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/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:35:58,345 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:35:58,347 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:35:58,358 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:35:58,359 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:35:58,360 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:35:58,361 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:35:58,362 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:35:58,364 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:35:58,365 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:35:58,366 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 16:35:58,366 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 16:35:58,367 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 16:35:58,368 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 16:35:58,369 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 16:35:58,369 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 16:35:58,370 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 16:35:58,373 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 16:35:58,376 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 16:35:58,382 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 16:35:58,383 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 16:35:58,384 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 16:35:58,386 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 16:35:58,386 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 16:35:58,387 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 16:35:58,387 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 16:35:58,388 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 16:35:58,389 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 16:35:58,390 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 16:35:58,391 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 16:35:58,391 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 16:35:58,391 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 16:35:58,394 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 16:35:58,405 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:35:58,405 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:35:58,406 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:35:58,406 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:35:58,406 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:35:58,407 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:35:58,407 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:35:58,408 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:35:58,408 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:35:58,408 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:35:58,408 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:35:58,408 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:35:58,408 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:35:58,409 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:35:58,409 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:35:58,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:35:58,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:35:58,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:35:58,474 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:35:58,475 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:35:58,476 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-14 16:35:58,476 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl' [2018-10-14 16:35:58,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:35:58,541 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:35:58,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:35:58,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:35:58,541 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:35:58,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/1) ... [2018-10-14 16:35:58,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:35:58,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:35:58,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:35:58,590 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:35:58,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (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 16:35:58,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:35:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:35:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:35:59,292 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:35:59,293 INFO L202 PluginConnector]: Adding new model bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:35:59 BoogieIcfgContainer [2018-10-14 16:35:59,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:35:59,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:35:59,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:35:59,298 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:35:59,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:35:58" (1/2) ... [2018-10-14 16:35:59,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467d166a and model type bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:35:59, skipping insertion in model container [2018-10-14 16:35:59,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:35:59" (2/2) ... [2018-10-14 16:35:59,302 INFO L112 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-14 16:35:59,312 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:35:59,322 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:35:59,341 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:35:59,370 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:35:59,371 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:35:59,371 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:35:59,372 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:35:59,372 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:35:59,372 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:35:59,372 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:35:59,372 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:35:59,372 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:35:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-10-14 16:35:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-14 16:35:59,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:35:59,402 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] [2018-10-14 16:35:59,404 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:35:59,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:35:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1412051856, now seen corresponding path program 1 times [2018-10-14 16:35:59,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:35:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:00,399 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 16:36:00,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:36:00,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-14 16:36:00,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-14 16:36:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-14 16:36:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:36:00,427 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 12 states. [2018-10-14 16:36:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:01,625 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2018-10-14 16:36:01,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-14 16:36:01,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-10-14 16:36:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:01,644 INFO L225 Difference]: With dead ends: 94 [2018-10-14 16:36:01,644 INFO L226 Difference]: Without dead ends: 94 [2018-10-14 16:36:01,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:36:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-14 16:36:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2018-10-14 16:36:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-14 16:36:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-14 16:36:01,691 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 35 [2018-10-14 16:36:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:01,692 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-14 16:36:01,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-14 16:36:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-14 16:36:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-14 16:36:01,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:01,694 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-14 16:36:01,695 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:01,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:01,695 INFO L82 PathProgramCache]: Analyzing trace with hash -776350115, now seen corresponding path program 1 times [2018-10-14 16:36:01,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:02,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:02,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 16:36:02,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 16:36:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 16:36:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:36:02,248 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 15 states. [2018-10-14 16:36:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:03,857 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-14 16:36:03,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-14 16:36:03,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-10-14 16:36:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:03,862 INFO L225 Difference]: With dead ends: 155 [2018-10-14 16:36:03,862 INFO L226 Difference]: Without dead ends: 155 [2018-10-14 16:36:03,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:36:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-14 16:36:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 85. [2018-10-14 16:36:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-14 16:36:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2018-10-14 16:36:03,877 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 58 [2018-10-14 16:36:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:03,877 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2018-10-14 16:36:03,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 16:36:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2018-10-14 16:36:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-14 16:36:03,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:03,881 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-14 16:36:03,881 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:03,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:03,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1496518192, now seen corresponding path program 2 times [2018-10-14 16:36:03,883 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:04,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:04,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-14 16:36:04,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-14 16:36:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-14 16:36:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:36:04,495 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 19 states. [2018-10-14 16:36:05,461 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-10-14 16:36:05,970 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-10-14 16:36:06,296 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-10-14 16:36:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:06,809 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-14 16:36:06,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-14 16:36:06,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2018-10-14 16:36:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:06,814 INFO L225 Difference]: With dead ends: 161 [2018-10-14 16:36:06,814 INFO L226 Difference]: Without dead ends: 161 [2018-10-14 16:36:06,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 16:36:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-14 16:36:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-14 16:36:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-14 16:36:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2018-10-14 16:36:06,829 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 81 [2018-10-14 16:36:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:06,830 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2018-10-14 16:36:06,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-14 16:36:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2018-10-14 16:36:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 16:36:06,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:06,834 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-14 16:36:06,834 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:06,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1037220109, now seen corresponding path program 1 times [2018-10-14 16:36:06,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-14 16:36:06,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:36:06,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-14 16:36:06,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-14 16:36:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-14 16:36:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-14 16:36:06,961 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 6 states. [2018-10-14 16:36:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:07,307 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2018-10-14 16:36:07,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-14 16:36:07,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2018-10-14 16:36:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:07,311 INFO L225 Difference]: With dead ends: 136 [2018-10-14 16:36:07,311 INFO L226 Difference]: Without dead ends: 132 [2018-10-14 16:36:07,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-14 16:36:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-14 16:36:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2018-10-14 16:36:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-14 16:36:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2018-10-14 16:36:07,323 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 87 [2018-10-14 16:36:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:07,324 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2018-10-14 16:36:07,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-14 16:36:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2018-10-14 16:36:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-14 16:36:07,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:07,326 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-14 16:36:07,326 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:07,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:07,327 INFO L82 PathProgramCache]: Analyzing trace with hash -917858694, now seen corresponding path program 2 times [2018-10-14 16:36:07,328 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 79 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-14 16:36:07,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:07,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 16:36:07,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:36:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:36:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:36:07,469 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 11 states. [2018-10-14 16:36:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:07,641 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2018-10-14 16:36:07,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-14 16:36:07,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2018-10-14 16:36:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:07,644 INFO L225 Difference]: With dead ends: 179 [2018-10-14 16:36:07,645 INFO L226 Difference]: Without dead ends: 173 [2018-10-14 16:36:07,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:36:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-14 16:36:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2018-10-14 16:36:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-14 16:36:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2018-10-14 16:36:07,654 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 110 [2018-10-14 16:36:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:07,654 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2018-10-14 16:36:07,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:36:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2018-10-14 16:36:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-14 16:36:07,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:07,657 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-14 16:36:07,657 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:07,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -319558035, now seen corresponding path program 3 times [2018-10-14 16:36:07,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:07,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:07,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 16:36:07,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 16:36:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 16:36:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:36:07,890 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 15 