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 0.1.23-502d2f4 [2018-10-12 20:55:39,492 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 20:55:39,494 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 20:55:39,506 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 20:55:39,506 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 20:55:39,508 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 20:55:39,509 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 20:55:39,511 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 20:55:39,513 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 20:55:39,513 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 20:55:39,514 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-12 20:55:39,515 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-12 20:55:39,516 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-12 20:55:39,517 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-12 20:55:39,520 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-12 20:55:39,521 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-12 20:55:39,521 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-12 20:55:39,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-12 20:55:39,531 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-12 20:55:39,536 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-12 20:55:39,540 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-12 20:55:39,541 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-12 20:55:39,544 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-12 20:55:39,561 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 20:55:39,579 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 20:55:39,579 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 20:55:39,580 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 20:55:39,580 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 20:55:39,581 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 20:55:39,581 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 20:55:39,582 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 20:55:39,585 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 20:55:39,585 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 20:55:39,586 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 20:55:39,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 20:55:39,586 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 20:55:39,586 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 20:55:39,588 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 20:55:39,588 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 20:55:39,652 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 20:55:39,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 20:55:39,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 20:55:39,675 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 20:55:39,676 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 20:55:39,677 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-12 20:55:39,677 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl' [2018-10-12 20:55:39,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 20:55:39,740 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-12 20:55:39,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 20:55:39,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 20:55:39,741 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 20:55:39,766 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,768 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,779 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,780 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,784 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,786 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,788 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 12.10 08:55:39" (1/1) ... [2018-10-12 20:55:39,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 20:55:39,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 20:55:39,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 20:55:39,791 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 20:55:39,792 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 12.10 08:55:39" (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 [2018-10-12 20:55:39,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 20:55:39,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 20:55:39,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 20:55:40,387 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 20:55:40,388 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 12.10 08:55:40 BoogieIcfgContainer [2018-10-12 20:55:40,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 20:55:40,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 20:55:40,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 20:55:40,395 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 20:55:40,396 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 12.10 08:55:39" (1/2) ... [2018-10-12 20:55:40,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b0c48d and model type bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:55:40, skipping insertion in model container [2018-10-12 20:55:40,398 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 12.10 08:55:40" (2/2) ... [2018-10-12 20:55:40,401 INFO L112 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-12 20:55:40,412 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 20:55:40,421 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 20:55:40,439 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 20:55:40,472 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 20:55:40,473 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 20:55:40,473 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 20:55:40,474 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 20:55:40,474 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 20:55:40,474 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 20:55:40,474 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 20:55:40,474 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 20:55:40,474 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 20:55:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-10-12 20:55:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-12 20:55:40,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:40,526 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] [2018-10-12 20:55:40,528 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:40,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:40,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1412051856, now seen corresponding path program 1 times [2018-10-12 20:55:40,603 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:41,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:55:41,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-12 20:55:41,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-12 20:55:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-12 20:55:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-12 20:55:41,428 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 12 states. [2018-10-12 20:55:42,223 WARN L178 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-10-12 20:55:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:42,628 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2018-10-12 20:55:42,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-12 20:55:42,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-10-12 20:55:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:42,647 INFO L225 Difference]: With dead ends: 94 [2018-10-12 20:55:42,647 INFO L226 Difference]: Without dead ends: 94 [2018-10-12 20:55:42,650 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 [2018-10-12 20:55:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-12 20:55:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2018-10-12 20:55:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-12 20:55:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-12 20:55:42,694 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 35 [2018-10-12 20:55:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:42,695 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-12 20:55:42,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-12 20:55:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-12 20:55:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-12 20:55:42,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:42,698 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] [2018-10-12 20:55:42,698 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:42,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash -776350115, now seen corresponding path program 1 times [2018-10-12 20:55:42,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:43,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:43,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-12 