-14 16:30:53,257 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 16:30:53,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-14 16:30:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 16:30:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-14 16:30:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-14 16:30:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-14 16:30:53,262 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-14 16:30:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:30:53,263 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-14 16:30:53,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 16:30:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-14 16:30:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-14 16:30:53,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:30:53,265 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:30:53,265 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:30:53,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:30:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-14 16:30:53,266 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:30:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:56,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:56,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 16:30:56,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 16:30:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 16:30:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:30:56,427 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-14 16:30:59,925 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:00,062 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:00,489 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:01,678 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:01,904 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:04,361 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:05,036 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:05,717 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:07,270 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:08,016 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:08,226 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:08,778 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:09,008 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:09,580 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:10,372 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:11,194 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:12,067 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:12,364 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:12,977 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:13,229 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:13,848 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:14,727 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:14,982 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:15,637 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:15,917 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:16,576 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:17,338 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 16:31:17,600 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:17,871 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:18,543 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:19,495 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 16:31:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:31:20,971 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-14 16:31:20,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 16:31:20,978 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-14 16:31:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:31:20,980 INFO L225 Difference]: With dead ends: 434 [2018-10-14 16:31:20,980 INFO L226 Difference]: Without dead ends: 434 [2018-10-14 16:31:20,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-14 16:31:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-14 16:31:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-14 16:31:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 16:31:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 16:31:20,987 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-14 16:31:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:31:20,987 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 16:31:20,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 16:31:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 16:31:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 16:31:20,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:31:20,990 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:31:20,990 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:31:20,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:31:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-14 16:31:20,991 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:31:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:31:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:31:24,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:31:24,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:31:24,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:31:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:31:24,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:31:24,547 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-14 16:31:32,577 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:33,945 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:40,677 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:42,725 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:31:43,015 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:31:47,795 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:31:50,330 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-14 16:31:50,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 16:31:50,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-14 16:31:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:31:50,332 INFO L225 Difference]: With dead ends: 446 [2018-10-14 16:31:50,332 INFO L226 Difference]: Without dead ends: 446 [2018-10-14 16:31:50,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-14 16:31:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-14 16:31:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-14 16:31:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-14 16:31:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-14 16:31:50,338 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-14 16:31:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:31:50,339 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-14 16:31:50,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:31:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-14 16:31:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-14 16:31:50,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:31:50,342 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:31:50,342 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:31:50,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:31:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-14 16:31:50,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:31:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:31:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:31:55,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:31:55,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:31:55,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:31:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:31:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:31:55,152 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-14 16:32:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:32:25,745 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-14 16:32:25,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-14 16:32:25,746 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-14 16:32:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:32:25,747 INFO L225 Difference]: With dead ends: 458 [2018-10-14 16:32:25,747 INFO L226 Difference]: Without dead ends: 458 [2018-10-14 16:32:25,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-14 16:32:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-14 16:32:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-14 16:32:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-14 16:32:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-14 16:32:25,754 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-14 16:32:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:32:25,755 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-14 16:32:25,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:32:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-14 16:32:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-14 16:32:25,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:32:25,758 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:32:25,758 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:32:25,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:32:25,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-14 16:32:25,759 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:32:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:32:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:32:30,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:32:30,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-14 16:32:30,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-14 16:32:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-14 16:32:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-14 16:32:30,550 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-14 16:32:33,989 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:39,265 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:44,128 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:44,419 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:45,232 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:49,335 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:32:58,477 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-14 16:32:58,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-14 16:32:58,477 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-14 16:32:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:32:58,479 INFO L225 Difference]: With dead ends: 470 [2018-10-14 16:32:58,479 INFO L226 Difference]: Without dead ends: 470 [2018-10-14 16:32:58,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-14 16:32:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-14 16:32:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-14 16:32:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-14 16:32:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-14 16:32:58,486 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-14 16:32:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:32:58,486 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-14 16:32:58,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-14 16:32:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-14 16:32:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-14 16:32:58,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:32:58,489 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:32:58,489 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:32:58,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:32:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-14 16:32:58,490 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:32:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:33:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:33:02,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:33:02,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-14 16:33:02,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-14 16:33:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-14 16:33:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=6039, Unknown=0, NotChecked=0, Total=7310 [2018-10-14 16:33:02,682 INFO L87 Difference]: Start difference. First operand 460 states and 460 transitions. Second operand 86 states. [2018-10-14 16:33:04,865 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 16:33:06,037 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:06,626 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:07,205 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:07,360 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:07,812 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:08,429 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:09,064 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:09,745 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:09,968 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:10,511 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:11,202 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:11,957 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:12,169 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:12,698 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:13,428 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:13,648 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:14,196 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56