states. [2018-10-14 16:36:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:08,194 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-14 16:36:08,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-14 16:36:08,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2018-10-14 16:36:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:08,201 INFO L225 Difference]: With dead ends: 250 [2018-10-14 16:36:08,201 INFO L226 Difference]: Without dead ends: 221 [2018-10-14 16:36:08,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:36:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-14 16:36:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2018-10-14 16:36:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-14 16:36:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-10-14 16:36:08,210 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 133 [2018-10-14 16:36:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:08,213 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-10-14 16:36:08,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 16:36:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-10-14 16:36:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-14 16:36:08,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:08,216 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2018-10-14 16:36:08,216 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:08,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:08,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2016630042, now seen corresponding path program 4 times [2018-10-14 16:36:08,217 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 86 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:08,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:08,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:36:08,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:36:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:36:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:36:08,502 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 17 states. [2018-10-14 16:36:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:09,225 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-14 16:36:09,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-14 16:36:09,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 156 [2018-10-14 16:36:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:09,228 INFO L225 Difference]: With dead ends: 321 [2018-10-14 16:36:09,228 INFO L226 Difference]: Without dead ends: 269 [2018-10-14 16:36:09,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:36:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-14 16:36:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2018-10-14 16:36:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-14 16:36:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2018-10-14 16:36:09,236 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 156 [2018-10-14 16:36:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:09,237 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2018-10-14 16:36:09,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:36:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2018-10-14 16:36:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-14 16:36:09,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:09,239 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2018-10-14 16:36:09,239 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:09,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1576092723, now seen corresponding path program 5 times [2018-10-14 16:36:09,241 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 75 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:10,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:10,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-14 16:36:10,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-14 16:36:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-14 16:36:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:36:10,720 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand 26 states. [2018-10-14 16:36:11,332 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-14 16:36:12,578 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-10-14 16:36:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:13,913 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2018-10-14 16:36:13,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-14 16:36:13,914 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2018-10-14 16:36:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:13,916 INFO L225 Difference]: With dead ends: 225 [2018-10-14 16:36:13,916 INFO L226 Difference]: Without dead ends: 225 [2018-10-14 16:36:13,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=673, Invalid=2519, Unknown=0, NotChecked=0, Total=3192 [2018-10-14 16:36:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-14 16:36:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2018-10-14 16:36:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-14 16:36:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-14 16:36:13,924 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 179 [2018-10-14 16:36:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:13,924 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-14 16:36:13,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-14 16:36:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-14 16:36:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-14 16:36:13,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:13,927 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2018-10-14 16:36:13,927 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:13,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1567944288, now seen corresponding path program 6 times [2018-10-14 16:36:13,929 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 139 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:14,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:14,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-14 16:36:14,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-14 16:36:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-14 16:36:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-10-14 16:36:14,394 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 21 states. [2018-10-14 16:36:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:14,959 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2018-10-14 16:36:14,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-14 16:36:14,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 202 [2018-10-14 16:36:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:14,962 INFO L225 Difference]: With dead ends: 390 [2018-10-14 16:36:14,962 INFO L226 Difference]: Without dead ends: 315 [2018-10-14 16:36:14,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:36:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-14 16:36:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 269. [2018-10-14 16:36:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-14 16:36:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2018-10-14 16:36:14,969 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 202 [2018-10-14 16:36:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:14,970 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2018-10-14 16:36:14,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-14 16:36:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2018-10-14 16:36:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-14 16:36:14,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:14,973 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2018-10-14 16:36:14,973 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:14,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:14,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1337365459, now seen corresponding path program 7 times [2018-10-14 16:36:14,974 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 97 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:15,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:15,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:36:15,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:36:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:36:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:36:15,958 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand 32 states. [2018-10-14 16:36:19,048 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-10-14 16:36:19,215 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-10-14 16:36:19,498 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:36:19,645 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:36:20,095 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:36:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:20,477 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-14 16:36:20,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-14 16:36:20,479 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 225 [2018-10-14 16:36:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:20,481 INFO L225 Difference]: With dead ends: 271 [2018-10-14 16:36:20,481 INFO L226 Difference]: Without dead ends: 271 [2018-10-14 16:36:20,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:36:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-14 16:36:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2018-10-14 16:36:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-14 16:36:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2018-10-14 16:36:20,488 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 225 [2018-10-14 16:36:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:20,489 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2018-10-14 16:36:20,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:36:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2018-10-14 16:36:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-14 16:36:20,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:20,492 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2018-10-14 16:36:20,493 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:20,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2088988570, now seen corresponding path program 8 times [2018-10-14 16:36:20,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 215 proven. 661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:20,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:20,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-14 16:36:20,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-14 16:36:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-14 16:36:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-10-14 16:36:20,918 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand 25 states. [2018-10-14 16:36:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:21,703 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-14 16:36:21,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-14 16:36:21,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 248 [2018-10-14 16:36:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:21,706 INFO L225 Difference]: With dead ends: 459 [2018-10-14 16:36:21,706 INFO L226 Difference]: Without dead ends: 361 [2018-10-14 16:36:21,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2018-10-14 16:36:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-14 16:36:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 315. [2018-10-14 16:36:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-14 16:36:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2018-10-14 16:36:21,714 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 248 [2018-10-14 16:36:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:21,714 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2018-10-14 16:36:21,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-14 16:36:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2018-10-14 16:36:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-14 16:36:21,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:21,716 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2018-10-14 16:36:21,716 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:21,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 629900237, now seen corresponding path program 9 times [2018-10-14 16:36:21,717 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 240 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:22,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:22,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-14 16:36:22,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-14 16:36:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-14 16:36:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2018-10-14 16:36:22,773 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand 34 states. [2018-10-14 16:36:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:28,760 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-10-14 16:36:28,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-14 16:36:28,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 271 [2018-10-14 16:36:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:28,763 INFO L225 Difference]: With dead ends: 317 [2018-10-14 16:36:28,764 INFO L226 Difference]: Without dead ends: 317 [2018-10-14 16:36:28,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1035, Invalid=4817, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 16:36:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-10-14 16:36:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2018-10-14 16:36:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-14 16:36:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2018-10-14 16:36:28,772 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 271 [2018-10-14 16:36:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:28,772 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2018-10-14 16:36:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-14 16:36:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2018-10-14 16:36:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-14 16:36:28,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:28,774 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2018-10-14 16:36:28,775 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:28,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash -434690464, now seen corresponding path program 10 times [2018-10-14 16:36:28,776 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 314 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:29,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:29,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 16:36:29,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 16:36:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 16:36:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-10-14 16:36:29,801 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 29 states. [2018-10-14 16:36:31,157 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-14 16:36:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:31,515 INFO L93 Difference]: Finished difference Result 528 states and 531 transitions. [2018-10-14 16:36:31,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:36:31,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 294 [2018-10-14 16:36:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:31,518 INFO L225 Difference]: With dead ends: 528 [2018-10-14 16:36:31,518 INFO L226 Difference]: Without dead ends: 407 [2018-10-14 16:36:31,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=667, Invalid=2873, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:36:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-14 16:36:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 361. [2018-10-14 16:36:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-14 16:36:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 364 transitions. [2018-10-14 16:36:31,532 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 364 transitions. Word has length 294 [2018-10-14 16:36:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:31,532 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 364 transitions. [2018-10-14 16:36:31,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 16:36:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 364 transitions. [2018-10-14 16:36:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-14 16:36:31,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:31,534 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2018-10-14 16:36:31,534 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:31,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:31,535 INFO L82 PathProgramCache]: Analyzing trace with hash -210642605, now seen corresponding path program 11 times [2018-10-14 16:36:31,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 262 proven. 