20:55:43,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-12 20:55:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-12 20:55:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-12 20:55:43,229 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 15 states. [2018-10-12 20:55:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:44,826 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-12 20:55:44,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-12 20:55:44,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-10-12 20:55:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:44,831 INFO L225 Difference]: With dead ends: 155 [2018-10-12 20:55:44,831 INFO L226 Difference]: Without dead ends: 155 [2018-10-12 20:55:44,833 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 [2018-10-12 20:55:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-12 20:55:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 85. [2018-10-12 20:55:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-12 20:55:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2018-10-12 20:55:44,846 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 58 [2018-10-12 20:55:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:44,846 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2018-10-12 20:55:44,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-12 20:55:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2018-10-12 20:55:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-12 20:55:44,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:44,850 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] [2018-10-12 20:55:44,850 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:44,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1496518192, now seen corresponding path program 2 times [2018-10-12 20:55:44,851 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:45,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:45,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-12 20:55:45,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-12 20:55:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-12 20:55:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-10-12 20:55:45,407 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 19 states. [2018-10-12 20:55:45,802 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-12 20:55:46,405 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-10-12 20:55:47,060 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-10-12 20:55:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:47,743 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-12 20:55:47,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-12 20:55:47,744 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2018-10-12 20:55:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:47,748 INFO L225 Difference]: With dead ends: 161 [2018-10-12 20:55:47,748 INFO L226 Difference]: Without dead ends: 161 [2018-10-12 20:55:47,750 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 [2018-10-12 20:55:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-12 20:55:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-12 20:55:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-12 20:55:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2018-10-12 20:55:47,760 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 81 [2018-10-12 20:55:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:47,761 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2018-10-12 20:55:47,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-12 20:55:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2018-10-12 20:55:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-12 20:55:47,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:47,764 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] [2018-10-12 20:55:47,765 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:47,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1037220109, now seen corresponding path program 1 times [2018-10-12 20:55:47,766 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-12 20:55:47,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:55:47,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-12 20:55:47,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-12 20:55:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-12 20:55:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-12 20:55:47,907 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 6 states. [2018-10-12 20:55:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:48,237 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2018-10-12 20:55:48,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-12 20:55:48,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2018-10-12 20:55:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:48,239 INFO L225 Difference]: With dead ends: 136 [2018-10-12 20:55:48,240 INFO L226 Difference]: Without dead ends: 132 [2018-10-12 20:55:48,240 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 [2018-10-12 20:55:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-12 20:55:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2018-10-12 20:55:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-12 20:55:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2018-10-12 20:55:48,249 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 87 [2018-10-12 20:55:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:48,249 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2018-10-12 20:55:48,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-12 20:55:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2018-10-12 20:55:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-12 20:55:48,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:48,251 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] [2018-10-12 20:55:48,252 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:48,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash -917858694, now seen corresponding path program 2 times [2018-10-12 20:55:48,253 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 79 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-12 20:55:48,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:48,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-12 20:55:48,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-12 20:55:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-12 20:55:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-12 20:55:48,426 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 11 states. [2018-10-12 20:55:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:48,563 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2018-10-12 20:55:48,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-12 20:55:48,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2018-10-12 20:55:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:48,566 INFO L225 Difference]: With dead ends: 179 [2018-10-12 20:55:48,566 INFO L226 Difference]: Without dead ends: 173 [2018-10-12 20:55:48,567 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 [2018-10-12 20:55:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-12 20:55:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2018-10-12 20:55:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-12 20:55:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2018-10-12 20:55:48,577 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 110 [2018-10-12 20:55:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:48,578 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2018-10-12 20:55:48,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-12 20:55:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2018-10-12 20:55:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-12 20:55:48,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:48,580 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] [2018-10-12 20:55:48,580 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:48,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash -319558035, now seen corresponding path program 3 times [2018-10-12 20:55:48,582 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:48,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:48,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-12 20:55:48,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-12 20:55:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-12 20:55:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-10-12 20:55:48,801 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 15 states. [2018-10-12 20:55:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:49,105 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-12 20:55:49,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-12 20:55:49,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2018-10-12 20:55:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:49,112 INFO L225 