1319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:33,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:33,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 16:36:33,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 16:36:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 16:36:33,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:36:33,681 INFO L87 Difference]: Start difference. First operand 361 states and 364 transitions. Second operand 40 states. [2018-10-14 16:36:38,516 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:36:38,950 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:36:39,096 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:36:39,521 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:36:39,705 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:36:39,893 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2018-10-14 16:36:40,227 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:36:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:40,599 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2018-10-14 16:36:40,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 16:36:40,600 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2018-10-14 16:36:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:40,603 INFO L225 Difference]: With dead ends: 363 [2018-10-14 16:36:40,603 INFO L226 Difference]: Without dead ends: 363 [2018-10-14 16:36:40,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2018-10-14 16:36:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-14 16:36:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2018-10-14 16:36:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-14 16:36:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 363 transitions. [2018-10-14 16:36:40,612 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 363 transitions. Word has length 317 [2018-10-14 16:36:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:40,613 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 363 transitions. [2018-10-14 16:36:40,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 16:36:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 363 transitions. [2018-10-14 16:36:40,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-14 16:36:40,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:40,615 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2018-10-14 16:36:40,616 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:40,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1118960154, now seen corresponding path program 12 times [2018-10-14 16:36:40,617 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 436 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:41,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:41,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-14 16:36:41,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-14 16:36:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-14 16:36:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:36:41,247 INFO L87 Difference]: Start difference. First operand 361 states and 363 transitions. Second operand 33 states. [2018-10-14 16:36:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:42,304 INFO L93 Difference]: Finished difference Result 597 states and 600 transitions. [2018-10-14 16:36:42,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 16:36:42,305 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 340 [2018-10-14 16:36:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:42,308 INFO L225 Difference]: With dead ends: 597 [2018-10-14 16:36:42,308 INFO L226 Difference]: Without dead ends: 453 [2018-10-14 16:36:42,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=866, Invalid=3826, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:36:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-10-14 16:36:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 407. [2018-10-14 16:36:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-14 16:36:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 410 transitions. [2018-10-14 16:36:42,317 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 410 transitions. Word has length 340 [2018-10-14 16:36:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:42,317 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 410 transitions. [2018-10-14 16:36:42,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-14 16:36:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 410 transitions. [2018-10-14 16:36:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 16:36:42,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:42,319 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2018-10-14 16:36:42,320 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:42,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:42,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1947696077, now seen corresponding path program 13 times [2018-10-14 16:36:42,321 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 379 proven. 1787 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:43,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:43,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 16:36:43,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 16:36:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 16:36:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1744, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:36:43,977 INFO L87 Difference]: Start difference. First operand 407 states and 410 transitions. Second operand 44 states. [2018-10-14 16:36:47,292 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-14 16:36:48,859 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-14 16:36:49,247 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-14 16:36:49,443 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-14 16:36:49,735 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-10-14 16:36:50,096 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-14 16:36:50,305 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:36:50,488 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:36:50,826 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:36:50,981 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-14 16:36:51,422 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-14 16:36:51,573 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-14 16:36:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:52,354 INFO L93 Difference]: Finished difference Result 409 states and 411 transitions. [2018-10-14 16:36:52,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:36:52,355 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 363 [2018-10-14 16:36:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:52,358 INFO L225 Difference]: With dead ends: 409 [2018-10-14 16:36:52,359 INFO L226 Difference]: Without dead ends: 409 [2018-10-14 16:36:52,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1798, Invalid=8914, Unknown=0, NotChecked=0, Total=10712 [2018-10-14 16:36:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-10-14 16:36:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2018-10-14 16:36:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-14 16:36:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2018-10-14 16:36:52,368 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 363 [2018-10-14 16:36:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:52,369 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2018-10-14 16:36:52,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 16:36:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2018-10-14 16:36:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-14 16:36:52,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:52,372 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2018-10-14 16:36:52,372 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:52,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -309055904, now seen corresponding path program 14 times [2018-10-14 16:36:52,373 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2493 backedges. 581 proven. 1912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:53,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:53,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-14 16:36:53,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-14 16:36:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-14 16:36:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 16:36:53,842 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand 37 states. [2018-10-14 16:36:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:55,419 INFO L93 Difference]: Finished difference Result 666 states and 669 transitions. [2018-10-14 16:36:55,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-14 16:36:55,420 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 386 [2018-10-14 16:36:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:55,423 INFO L225 Difference]: With dead ends: 666 [2018-10-14 16:36:55,423 INFO L226 Difference]: Without dead ends: 499 [2018-10-14 16:36:55,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1091, Invalid=4915, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:36:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-10-14 16:36:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 453. [2018-10-14 16:36:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-14 16:36:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 456 transitions. [2018-10-14 16:36:55,431 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 456 transitions. Word has length 386 [2018-10-14 16:36:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:55,432 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 456 transitions. [2018-10-14 16:36:55,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-14 16:36:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 456 transitions. [2018-10-14 16:36:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-14 16:36:55,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:55,435 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2018-10-14 16:36:55,435 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:55,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:55,435 INFO L82 PathProgramCache]: Analyzing trace with hash 669560531, now seen corresponding path program 15 times [2018-10-14 16:36:55,436 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 519 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:57,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:57,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:36:57,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:36:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:36:57,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:36:57,297 INFO L87 Difference]: Start difference. First operand 453 states and 456 transitions. Second operand 48 states. [2018-10-14 16:37:02,489 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:37:02,630 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:03,047 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:03,193 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:03,623 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:03,776 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:04,228 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:04,389 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:04,844 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:05,313 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-14 16:37:05,532 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:37:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:05,957 INFO L93 Difference]: Finished difference Result 455 states and 457 transitions. [2018-10-14 16:37:05,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 16:37:05,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 409 [2018-10-14 16:37:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:05,960 INFO L225 Difference]: With dead ends: 455 [2018-10-14 16:37:05,960 INFO L226 Difference]: Without dead ends: 455 [2018-10-14 16:37:05,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2264, Invalid=11076, Unknown=0, NotChecked=0, Total=13340 [2018-10-14 16:37:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-10-14 16:37:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 453. [2018-10-14 16:37:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-14 16:37:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 455 transitions. [2018-10-14 16:37:05,967 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 455 transitions. Word has length 409 [2018-10-14 16:37:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:05,968 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 455 transitions. [2018-10-14 16:37:05,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:37:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 455 transitions. [2018-10-14 16:37:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-14 16:37:05,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:05,971 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2018-10-14 16:37:05,971 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:05,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:05,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1239223142, now seen corresponding path program 16 times [2018-10-14 16:37:05,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 749 proven. 2467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:07,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:07,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-14 16:37:07,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-14 16:37:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-14 16:37:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2018-10-14 16:37:07,537 INFO L87 Difference]: Start difference. First operand 453 states and 455 transitions. Second operand 41 states. [2018-10-14 16:37:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:09,041 INFO L93 Difference]: Finished difference Result 735 states and 738 transitions. [2018-10-14 16:37:09,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-14 16:37:09,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 432 [2018-10-14 16:37:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:09,044 INFO L225 Difference]: With dead ends: 735 [2018-10-14 16:37:09,044 INFO L226 Difference]: Without dead ends: 545 [2018-10-14 16:37:09,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1342, Invalid=6140, Unknown=0, NotChecked=0, Total=7482 [2018-10-14 16:37:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-10-14 16:37:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 499. [2018-10-14 16:37:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-14 16:37:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 502 transitions. [2018-10-14 16:37:09,052 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 502 transitions. Word has length 432 [2018-10-14 16:37:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:09,053 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 502 transitions. [2018-10-14 16:37:09,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-14 16:37:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 502 transitions. [2018-10-14 16:37:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-10-14 16:37:09,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:09,056 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2018-10-14 16:37:09,056 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:09,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash -696867891, now seen corresponding path program 17 times [2018-10-14 16:37:09,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 846 proven. 2766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:12,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:12,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-14 16:37:12,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-14 16:37:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-14 16:37:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:37:12,868 INFO L87 Difference]: Start difference. First operand 499 states and 502 transitions. Second operand 50 states. [2018-10-14 16:37:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:20,083 INFO L93 Difference]: Finished difference Result 501 states and 503 transitions. [2018-10-14 16:37:20,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-14 16:37:20,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 455 [2018-10-14 16:37:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:20,094 INFO L225 Difference]: With dead ends: 501 [2018-10-14 16:37:20,094 INFO L226 Difference]: Without dead ends: 501 [2018-10-14 16:37:20,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1927, Invalid=11645, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 16:37:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2018-10-14 16:37:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2018-10-14 16:37:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-14 16:37:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 501 transitions. [2018-10-14 16:37:20,104 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 501 transitions. Word has length 455 [2018-10-14 16:37:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:20,104 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 501 transitions. [2018-10-14 16:37:20,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-14 16:37:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 501 transitions. [2018-10-14 16:37:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-14 16:37:20,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:20,109 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2018-10-14 16:37:20,109 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:20,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1901590944, now seen corresponding path program 18 times [2018-10-14 16:37:20,110 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4031 backedges. 940 proven. 3091 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:23,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:23,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-14 16:37:23,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-14 16:37:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-14 16:37:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 16:37:23,169 INFO L87 Difference]: Start difference. First operand 499 states and 501 transitions. Second operand 45 states. [2018-10-14 16:37:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:24,865 INFO L93 Difference]: Finished difference Result 804 states and 807 transitions. [2018-10-14 16:37:24,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-14 16:37:24,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 478 [2018-10-14 16:37:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:24,868 INFO L225 Difference]: With dead ends: 804 [2018-10-14 16:37:24,868 INFO L226 Difference]: Without dead ends: 591 [2018-10-14 16:37:24,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2018-10-14 16:37:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-14 16:37:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 545. [2018-10-14 16:37:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-14 16:37:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 548 transitions. [2018-10-14 16:37:24,876 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 548 transitions. Word has length 478 [2018-10-14 16:37:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:24,877 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 548 transitions. [2018-10-14 16:37:24,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-14 16:37:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 548 transitions. [2018-10-14 16:37:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-10-14 16:37:24,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:24,880 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2018-10-14 16:37:24,880 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:24,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash -46721965, now seen corresponding path program 19 times [2018-10-14 16:37:24,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4473 backedges. 868 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:28,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:28,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 16:37:28,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 16:37:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 16:37:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:37:28,049 INFO L87 Difference]: Start difference. First operand 545 states and 548 transitions. Second operand 56 states. [2018-10-14 16:37:35,434 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:37:35,583 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:36,039 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:36,226 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:36,395 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:37:36,702 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:36,856 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:37,307 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:37,464 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:37,927 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:38,095 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:38,573 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:38,752 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:37:39,235 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:37:39,408 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:37:39,905 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:37:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:40,351 INFO L93 Difference]: Finished difference Result 547 states and 549 transitions. [2018-10-14 16:37:40,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-14 16:37:40,353 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 501 [2018-10-14 16:37:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:40,357 INFO L225 Difference]: With dead ends: 547 [2018-10-14 16:37:40,357 INFO L226 Difference]: Without dead ends: 547 [2018-10-14 16:37:40,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3085, Invalid=15821, Unknown=0, NotChecked=0, Total=18906 [2018-10-14 16:37:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2018-10-14 16:37:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2018-10-14 16:37:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-14 16:37:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 547 transitions. [2018-10-14 16:37:40,364 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 547 transitions. Word has length 501 [2018-10-14 16:37:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:40,365 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 547 transitions. [2018-10-14 16:37:40,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 16:37:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 547 transitions. [2018-10-14 16:37:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-10-14 16:37:40,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:40,368 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2018-10-14 16:37:40,369 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:40,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1731878682, now seen corresponding path program 20 times [2018-10-14 16:37:40,370 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4938 backedges. 1154 proven. 3784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:41,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:41,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-14 16:37:41,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-14 16:37:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-14 16:37:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2018-10-14 16:37:41,749 INFO L87 Difference]: Start difference. First operand 545 states and 547 transitions. Second operand 49 states. [2018-10-14 16:37:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:43,700 INFO L93 Difference]: Finished difference Result 873 states and 876 transitions. [2018-10-14 16:37:43,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 16:37:43,701 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 524 [2018-10-14 16:37:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:43,704 INFO L225 Difference]: With dead ends: 873 [2018-10-14 16:37:43,705 INFO L226 Difference]: Without dead ends: 637 [2018-10-14 16:37:43,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1922, Invalid=8998, Unknown=0, NotChecked=0, Total=10920 [2018-10-14 16:37:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2018-10-14 16:37:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 591. [2018-10-14 16:37:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-14 16:37:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 594 transitions. [2018-10-14 16:37:43,713 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 594 transitions. Word has length 524 [2018-10-14 16:37:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:43,713 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 594 transitions. [2018-10-14 16:37:43,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-14 16:37:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 594 transitions. [2018-10-14 16:37:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-10-14 16:37:43,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:43,717 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 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] [2018-10-14 16:37:43,717 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:43,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1785527245, now seen corresponding path program 21 times [2018-10-14 16:37:43,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5426 backedges. 1077 proven. 4349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:37:46,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:46,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 16:37:46,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 16:37:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 16:37:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3248, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:37:46,487 INFO L87 Difference]: Start difference. First operand 591 states and 594 transitions. Second operand 60 states. [2018-10-14 16:37:54,701 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-14 16:37:54,854 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-14 16:37:55,506 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-14 16:37:55,665 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:37:56,113 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:37:56,275 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:37:56,419 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:37:56,615 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-14 16:37:56,821 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:37:56,992 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:37:57,483 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:37:57,657 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:37:57,816 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:37:58,170 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:37:58,359 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:37:58,880 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:37:59,063 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-14 16:37:59,569 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-14 16:37:59,744 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-14 16:38:00,101 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:38:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:00,560 INFO L93 Difference]: Finished difference Result 593 states and 595 transitions. [2018-10-14 16:38:00,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-14 16:38:00,560 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 547 [2018-10-14 16:38:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:00,563 INFO L225 Difference]: With dead ends: 593 [2018-10-14 16:38:00,564 INFO L226 Difference]: Without dead ends: 593 [2018-10-14 16:38:00,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3392, Invalid=18364, Unknown=0, NotChecked=0, Total=21756 [2018-10-14 16:38:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-14 16:38:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2018-10-14 16:38:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-14 16:38:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 593 transitions. [2018-10-14 16:38:00,571 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 593 transitions. Word has length 547 [2018-10-14 16:38:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:00,572 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 593 transitions. [2018-10-14 16:38:00,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 16:38:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 593 transitions. [2018-10-14 16:38:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-10-14 16:38:00,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:00,576 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2018-10-14 16:38:00,576 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:00,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1863233120, now seen corresponding path program 22 times [2018-10-14 16:38:00,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5937 backedges. 1391 proven. 4546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:02,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:02,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-14 16:38:02,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-14 16:38:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-14 16:38:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2379, Unknown=0, NotChecked=0, Total=2756 [2018-10-14 16:38:02,073 INFO L87 Difference]: Start difference. First operand 591 states and 593 transitions. Second operand 53 states. [2018-10-14 16:38:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:04,034 INFO L93 Difference]: Finished difference Result 942 states and 945 transitions. [2018-10-14 16:38:04,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-14 16:38:04,034 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 570 [2018-10-14 16:38:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:04,037 INFO L225 Difference]: With dead ends: 942 [2018-10-14 16:38:04,037 INFO L226 Difference]: Without dead ends: 683 [2018-10-14 16:38:04,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2251, Invalid=10631, Unknown=0, NotChecked=0, Total=12882 [2018-10-14 16:38:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-10-14 16:38:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 637. [2018-10-14 16:38:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-14 16:38:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 640 transitions. [2018-10-14 16:38:04,046 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 640 transitions. Word has length 570 [2018-10-14 16:38:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:04,047 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 640 transitions. [2018-10-14 16:38:04,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-14 16:38:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 640 transitions. [2018-10-14 16:38:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2018-10-14 16:38:04,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:04,051 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 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] [2018-10-14 16:38:04,051 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:04,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1048119763, now seen corresponding path program 23 times [2018-10-14 16:38:04,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6471 backedges. 1309 proven. 5162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:07,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:07,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 16:38:07,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 16:38:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 16:38:07,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3675, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:38:07,159 INFO L87 Difference]: Start difference. First operand 637 states and 640 transitions. Second operand 64 states. [2018-10-14 16:38:14,461 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:38:14,608 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:15,032 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:15,179 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:15,625 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:15,781 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:16,227 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:16,383 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:16,843 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:17,539 WARN L179 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:18,033 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:18,205 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:18,704 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:18,878 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:19,393 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:19,573 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:38:20,091 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:38:20,276 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:38:20,799 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:38:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:21,285 INFO L93 Difference]: Finished difference Result 639 states and 641 transitions. [2018-10-14 16:38:21,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-14 16:38:21,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 593 [2018-10-14 16:38:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:21,289 INFO L225 Difference]: With dead ends: 639 [2018-10-14 16:38:21,289 INFO L226 Difference]: Without dead ends: 639 [2018-10-14 16:38:21,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4030, Invalid=21410, Unknown=0, NotChecked=0, Total=25440 [2018-10-14 16:38:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-14 16:38:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2018-10-14 16:38:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-14 16:38:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 639 transitions. [2018-10-14 16:38:21,297 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 639 transitions. Word has length 593 [2018-10-14 16:38:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:21,298 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 639 transitions. [2018-10-14 16:38:21,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 16:38:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 639 transitions. [2018-10-14 16:38:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2018-10-14 16:38:21,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:21,302 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 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] [2018-10-14 16:38:21,302 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:21,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -883148390, now seen corresponding path program 24 times [2018-10-14 16:38:21,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7028 backedges. 1651 proven. 