Difference]: With dead ends: 250 [2018-10-12 20:55:49,112 INFO L226 Difference]: Without dead ends: 221 [2018-10-12 20:55:49,113 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 [2018-10-12 20:55:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-12 20:55:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2018-10-12 20:55:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-12 20:55:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-10-12 20:55:49,123 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 133 [2018-10-12 20:55:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:49,124 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-10-12 20:55:49,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-12 20:55:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-10-12 20:55:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-12 20:55:49,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:49,127 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] [2018-10-12 20:55:49,127 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:49,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2016630042, now seen corresponding path program 4 times [2018-10-12 20:55:49,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 86 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:49,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:49,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 20:55:49,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 20:55:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 20:55:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-12 20:55:49,414 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 17 states. [2018-10-12 20:55:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:49,938 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-12 20:55:49,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-12 20:55:49,939 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 156 [2018-10-12 20:55:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:49,941 INFO L225 Difference]: With dead ends: 321 [2018-10-12 20:55:49,941 INFO L226 Difference]: Without dead ends: 269 [2018-10-12 20:55:49,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2018-10-12 20:55:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-12 20:55:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2018-10-12 20:55:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-12 20:55:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2018-10-12 20:55:49,951 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 156 [2018-10-12 20:55:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:49,952 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2018-10-12 20:55:49,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 20:55:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2018-10-12 20:55:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-12 20:55:49,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:49,955 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] [2018-10-12 20:55:49,955 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:49,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:49,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1576092723, now seen corresponding path program 5 times [2018-10-12 20:55:49,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 75 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:51,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:51,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-12 20:55:51,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-12 20:55:51,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-12 20:55:51,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2018-10-12 20:55:51,482 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand 26 states. [2018-10-12 20:55:52,103 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-12 20:55:52,388 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-10-12 20:55:53,484 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-10-12 20:55:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:54,812 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2018-10-12 20:55:54,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-12 20:55:54,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2018-10-12 20:55:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:54,815 INFO L225 Difference]: With dead ends: 225 [2018-10-12 20:55:54,815 INFO L226 Difference]: Without dead ends: 225 [2018-10-12 20:55:54,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=673, Invalid=2519, Unknown=0, NotChecked=0, Total=3192 [2018-10-12 20:55:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-12 20:55:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2018-10-12 20:55:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-12 20:55:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-12 20:55:54,825 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 179 [2018-10-12 20:55:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:54,825 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-12 20:55:54,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-12 20:55:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-12 20:55:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-12 20:55:54,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:54,829 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] [2018-10-12 20:55:54,830 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:54,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:54,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1567944288, now seen corresponding path program 6 times [2018-10-12 20:55:54,831 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 139 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:55,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:55,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-12 20:55:55,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-12 20:55:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-12 20:55:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-10-12 20:55:55,212 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 21 states. [2018-10-12 20:55:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:55,784 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2018-10-12 20:55:55,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-12 20:55:55,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 202 [2018-10-12 20:55:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:55,787 INFO L225 Difference]: With dead ends: 390 [2018-10-12 20:55:55,787 INFO L226 Difference]: Without dead ends: 315 [2018-10-12 20:55:55,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 20:55:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-12 20:55:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 269. [2018-10-12 20:55:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-12 20:55:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2018-10-12 20:55:55,794 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 202 [2018-10-12 20:55:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:55,795 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2018-10-12 20:55:55,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-12 20:55:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2018-10-12 20:55:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-12 20:55:55,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:55,798 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] [2018-10-12 20:55:55,798 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:55,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1337365459, now seen corresponding path program 7 times [2018-10-12 20:55:55,800 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 97 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:56,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:56,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 20:55:56,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 20:55:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 20:55:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2018-10-12 20:55:56,763 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand 32 states. [2018-10-12 20:56:00,054 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-10-12 20:56:00,448 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:56:00,598 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:56:01,062 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:56:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:01,465 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-12 20:56:01,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-12 20:56:01,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 225 [2018-10-12 20:56:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:01,469 INFO L225 Difference]: With dead ends: 271 [2018-10-12 20:56:01,469 INFO L226 Difference]: Without dead ends: 271 [2018-10-12 20:56:01,471 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 [2018-10-12 20:56:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-12 20:56:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2018-10-12 20:56:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-12 20:56:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2018-10-12 20:56:01,476 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 225 [2018-10-12 20:56:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:01,477 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2018-10-12 20:56:01,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 20:56:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2018-10-12 20:56:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-12 20:56:01,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:01,480 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] [2018-10-12 20:56:01,481 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:01,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2088988570, now seen corresponding path program 8 times [2018-10-12 20:56:01,482 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 215 proven. 