5377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:23,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:23,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-14 16:38:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-14 16:38:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-14 16:38:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2759, Unknown=0, NotChecked=0, Total=3192 [2018-10-14 16:38:23,192 INFO L87 Difference]: Start difference. First operand 637 states and 639 transitions. Second operand 57 states. [2018-10-14 16:38:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:25,751 INFO L93 Difference]: Finished difference Result 1011 states and 1014 transitions. [2018-10-14 16:38:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-14 16:38:25,751 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 616 [2018-10-14 16:38:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:25,755 INFO L225 Difference]: With dead ends: 1011 [2018-10-14 16:38:25,755 INFO L226 Difference]: Without dead ends: 729 [2018-10-14 16:38:25,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4301 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2606, Invalid=12400, Unknown=0, NotChecked=0, Total=15006 [2018-10-14 16:38:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2018-10-14 16:38:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 683. [2018-10-14 16:38:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-14 16:38:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 686 transitions. [2018-10-14 16:38:25,763 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 686 transitions. Word has length 616 [2018-10-14 16:38:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:25,763 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 686 transitions. [2018-10-14 16:38:25,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-14 16:38:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 686 transitions. [2018-10-14 16:38:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-14 16:38:25,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:25,768 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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] [2018-10-14 16:38:25,769 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:25,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652749, now seen corresponding path program 25 times [2018-10-14 16:38:25,770 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7608 backedges. 1564 proven. 6044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:29,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:29,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 16:38:29,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 16:38:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 16:38:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4204, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:38:29,515 INFO L87 Difference]: Start difference. First operand 683 states and 686 transitions. Second operand 68 states. [2018-10-14 16:38:39,512 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2018-10-14 16:38:39,661 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2018-10-14 16:38:40,225 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-14 16:38:40,381 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-14 16:38:41,159 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-14 16:38:41,344 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-14 16:38:41,498 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 16:38:41,686 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-14 16:38:42,085 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-14 16:38:42,284 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:38:42,435 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:38:42,677 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:38:42,919 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:38:43,118 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:38:43,272 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:38:43,433 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:38:43,654 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:38:43,859 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:38:44,181 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:38:44,412 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:38:44,632 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-14 16:38:44,794 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 16:38:44,953 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-14 16:38:45,182 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-14 16:38:45,382 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-14 16:38:45,765 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-14 16:38:45,963 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-14 16:38:46,343 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-14 16:38:46,520 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-14 16:38:46,886 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-14 16:38:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:47,373 INFO L93 Difference]: Finished difference Result 685 states and 687 transitions. [2018-10-14 16:38:47,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 16:38:47,374 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 639 [2018-10-14 16:38:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:47,377 INFO L225 Difference]: With dead ends: 685 [2018-10-14 16:38:47,378 INFO L226 Difference]: Without dead ends: 685 [2018-10-14 16:38:47,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7523 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4045, Invalid=24011, Unknown=0, NotChecked=0, Total=28056 [2018-10-14 16:38:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-10-14 16:38:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2018-10-14 16:38:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-14 16:38:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 685 transitions. [2018-10-14 16:38:47,387 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 685 transitions. Word has length 639 [2018-10-14 16:38:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:47,387 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 685 transitions. [2018-10-14 16:38:47,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 16:38:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 685 transitions. [2018-10-14 16:38:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-10-14 16:38:47,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:47,392 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 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] [2018-10-14 16:38:47,393 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:47,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2139367008, now seen corresponding path program 26 times [2018-10-14 16:38:47,394 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8211 backedges. 1934 proven. 6277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:50,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:50,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-14 16:38:50,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-14 16:38:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-14 16:38:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2018-10-14 16:38:50,456 INFO L87 Difference]: Start difference. First operand 683 states and 685 transitions. Second operand 61 states. [2018-10-14 16:38:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:53,545 INFO L93 Difference]: Finished difference Result 1080 states and 1083 transitions. [2018-10-14 16:38:53,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 16:38:53,545 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 662 [2018-10-14 16:38:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:53,548 INFO L225 Difference]: With dead ends: 1080 [2018-10-14 16:38:53,548 INFO L226 Difference]: Without dead ends: 775 [2018-10-14 16:38:53,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4996 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2987, Invalid=14305, Unknown=0, NotChecked=0, Total=17292 [2018-10-14 16:38:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-10-14 16:38:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 729. [2018-10-14 16:38:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-14 16:38:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 732 transitions. [2018-10-14 16:38:53,558 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 732 transitions. Word has length 662 [2018-10-14 16:38:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:53,559 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 732 transitions. [2018-10-14 16:38:53,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-14 16:38:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 732 transitions. [2018-10-14 16:38:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-10-14 16:38:53,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:53,564 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 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] [2018-10-14 16:38:53,564 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:53,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 835358547, now seen corresponding path program 27 times [2018-10-14 16:38:53,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 1842 proven. 6995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:38:57,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:57,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 16:38:57,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 16:38:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 16:38:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=4647, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:38:57,520 INFO L87 Difference]: Start difference. First operand 729 states and 732 transitions. Second operand 72 states. [2018-10-14 16:39:08,257 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-10-14 16:39:08,941 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:39:09,096 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:09,539 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:09,686 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:10,177 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:10,328 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:10,780 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:10,941 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:11,408 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:11,572 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:12,059 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:12,241 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:12,746 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:12,928 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:13,261 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:39:13,542 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:13,736 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:14,273 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:14,461 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:15,011 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:15,225 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:39:15,777 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:39:15,971 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:39:16,522 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:39:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:39:17,068 INFO L93 Difference]: Finished difference Result 731 states and 733 transitions. [2018-10-14 16:39:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-14 16:39:17,068 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 685 [2018-10-14 16:39:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:39:17,070 INFO L225 Difference]: With dead ends: 731 [2018-10-14 16:39:17,070 INFO L226 Difference]: Without dead ends: 731 [2018-10-14 16:39:17,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9078 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=5099, Invalid=27843, Unknown=0, NotChecked=0, Total=32942 [2018-10-14 16:39:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2018-10-14 16:39:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2018-10-14 16:39:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-14 16:39:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 731 transitions. [2018-10-14 16:39:17,078 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 731 transitions. Word has length 685 [2018-10-14 16:39:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:39:17,078 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 731 transitions. [2018-10-14 16:39:17,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 16:39:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 731 transitions. [2018-10-14 16:39:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-10-14 16:39:17,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:39:17,084 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 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] [2018-10-14 16:39:17,084 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:39:17,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:39:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2095875098, now seen corresponding path program 28 times [2018-10-14 16:39:17,085 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:39:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:39:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9486 backedges. 2240 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:39:19,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:39:19,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-14 16:39:19,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-14 16:39:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-14 16:39:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 16:39:19,199 INFO L87 Difference]: Start difference. First operand 729 states and 731 transitions. Second operand 65 states. [2018-10-14 16:39:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:39:22,437 INFO L93 Difference]: Finished difference Result 1149 states and 1152 transitions. [2018-10-14 16:39:22,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:39:22,437 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 708 [2018-10-14 16:39:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:39:22,441 INFO L225 Difference]: With dead ends: 1149 [2018-10-14 16:39:22,441 INFO L226 Difference]: Without dead ends: 821 [2018-10-14 16:39:22,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3394, Invalid=16346, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 16:39:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2018-10-14 16:39:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 775. [2018-10-14 16:39:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-14 16:39:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 778 transitions. [2018-10-14 16:39:22,448 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 778 transitions. Word has length 708 [2018-10-14 16:39:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:39:22,449 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 778 transitions. [2018-10-14 16:39:22,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-14 16:39:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 778 transitions. [2018-10-14 16:39:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2018-10-14 16:39:22,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:39:22,454 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 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] [2018-10-14 16:39:22,455 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:39:22,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:39:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1194277837, now seen corresponding path program 29 times [2018-10-14 16:39:22,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:39:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:39:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10158 backedges. 2143 proven. 8015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:39:27,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:39:27,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 16:39:27,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 16:39:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 16:39:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5200, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:39:27,059 INFO L87 Difference]: Start difference. First operand 775 states and 778 transitions. Second operand 76 states. [2018-10-14 16:39:38,864 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2018-10-14 16:39:39,149 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-14 16:39:39,308 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-14 16:39:39,979 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-14 16:39:40,145 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:40,612 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:40,794 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:41,276 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:41,465 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:41,953 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:42,129 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:42,628 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:42,808 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:43,325 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:43,513 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:44,105 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:44,327 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:44,869 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:45,076 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:45,658 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:45,865 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:39:46,454 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:39:46,664 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-14 16:39:47,238 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-14 16:39:47,442 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-14 16:39:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:39:48,395 INFO L93 Difference]: Finished difference Result 777 states and 779 transitions. [2018-10-14 16:39:48,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 16:39:48,395 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 731 [2018-10-14 16:39:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:39:48,399 INFO L225 Difference]: With dead ends: 777 [2018-10-14 16:39:48,400 INFO L226 Difference]: Without dead ends: 777 [2018-10-14 16:39:48,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10188 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=5482, Invalid=31190, Unknown=0, NotChecked=0, Total=36672 [2018-10-14 16:39:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2018-10-14 16:39:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775. [2018-10-14 16:39:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-14 16:39:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 777 transitions. [2018-10-14 16:39:48,408 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 777 transitions. Word has length 731 [2018-10-14 16:39:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:39:48,408 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 777 transitions. [2018-10-14 16:39:48,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 16:39:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 777 transitions. [2018-10-14 16:39:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2018-10-14 16:39:48,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:39:48,414 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 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] [2018-10-14 16:39:48,414 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:39:48,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:39:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1144754592, now seen corresponding path program 30 times [2018-10-14 16:39:48,415 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:39:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:39:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 2569 proven. 8284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:39:50,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:39:50,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-14 16:39:50,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-14 16:39:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-14 16:39:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=4067, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:39:50,669 INFO L87 Difference]: Start difference. First operand 775 states and 777 transitions. Second operand 69 states. [2018-10-14 16:39:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:39:53,691 INFO L93 Difference]: Finished difference Result 1218 states and 1221 transitions. [2018-10-14 16:39:53,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-14 16:39:53,691 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 754 [2018-10-14 16:39:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:39:53,694 INFO L225 Difference]: With dead ends: 1218 [2018-10-14 16:39:53,694 INFO L226 Difference]: Without dead ends: 867 [2018-10-14 16:39:53,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3827, Invalid=18523, Unknown=0, NotChecked=0, Total=22350 [2018-10-14 16:39:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-14 16:39:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 821. [2018-10-14 16:39:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-14 16:39:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 824 transitions. [2018-10-14 16:39:53,703 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 824 transitions. Word has length 754 [2018-10-14 16:39:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:39:53,703 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 824 transitions. [2018-10-14 16:39:53,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-14 16:39:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 824 transitions. [2018-10-14 16:39:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-10-14 16:39:53,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:39:53,709 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 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] [2018-10-14 16:39:53,709 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:39:53,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:39:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1481090259, now seen corresponding path program 31 times [2018-10-14 16:39:53,711 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:39:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:39:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11571 backedges. 2467 proven. 9104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:39:58,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:39:58,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:39:58,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:39:58,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:39:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5731, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:39:58,683 INFO L87 Difference]: Start difference. First operand 821 states and 824 transitions. Second operand 80 states. [2018-10-14 16:40:08,793 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:40:08,935 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:09,368 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:09,516 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:09,727 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:40:09,930 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:40:10,105 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:10,254 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:10,718 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:10,873 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:11,357 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:11,517 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:12,004 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:12,173 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:12,698 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:12,870 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:13,386 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:13,564 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:14,091 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:14,278 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:14,908 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:15,123 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:15,681 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:15,881 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:16,449 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:16,654 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:40:17,228 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:40:17,435 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:40:18,014 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:40:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:40:18,563 INFO L93 Difference]: Finished difference Result 823 states and 825 transitions. [2018-10-14 16:40:18,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 16:40:18,564 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 777 [2018-10-14 16:40:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:40:18,568 INFO L225 Difference]: With dead ends: 823 [2018-10-14 16:40:18,568 INFO L226 Difference]: Without dead ends: 823 [2018-10-14 16:40:18,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11663 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=6292, Invalid=35120, Unknown=0, NotChecked=0, Total=41412 [2018-10-14 16:40:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-10-14 16:40:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 821. [2018-10-14 16:40:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-14 16:40:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 823 transitions. [2018-10-14 16:40:18,576 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 823 transitions. Word has length 777 [2018-10-14 16:40:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:40:18,576 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 823 transitions. [2018-10-14 16:40:18,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:40:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 823 transitions. [2018-10-14 16:40:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2018-10-14 16:40:18,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:40:18,583 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 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] [2018-10-14 16:40:18,583 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:40:18,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:40:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2068790938, now seen corresponding path program 32 times [2018-10-14 16:40:18,584 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:40:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12312 backedges. 2921 proven. 9391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:40:21,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:40:21,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-14 16:40:21,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-14 16:40:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-14 16:40:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2018-10-14 16:40:21,300 INFO L87 Difference]: Start difference. First operand 821 states and 823 transitions. Second operand 73 states. [2018-10-14 16:40:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:40:24,826 INFO L93 Difference]: Finished difference Result 1287 states and 1290 transitions. [2018-10-14 16:40:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 16:40:24,827 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 800 [2018-10-14 16:40:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:40:24,830 INFO L225 Difference]: With dead ends: 1287 [2018-10-14 16:40:24,830 INFO L226 Difference]: Without dead ends: 913 [2018-10-14 16:40:24,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7393 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4286, Invalid=20836, Unknown=0, NotChecked=0, Total=25122 [2018-10-14 16:40:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2018-10-14 16:40:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 867. [2018-10-14 16:40:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-14 16:40:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2018-10-14 16:40:24,838 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 800 [2018-10-14 16:40:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:40:24,839 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2018-10-14 16:40:24,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-14 16:40:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2018-10-14 16:40:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-10-14 16:40:24,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:40:24,844 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 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] [2018-10-14 16:40:24,844 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:40:24,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:40:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash 881009613, now seen corresponding path program 33 times [2018-10-14 16:40:24,845 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:40:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:40:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13076 backedges. 3162 proven. 9914 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:40:30,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:40:30,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-14 16:40:30,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-14 16:40:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-14 16:40:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=6187, Unknown=0, NotChecked=0, Total=6642 [2018-10-14 16:40:30,689 INFO L87 Difference]: Start difference. First operand 867 states and 870 transitions. Second operand 82 states. [2018-10-14 16:40:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:40:47,709 INFO L93 Difference]: Finished difference Result 869 states and 871 transitions. [2018-10-14 16:40:47,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-14 16:40:47,709 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 823 [2018-10-14 16:40:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:40:47,713 INFO L225 Difference]: With dead ends: 869 [2018-10-14 16:40:47,713 INFO L226 Difference]: Without dead ends: 869 [2018-10-14 16:40:47,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11688 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=4383, Invalid=34229, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 16:40:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2018-10-14 16:40:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2018-10-14 16:40:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-14 16:40:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 869 transitions. [2018-10-14 16:40:47,720 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 869 transitions. Word has length 823 [2018-10-14 16:40:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:40:47,721 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 869 transitions. [2018-10-14 16:40:47,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-14 16:40:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 869 transitions. [2018-10-14 16:40:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2018-10-14 16:40:47,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:40:47,726 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 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] [2018-10-14 16:40:47,726 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:40:47,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:40:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash -359954848, now seen corresponding path program 34 times [2018-10-14 16:40:47,727 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:40:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:40:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13863 backedges. 3296 proven. 10567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:40:50,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:40:50,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-14 16:40:50,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-14 16:40:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-14 16:40:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 16:40:50,010 INFO L87 Difference]: Start difference. First operand 867 states and 869 transitions. Second operand 77 states. [2018-10-14 16:40:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:40:54,687 INFO L93 Difference]: Finished difference Result 1356 states and 1359 transitions. [2018-10-14 16:40:54,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-14 16:40:54,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 846 [2018-10-14 16:40:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:40:54,691 INFO L225 Difference]: With dead ends: 1356 [2018-10-14 16:40:54,691 INFO L226 Difference]: Without dead ends: 959 [2018-10-14 16:40:54,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8296 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4771, Invalid=23285, Unknown=0, NotChecked=0, Total=28056 [2018-10-14 16:40:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-10-14 16:40:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 913. [2018-10-14 16:40:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-14 16:40:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 916 transitions. [2018-10-14 16:40:54,700 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 916 transitions. Word has length 846 [2018-10-14 16:40:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:40:54,700 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 916 transitions. [2018-10-14 16:40:54,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-14 16:40:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 916 transitions. [2018-10-14 16:40:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2018-10-14 16:40:54,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:40:54,706 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 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] [2018-10-14 16:40:54,706 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:40:54,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:40:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash 772557395, now seen corresponding path program 35 times [2018-10-14 16:40:54,707 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:40:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:41:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14673 backedges. 