661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:02,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:02,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-12 20:56:02,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-12 20:56:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-12 20:56:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-10-12 20:56:02,080 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand 25 states. [2018-10-12 20:56:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:03,078 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-12 20:56:03,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-12 20:56:03,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 248 [2018-10-12 20:56:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:03,080 INFO L225 Difference]: With dead ends: 459 [2018-10-12 20:56:03,080 INFO L226 Difference]: Without dead ends: 361 [2018-10-12 20:56:03,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2018-10-12 20:56:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-12 20:56:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 315. [2018-10-12 20:56:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-12 20:56:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2018-10-12 20:56:03,088 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 248 [2018-10-12 20:56:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:03,088 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2018-10-12 20:56:03,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-12 20:56:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2018-10-12 20:56:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-12 20:56:03,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:03,090 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] [2018-10-12 20:56:03,090 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:03,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 629900237, now seen corresponding path program 9 times [2018-10-12 20:56:03,092 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 240 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:04,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:04,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-12 20:56:04,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-12 20:56:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-12 20:56:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2018-10-12 20:56:04,163 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand 34 states. [2018-10-12 20:56:07,512 WARN L178 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-10-12 20:56:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:09,967 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-10-12 20:56:09,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-12 20:56:09,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 271 [2018-10-12 20:56:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:09,971 INFO L225 Difference]: With dead ends: 317 [2018-10-12 20:56:09,971 INFO L226 Difference]: Without dead ends: 317 [2018-10-12 20:56:09,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1035, Invalid=4817, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 20:56:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-10-12 20:56:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2018-10-12 20:56:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-12 20:56:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2018-10-12 20:56:09,979 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 271 [2018-10-12 20:56:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:09,979 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2018-10-12 20:56:09,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-12 20:56:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2018-10-12 20:56:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-12 20:56:09,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:09,982 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] [2018-10-12 20:56:09,982 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:09,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash -434690464, now seen corresponding path program 10 times [2018-10-12 20:56:09,983 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 314 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:10,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:10,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-12 20:56:10,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-12 20:56:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-12 20:56:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-10-12 20:56:10,748 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 29 states. [2018-10-12 20:56:12,333 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-10-12 20:56:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:12,871 INFO L93 Difference]: Finished difference Result 528 states and 531 transitions. [2018-10-12 20:56:12,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 20:56:12,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 294 [2018-10-12 20:56:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:12,873 INFO L225 Difference]: With dead ends: 528 [2018-10-12 20:56:12,873 INFO L226 Difference]: Without dead ends: 407 [2018-10-12 20:56:12,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=667, Invalid=2873, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 20:56:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-12 20:56:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 361. [2018-10-12 20:56:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-12 20:56:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 364 transitions. [2018-10-12 20:56:12,881 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 364 transitions. Word has length 294 [2018-10-12 20:56:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:12,882 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 364 transitions. [2018-10-12 20:56:12,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-12 20:56:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 364 transitions. [2018-10-12 20:56:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-12 20:56:12,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:12,884 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] [2018-10-12 20:56:12,884 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:12,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -210642605, now seen corresponding path program 11 times [2018-10-12 20:56:12,885 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 262 proven. 