3184 proven. 11489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:41:00,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:41:00,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-14 16:41:00,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-14 16:41:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-14 16:41:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=6927, Unknown=0, NotChecked=0, Total=7656 [2018-10-14 16:41:00,625 INFO L87 Difference]: Start difference. First operand 913 states and 916 transitions. Second operand 88 states. [2018-10-14 16:41:11,388 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-10-14 16:41:11,911 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:41:12,056 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:12,495 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:12,641 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:13,099 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:13,245 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:13,712 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:13,868 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:14,348 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:14,510 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:14,998 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:15,169 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:15,506 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:41:15,701 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:15,876 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:16,228 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:41:16,483 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:16,665 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:17,204 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:17,394 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:17,943 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:18,132 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:18,687 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:18,889 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:19,465 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:19,673 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:20,282 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:20,494 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:21,092 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:21,331 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:41:21,995 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:41:22,215 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:41:22,836 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:41:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:41:23,471 INFO L93 Difference]: Finished difference Result 915 states and 917 transitions. [2018-10-14 16:41:23,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-14 16:41:23,471 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 869 [2018-10-14 16:41:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:41:23,476 INFO L225 Difference]: With dead ends: 915 [2018-10-14 16:41:23,476 INFO L226 Difference]: Without dead ends: 915 [2018-10-14 16:41:23,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14572 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=7609, Invalid=43241, Unknown=0, NotChecked=0, Total=50850 [2018-10-14 16:41:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-10-14 16:41:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 913. [2018-10-14 16:41:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-14 16:41:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 915 transitions. [2018-10-14 16:41:23,484 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 915 transitions. Word has length 869 [2018-10-14 16:41:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:41:23,484 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 915 transitions. [2018-10-14 16:41:23,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-14 16:41:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 915 transitions. [2018-10-14 16:41:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-14 16:41:23,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:41:23,489 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 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] [2018-10-14 16:41:23,490 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:41:23,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:41:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1793616154, now seen corresponding path program 36 times [2018-10-14 16:41:23,491 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:41:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:41:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15506 backedges. 3694 proven. 11812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:41:25,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:41:26,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-14 16:41:26,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-14 16:41:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-14 16:41:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=5627, Unknown=0, NotChecked=0, Total=6480 [2018-10-14 16:41:26,001 INFO L87 Difference]: Start difference. First operand 913 states and 915 transitions. Second operand 81 states. [2018-10-14 16:41:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:41:31,140 INFO L93 Difference]: Finished difference Result 1425 states and 1428 transitions. [2018-10-14 16:41:31,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 16:41:31,140 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 892 [2018-10-14 16:41:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:41:31,144 INFO L225 Difference]: With dead ends: 1425 [2018-10-14 16:41:31,144 INFO L226 Difference]: Without dead ends: 1005 [2018-10-14 16:41:31,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9251 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5282, Invalid=25870, Unknown=0, NotChecked=0, Total=31152 [2018-10-14 16:41:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2018-10-14 16:41:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 959. [2018-10-14 16:41:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-14 16:41:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 962 transitions. [2018-10-14 16:41:31,151 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 962 transitions. Word has length 892 [2018-10-14 16:41:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:41:31,152 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 962 transitions. [2018-10-14 16:41:31,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-14 16:41:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 962 transitions. [2018-10-14 16:41:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-14 16:41:31,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:41:31,158 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 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] [2018-10-14 16:41:31,158 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:41:31,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:41:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash 478034893, now seen corresponding path program 37 times [2018-10-14 16:41:31,159 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:41:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:41:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16362 backedges. 3577 proven. 12785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:41:37,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:41:37,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-10-14 16:41:37,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-14 16:41:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-14 16:41:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=7600, Unknown=0, NotChecked=0, Total=8372 [2018-10-14 16:41:37,473 INFO L87 Difference]: Start difference. First operand 959 states and 962 transitions. Second operand 92 states. [2018-10-14 16:41:54,384 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-14 16:41:54,534 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-14 16:41:55,277 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-14 16:41:55,438 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:55,915 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:56,076 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:56,568 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:56,736 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:57,046 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-14 16:41:57,295 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:57,545 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:58,059 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:58,241 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:58,763 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:58,953 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:59,138 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:41:59,312 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-14 16:41:59,546 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:41:59,749 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:41:59,929 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:42:00,327 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:00,529 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:01,109 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:01,317 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:01,914 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:02,125 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:02,346 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:42:02,548 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-14 16:42:02,796 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:03,018 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:03,635 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:03,864 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:04,497 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:04,732 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-14 16:42:05,381 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-14 16:42:05,624 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-14 16:42:06,279 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-14 16:42:06,544 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-14 16:42:06,992 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:42:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:42:07,771 INFO L93 Difference]: Finished difference Result 961 states and 963 transitions. [2018-10-14 16:42:07,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-14 16:42:07,772 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 915 [2018-10-14 16:42:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:42:07,777 INFO L225 Difference]: With dead ends: 961 [2018-10-14 16:42:07,777 INFO L226 Difference]: Without dead ends: 961 [2018-10-14 16:42:07,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15970 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=8068, Invalid=47392, Unknown=0, NotChecked=0, Total=55460 [2018-10-14 16:42:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2018-10-14 16:42:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2018-10-14 16:42:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-14 16:42:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 961 transitions. [2018-10-14 16:42:07,785 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 961 transitions. Word has length 915 [2018-10-14 16:42:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:42:07,785 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 961 transitions. [2018-10-14 16:42:07,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-14 16:42:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 961 transitions. [2018-10-14 16:42:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2018-10-14 16:42:07,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:42:07,791 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 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] [2018-10-14 16:42:07,791 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:42:07,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:42:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1570074208, now seen corresponding path program 38 times [2018-10-14 16:42:07,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:42:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:42:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17241 backedges. 4115 proven. 13126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:42:10,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:42:10,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-14 16:42:10,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-14 16:42:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-14 16:42:10,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=6203, Unknown=0, NotChecked=0, Total=7140 [2018-10-14 16:42:10,932 INFO L87 Difference]: Start difference. First operand 959 states and 961 transitions. Second operand 85 states. [2018-10-14 16:42:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:42:16,321 INFO L93 Difference]: Finished difference Result 1494 states and 1497 transitions. [2018-10-14 16:42:16,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-14 16:42:16,321 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 938 [2018-10-14 16:42:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:42:16,326 INFO L225 Difference]: With dead ends: 1494 [2018-10-14 16:42:16,326 INFO L226 Difference]: Without dead ends: 1051 [2018-10-14 16:42:16,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10258 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5819, Invalid=28591, Unknown=0, NotChecked=0, Total=34410 [2018-10-14 16:42:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2018-10-14 16:42:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1005. [2018-10-14 16:42:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-14 16:42:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1008 transitions. [2018-10-14 16:42:16,336 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1008 transitions. Word has length 938 [2018-10-14 16:42:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:42:16,336 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1008 transitions. [2018-10-14 16:42:16,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-14 16:42:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1008 transitions. [2018-10-14 16:42:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2018-10-14 16:42:16,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:42:16,342 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 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] [2018-10-14 16:42:16,342 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:42:16,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:42:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash -365658157, now seen corresponding path program 39 times [2018-10-14 16:42:16,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:42:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:42:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18143 backedges. 3993 proven. 14150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:42:23,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:42:23,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-10-14 16:42:23,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-14 16:42:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-14 16:42:23,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=8235, Unknown=0, NotChecked=0, Total=9120 [2018-10-14 16:42:23,131 INFO L87 Difference]: Start difference. First operand 1005 states and 1008 transitions. Second operand 96 states. [2018-10-14 16:42:41,206 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:42:41,348 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:41,796 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:41,939 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:42,417 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:42,567 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:43,058 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:43,237 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:43,449 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:42:43,811 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:43,970 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:44,469 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:44,638 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:45,154 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:45,333 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:45,865 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:46,051 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:46,596 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:46,784 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:47,343 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:47,536 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:48,105 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:48,326 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:48,578 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:42:49,017 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:49,223 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:49,821 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:50,035 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:50,255 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:42:50,675 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:50,919 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:51,530 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:51,746 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:52,385 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:52,610 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:42:53,254 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:42:53,527 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-14 16:42:54,256 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-14 16:42:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:42:54,905 INFO L93 Difference]: Finished difference Result 1007 states and 1009 transitions. [2018-10-14 16:42:54,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-14 16:42:54,905 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 961 [2018-10-14 16:42:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:42:54,910 INFO L225 Difference]: With dead ends: 1007 [2018-10-14 16:42:54,910 INFO L226 Difference]: Without dead ends: 1007 [2018-10-14 16:42:54,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=9050, Invalid=52206, Unknown=0, NotChecked=0, Total=61256 [2018-10-14 16:42:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-10-14 16:42:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1005. [2018-10-14 16:42:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-14 16:42:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1007 transitions. [2018-10-14 16:42:54,921 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1007 transitions. Word has length 961 [2018-10-14 16:42:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:42:54,922 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1007 transitions. [2018-10-14 16:42:54,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-14 16:42:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1007 transitions. [2018-10-14 16:42:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2018-10-14 16:42:54,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:42:54,930 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 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] [2018-10-14 16:42:54,931 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:42:54,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:42:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash -719584358, now seen corresponding path program 40 times [2018-10-14 16:42:54,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:42:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:42:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19068 backedges. 4559 proven. 14509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:42:58,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:42:58,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-14 16:42:58,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-14 16:42:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-14 16:42:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=6807, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 16:42:58,310 INFO L87 Difference]: Start difference. First operand 1005 states and 1007 transitions. Second operand 89 states. [2018-10-14 16:43:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:43:03,542 INFO L93 Difference]: Finished difference Result 1563 states and 1566 transitions. [2018-10-14 16:43:03,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-14 16:43:03,542 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 984 [2018-10-14 16:43:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:43:03,547 INFO L225 Difference]: With dead ends: 1563 [2018-10-14 16:43:03,547 INFO L226 Difference]: Without dead ends: 1097 [2018-10-14 16:43:03,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11317 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6382, Invalid=31448, Unknown=0, NotChecked=0, Total=37830 [2018-10-14 16:43:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-10-14 16:43:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1051. [2018-10-14 16:43:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-14 16:43:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1054 transitions. [2018-10-14 16:43:03,558 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1054 transitions. Word has length 984 [2018-10-14 16:43:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:43:03,558 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1054 transitions. [2018-10-14 16:43:03,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-14 16:43:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1054 transitions. [2018-10-14 16:43:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2018-10-14 16:43:03,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:43:03,565 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 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] [2018-10-14 16:43:03,565 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:43:03,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:43:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 98862029, now seen corresponding path program 41 times [2018-10-14 16:43:03,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:43:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:43:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20016 backedges. 4432 proven. 15584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:43:10,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:43:10,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-10-14 16:43:10,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-14 16:43:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-14 16:43:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=9036, Unknown=0, NotChecked=0, Total=9900 [2018-10-14 16:43:10,910 INFO L87 Difference]: Start difference. First operand 1051 states and 1054 transitions. Second operand 100 states. [2018-10-14 16:43:30,609 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2018-10-14 16:43:30,969 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2018-10-14 16:43:31,312 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-14 16:43:31,478 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-14 16:43:32,421 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-14 16:43:32,617 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-14 16:43:32,789 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 16:43:32,999 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-14 16:43:33,492 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-14 16:43:33,692 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:34,023 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:34,254 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:34,492 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:34,694 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:34,868 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:35,100 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:35,308 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:35,478 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:35,659 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:35,909 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:36,133 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:36,313 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:36,500 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:36,749 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:36,967 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:37,144 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:37,327 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:37,577 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:37,816 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:37,999 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:38,187 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:38,449 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:38,683 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:38,881 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:39,109 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:39,381 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:39,663 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:39,881 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:40,070 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:40,349 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:40,600 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:40,798 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:40,995 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:41,275 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:41,531 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:41,730 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:41,924 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:42,207 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:42,472 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-14 16:43:42,689 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:43:42,899 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-14 16:43:43,206 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-14 16:43:43,486 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-14 16:43:43,706 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 16:43:43,918 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-14 16:43:44,229 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-14 16:43:44,497 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-14 16:43:44,745 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2018-10-14 16:43:45,093 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-14 16:43:45,356 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-14 16:43:45,930 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-14 16:43:46,174 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-14 16:43:46,662 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-14 16:43:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:43:47,367 INFO L93 Difference]: Finished difference Result 1053 states and 1055 transitions. [2018-10-14 16:43:47,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-14 16:43:47,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1007 [2018-10-14 16:43:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:43:47,370 INFO L225 Difference]: With dead ends: 1053 [2018-10-14 16:43:47,370 INFO L226 Difference]: Without dead ends: 1053 [2018-10-14 16:43:47,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18943 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=9025, Invalid=56255, Unknown=0, NotChecked=0, Total=65280 [2018-10-14 16:43:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2018-10-14 16:43:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1051. [2018-10-14 16:43:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-14 16:43:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1053 transitions. [2018-10-14 16:43:47,379 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1053 transitions. Word has length 1007 [2018-10-14 16:43:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:43:47,380 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1053 transitions. [2018-10-14 16:43:47,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-14 16:43:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1053 transitions. [2018-10-14 16:43:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-10-14 16:43:47,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:43:47,386 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 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] [2018-10-14 16:43:47,387 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:43:47,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:43:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1315035552, now seen corresponding path program 42 times [2018-10-14 16:43:47,387 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:43:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:43:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20987 backedges. 5026 proven. 15961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:43:50,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:43:50,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-14 16:43:50,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-14 16:43:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-14 16:43:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=7439, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 16:43:50,786 INFO L87 Difference]: Start difference. First operand 1051 states and 1053 transitions. Second operand 93 states. [2018-10-14 16:43:54,195 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-14 16:43:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:43:57,903 INFO L93 Difference]: Finished difference Result 1632 states and 1635 transitions. [2018-10-14 16:43:57,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 16:43:57,903 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1030 [2018-10-14 16:43:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:43:57,907 INFO L225 Difference]: With dead ends: 1632 [2018-10-14 16:43:57,907 INFO L226 Difference]: Without dead ends: 1143 [2018-10-14 16:43:57,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12428 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6971, Invalid=34441, Unknown=0, NotChecked=0, Total=41412 [2018-10-14 16:43:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-10-14 16:43:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1097. [2018-10-14 16:43:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-10-14 16:43:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1100 transitions. [2018-10-14 16:43:57,919 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1100 transitions. Word has length 1030 [2018-10-14 16:43:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:43:57,919 INFO L481 AbstractCegarLoop]: Abstraction has 1097 states and 1100 transitions. [2018-10-14 16:43:57,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-14 16:43:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1100 transitions. [2018-10-14 16:43:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2018-10-14 16:43:57,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:43:57,926 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 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] [2018-10-14 16:43:57,927 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:43:57,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:43:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1054623059, now seen corresponding path program 43 times [2018-10-14 16:43:57,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:43:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21981 backedges. 4894 proven. 17087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:06,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:06,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-10-14 16:44:06,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-14 16:44:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-14 16:44:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=9655, Unknown=0, NotChecked=0, Total=10712 [2018-10-14 16:44:06,168 INFO L87 Difference]: Start difference. First operand 1097 states and 1100 transitions. Second operand 104 states. [2018-10-14 16:44:28,391 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:44:28,541 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:29,014 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:29,170 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:29,655 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:29,810 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:30,119 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:44:30,319 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:30,484 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:30,861 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:44:31,087 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:31,252 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:31,775 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:31,951 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:32,479 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:32,654 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:33,198 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:33,393 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:33,966 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:34,161 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:34,549 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-14 16:44:34,769 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:34,970 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:35,553 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:35,769 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-14 16:44:36,003 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-14 16:44:36,462 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-14 16:44:36,680 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62