1319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:15,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:15,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 20:56:15,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 20:56:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 20:56:15,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 20:56:15,185 INFO L87 Difference]: Start difference. First operand 361 states and 364 transitions. Second operand 40 states. [2018-10-12 20:56:20,138 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:56:20,578 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:20,727 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:56:21,159 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:21,305 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:56:21,586 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-12 20:56:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:22,133 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2018-10-12 20:56:22,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-12 20:56:22,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2018-10-12 20:56:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:22,138 INFO L225 Difference]: With dead ends: 363 [2018-10-12 20:56:22,138 INFO L226 Difference]: Without dead ends: 363 [2018-10-12 20:56:22,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2018-10-12 20:56:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-12 20:56:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2018-10-12 20:56:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-12 20:56:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 363 transitions. [2018-10-12 20:56:22,147 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 363 transitions. Word has length 317 [2018-10-12 20:56:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:22,147 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 363 transitions. [2018-10-12 20:56:22,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 20:56:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 363 transitions. [2018-10-12 20:56:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-12 20:56:22,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:22,150 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] [2018-10-12 20:56:22,150 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:22,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1118960154, now seen corresponding path program 12 times [2018-10-12 20:56:22,151 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 436 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:23,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:23,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-12 20:56:23,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-12 20:56:23,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-12 20:56:23,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2018-10-12 20:56:23,113 INFO L87 Difference]: Start difference. First operand 361 states and 363 transitions. Second operand 33 states. [2018-10-12 20:56:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:24,197 INFO L93 Difference]: Finished difference Result 597 states and 600 transitions. [2018-10-12 20:56:24,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 20:56:24,197 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 340 [2018-10-12 20:56:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:24,200 INFO L225 Difference]: With dead ends: 597 [2018-10-12 20:56:24,200 INFO L226 Difference]: Without dead ends: 453 [2018-10-12 20:56:24,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=3826, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 20:56:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-10-12 20:56:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 407. [2018-10-12 20:56:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-12 20:56:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 410 transitions. [2018-10-12 20:56:24,210 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 410 transitions. Word has length 340 [2018-10-12 20:56:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:24,210 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 410 transitions. [2018-10-12 20:56:24,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-12 20:56:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 410 transitions. [2018-10-12 20:56:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-12 20:56:24,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:24,213 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] [2018-10-12 20:56:24,213 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:24,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1947696077, now seen corresponding path program 13 times [2018-10-12 20:56:24,214 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 379 proven. 1787 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:26,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:26,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 20:56:26,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 20:56:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 20:56:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1744, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 20:56:26,040 INFO L87 Difference]: Start difference. First operand 407 states and 410 transitions. Second operand 44 states. [2018-10-12 20:56:29,360 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-12 20:56:30,948 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-12 20:56:31,342 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-12 20:56:31,537 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-12 20:56:31,836 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-10-12 20:56:32,142 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-12 20:56:32,308 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:56:32,516 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:56:32,850 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:56:33,009 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-12 20:56:33,162 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 20:56:33,355 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-10-12 20:56:33,562 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-12 20:56:33,722 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-12 20:56:34,041 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:56:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:34,495 INFO L93 Difference]: Finished difference Result 409 states and 411 transitions. [2018-10-12 20:56:34,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 20:56:34,496 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 363 [2018-10-12 20:56:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:34,499 INFO L225 Difference]: With dead ends: 409 [2018-10-12 20:56:34,499 INFO L226 Difference]: Without dead ends: 409 [2018-10-12 20:56:34,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1798, Invalid=8914, Unknown=0, NotChecked=0, Total=10712 [2018-10-12 20:56:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-10-12 20:56:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2018-10-12 20:56:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-12 20:56:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2018-10-12 20:56:34,509 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 363 [2018-10-12 20:56:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:34,510 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2018-10-12 20:56:34,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 20:56:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2018-10-12 20:56:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-12 20:56:34,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:34,512 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] [2018-10-12 20:56:34,513 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:34,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash -309055904, now seen corresponding path program 14 times [2018-10-12 20:56:34,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2493 backedges. 581 proven. 1912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:35,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:35,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-12 20:56:35,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-12 20:56:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-12 20:56:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-10-12 20:56:35,426 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand 37 states. [2018-10-12 20:56:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:36,654 INFO L93 Difference]: Finished difference Result 666 states and 669 transitions. [2018-10-12 20:56:36,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-12 20:56:36,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 386 [2018-10-12 20:56:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:36,656 INFO L225 Difference]: With dead ends: 666 [2018-10-12 20:56:36,656 INFO L226 Difference]: Without dead ends: 499 [2018-10-12 20:56:36,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1091, Invalid=4915, Unknown=0, NotChecked=0, Total=6006 [2018-10-12 20:56:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-10-12 20:56:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 453. [2018-10-12 20:56:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-12 20:56:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 456 transitions. [2018-10-12 20:56:36,666 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 456 transitions. Word has length 386 [2018-10-12 20:56:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:36,666 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 456 transitions. [2018-10-12 20:56:36,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-12 20:56:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 456 transitions. [2018-10-12 20:56:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-12 20:56:36,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:36,669 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] [2018-10-12 20:56:36,669 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:36,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 669560531, now seen corresponding path program 15 times [2018-10-12 20:56:36,670 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 519 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:38,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:38,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 20:56:38,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 20:56:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 20:56:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 20:56:38,492 INFO L87 Difference]: Start difference. First operand 453 states and 456 transitions. Second operand 48 states. [2018-10-12 20:56:43,643 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:56:44,232 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:44,377 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:56:44,813 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:44,970 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:56:45,418 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:45,580 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:56:46,034 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:56:46,194 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:56:46,663 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:56:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:47,077 INFO L93 Difference]: Finished difference Result 455 states and 457 transitions. [2018-10-12 20:56:47,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 20:56:47,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 409 [2018-10-12 20:56:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:47,081 INFO L225 Difference]: With dead ends: 455 [2018-10-12 20:56:47,081 INFO L226 Difference]: Without dead ends: 455 [2018-10-12 20:56:47,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2264, Invalid=11076, Unknown=0, NotChecked=0, Total=13340 [2018-10-12 20:56:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-10-12 20:56:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 453. [2018-10-12 20:56:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-12 20:56:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 455 transitions. [2018-10-12 20:56:47,090 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 455 transitions. Word has length 409 [2018-10-12 20:56:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:47,090 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 455 transitions. [2018-10-12 20:56:47,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 20:56:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 455 transitions. [2018-10-12 20:56:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-12 20:56:47,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:47,093 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] [2018-10-12 20:56:47,093 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:47,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1239223142, now seen corresponding path program 16 times [2018-10-12 20:56:47,094 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 749 proven. 2467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:48,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:48,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-12 20:56:48,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-12 20:56:48,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-12 20:56:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2018-10-12 20:56:48,157 INFO L87 Difference]: Start difference. First operand 453 states and 455 transitions. Second operand 41 states. [2018-10-12 20:56:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:49,953 INFO L93 Difference]: Finished difference Result 735 states and 738 transitions. [2018-10-12 20:56:49,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-12 20:56:49,954 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 432 [2018-10-12 20:56:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:49,957 INFO L225 Difference]: With dead ends: 735 [2018-10-12 20:56:49,957 INFO L226 Difference]: Without dead ends: 545 [2018-10-12 20:56:49,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1342, Invalid=6140, Unknown=0, NotChecked=0, Total=7482 [2018-10-12 20:56:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-10-12 20:56:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 499. [2018-10-12 20:56:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-12 20:56:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 502 transitions. [2018-10-12 20:56:49,966 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 502 transitions. Word has length 432 [2018-10-12 20:56:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:49,966 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 502 transitions. [2018-10-12 20:56:49,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-12 20:56:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 502 transitions. [2018-10-12 20:56:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-10-12 20:56:49,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:49,969 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] [2018-10-12 20:56:49,969 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:49,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash -696867891, now seen corresponding path program 17 times [2018-10-12 20:56:49,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:56:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 846 proven. 2766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:56:52,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:56:52,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-12 20:56:52,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-12 20:56:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-12 20:56:52,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2018-10-12 20:56:52,324 INFO L87 Difference]: Start difference. First operand 499 states and 502 transitions. Second operand 50 states. [2018-10-12 20:56:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:59,632 INFO L93 Difference]: Finished difference Result 501 states and 503 transitions. [2018-10-12 20:56:59,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-12 20:56:59,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 455 [2018-10-12 20:56:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:59,635 INFO L225 Difference]: With dead ends: 501 [2018-10-12 20:56:59,635 INFO L226 Difference]: Without dead ends: 501 [2018-10-12 20:56:59,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1927, Invalid=11645, Unknown=0, NotChecked=0, Total=13572 [2018-10-12 20:56:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2018-10-12 20:56:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2018-10-12 20:56:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-12 20:56:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 501 transitions. [2018-10-12 20:56:59,643 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 501 transitions. Word has length 455 [2018-10-12 20:56:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:59,644 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 501 transitions. [2018-10-12 20:56:59,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-12 20:56:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 501 transitions. [2018-10-12 20:56:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-12 20:56:59,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:56:59,647 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] [2018-10-12 20:56:59,647 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:56:59,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:56:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1901590944, now seen corresponding path program 18 times [2018-10-12 20:56:59,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:56:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4031 backedges. 940 proven. 3091 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:00,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:00,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-12 20:57:00,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-12 20:57:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-12 20:57:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 20:57:00,632 INFO L87 Difference]: Start difference. First operand 499 states and 501 transitions. Second operand 45 states. [2018-10-12 20:57:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:02,342 INFO L93 Difference]: Finished difference Result 804 states and 807 transitions. [2018-10-12 20:57:02,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-12 20:57:02,342 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 478 [2018-10-12 20:57:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:02,344 INFO L225 Difference]: With dead ends: 804 [2018-10-12 20:57:02,344 INFO L226 Difference]: Without dead ends: 591 [2018-10-12 20:57:02,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2018-10-12 20:57:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-12 20:57:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 545. [2018-10-12 20:57:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-12 20:57:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 548 transitions. [2018-10-12 20:57:02,352 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 548 transitions. Word has length 478 [2018-10-12 20:57:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:02,353 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 548 transitions. [2018-10-12 20:57:02,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-12 20:57:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 548 transitions. [2018-10-12 20:57:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-10-12 20:57:02,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:02,356 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] [2018-10-12 20:57:02,356 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:02,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -46721965, now seen corresponding path program 19 times [2018-10-12 20:57:02,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4473 backedges. 868 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:04,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:04,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-12 20:57:04,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-12 20:57:04,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-12 20:57:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2018-10-12 20:57:04,954 INFO L87 Difference]: Start difference. First operand 545 states and 548 transitions. Second operand 56 states. [2018-10-12 20:57:12,329 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:57:12,476 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:12,906 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:13,053 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:13,487 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:13,634 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:14,105 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:14,291 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:14,779 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:14,938 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:15,426 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:15,598 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:16,091 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:16,265 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:57:16,760 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:57:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:17,216 INFO L93 Difference]: Finished difference Result 547 states and 549 transitions. [2018-10-12 20:57:17,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-12 20:57:17,218 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 501 [2018-10-12 20:57:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:17,220 INFO L225 Difference]: With dead ends: 547 [2018-10-12 20:57:17,220 INFO L226 Difference]: Without dead ends: 547 [2018-10-12 20:57:17,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3085, Invalid=15821, Unknown=0, NotChecked=0, Total=18906 [2018-10-12 20:57:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2018-10-12 20:57:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2018-10-12 20:57:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-12 20:57:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 547 transitions. [2018-10-12 20:57:17,228 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 547 transitions. Word has length 501 [2018-10-12 20:57:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:17,228 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 547 transitions. [2018-10-12 20:57:17,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-12 20:57:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 547 transitions. [2018-10-12 20:57:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-10-12 20:57:17,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:17,232 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] [2018-10-12 20:57:17,232 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:17,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1731878682, now seen corresponding path program 20 times [2018-10-12 20:57:17,233 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4938 backedges. 1154 proven. 3784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:19,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:19,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-12 20:57:19,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-12 20:57:19,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-12 20:57:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2018-10-12 20:57:19,233 INFO L87 Difference]: Start difference. First operand 545 states and 547 transitions. Second operand 49 states. [2018-10-12 20:57:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:21,321 INFO L93 Difference]: Finished difference Result 873 states and 876 transitions. [2018-10-12 20:57:21,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 20:57:21,321 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 524 [2018-10-12 20:57:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:21,325 INFO L225 Difference]: With dead ends: 873 [2018-10-12 20:57:21,325 INFO L226 Difference]: Without dead ends: 637 [2018-10-12 20:57:21,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1922, Invalid=8998, Unknown=0, NotChecked=0, Total=10920 [2018-10-12 20:57:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2018-10-12 20:57:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 591. [2018-10-12 20:57:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-12 20:57:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 594 transitions. [2018-10-12 20:57:21,333 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 594 transitions. Word has length 524 [2018-10-12 20:57:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:21,333 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 594 transitions. [2018-10-12 20:57:21,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-12 20:57:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 594 transitions. [2018-10-12 20:57:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-10-12 20:57:21,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:21,337 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] [2018-10-12 20:57:21,337 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:21,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1785527245, now seen corresponding path program 21 times [2018-10-12 20:57:21,339 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5426 backedges. 1077 proven. 4349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:24,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:24,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-12 20:57:24,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-12 20:57:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-12 20:57:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3248, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 20:57:24,009 INFO L87 Difference]: Start difference. First operand 591 states and 594 transitions. Second operand 60 states. [2018-10-12 20:57:32,410 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-12 20:57:32,564 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-12 20:57:33,217 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-12 20:57:33,378 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:57:33,845 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:57:34,009 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:57:34,298 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 20:57:34,486 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:57:34,714 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:57:34,882 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:57:35,246 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:57:35,421 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:57:35,911 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:57:36,094 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:57:36,607 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:57:36,790 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-12 20:57:37,305 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-12 20:57:37,478 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-12 20:57:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:38,298 INFO L93 Difference]: Finished difference Result 593 states and 595 transitions. [2018-10-12 20:57:38,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-12 20:57:38,298 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 547 [2018-10-12 20:57:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:38,301 INFO L225 Difference]: With dead ends: 593 [2018-10-12 20:57:38,302 INFO L226 Difference]: Without dead ends: 593 [2018-10-12 20:57:38,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3392, Invalid=18364, Unknown=0, NotChecked=0, Total=21756 [2018-10-12 20:57:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-12 20:57:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2018-10-12 20:57:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-12 20:57:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 593 transitions. [2018-10-12 20:57:38,309 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 593 transitions. Word has length 547 [2018-10-12 20:57:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:38,310 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 593 transitions. [2018-10-12 20:57:38,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-12 20:57:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 593 transitions. [2018-10-12 20:57:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-10-12 20:57:38,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:38,314 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] [2018-10-12 20:57:38,314 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:38,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1863233120, now seen corresponding path program 22 times [2018-10-12 20:57:38,315 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5937 backedges. 1391 proven. 4546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:39,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:39,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-12 20:57:39,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-12 20:57:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-12 20:57:39,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2379, Unknown=0, NotChecked=0, Total=2756 [2018-10-12 20:57:39,758 INFO L87 Difference]: Start difference. First operand 591 states and 593 transitions. Second operand 53 states. [2018-10-12 20:57:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:41,836 INFO L93 Difference]: Finished difference Result 942 states and 945 transitions. [2018-10-12 20:57:41,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-12 20:57:41,837 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 570 [2018-10-12 20:57:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:41,839 INFO L225 Difference]: With dead ends: 942 [2018-10-12 20:57:41,839 INFO L226 Difference]: Without dead ends: 683 [2018-10-12 20:57:41,840 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 [2018-10-12 20:57:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-10-12 20:57:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 637. [2018-10-12 20:57:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-12 20:57:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 640 transitions. [2018-10-12 20:57:41,847 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 640 transitions. Word has length 570 [2018-10-12 20:57:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:41,847 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 640 transitions. [2018-10-12 20:57:41,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-12 20:57:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 640 transitions. [2018-10-12 20:57:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2018-10-12 20:57:41,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:41,852 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] [2018-10-12 20:57:41,852 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:41,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1048119763, now seen corresponding path program 23 times [2018-10-12 20:57:41,853 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:57:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6471 backedges. 1309 proven. 5162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:57:44,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:57:44,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-12 20:57:44,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-12 20:57:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-12 20:57:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3675, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 20:57:44,900 INFO L87 Difference]: Start difference. First operand 637 states and 640 transitions. Second operand 64 states. [2018-10-12 20:57:52,305 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:57:52,447 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:52,875 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:53,022 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:53,462 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:53,621 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:54,078 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:54,234 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:54,704 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:55,426 WARN L178 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:55,908 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:56,085 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:56,575 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:56,754 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:57,260 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:57,442 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:57:57,966 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:57:58,150 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:57:58,679 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:57:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:57:59,162 INFO L93 Difference]: Finished difference Result 639 states and 641 transitions. [2018-10-12 20:57:59,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-12 20:57:59,163 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 593 [2018-10-12 20:57:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:57:59,166 INFO L225 Difference]: With dead ends: 639 [2018-10-12 20:57:59,166 INFO L226 Difference]: Without dead ends: 639 [2018-10-12 20:57:59,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4030, Invalid=21410, Unknown=0, NotChecked=0, Total=25440 [2018-10-12 20:57:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-12 20:57:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2018-10-12 20:57:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-12 20:57:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 639 transitions. [2018-10-12 20:57:59,173 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 639 transitions. Word has length 593 [2018-10-12 20:57:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:57:59,174 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 639 transitions. [2018-10-12 20:57:59,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-12 20:57:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 639 transitions. [2018-10-12 20:57:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2018-10-12 20:57:59,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:57:59,178 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] [2018-10-12 20:57:59,178 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:57:59,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:57:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash -883148390, now seen corresponding path program 24 times [2018-10-12 20:57:59,180 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:57:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:58:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7028 backedges. 1651 proven. 5377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:58:01,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:58:01,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-12 20:58:01,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-12 20:58:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-12 20:58:01,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2759, Unknown=0, NotChecked=0, Total=3192 [2018-10-12 20:58:01,883 INFO L87 Difference]: Start difference. First operand 637 states and 639 transitions. Second operand 57 states. [2018-10-12 20:58:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:58:04,441 INFO L93 Difference]: Finished difference Result 1011 states and 1014 transitions. [2018-10-12 20:58:04,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-12 20:58:04,442 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 616 [2018-10-12 20:58:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:58:04,444 INFO L225 Difference]: With dead ends: 1011 [2018-10-12 20:58:04,444 INFO L226 Difference]: Without dead ends: 729 [2018-10-12 20:58:04,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4301 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2606, Invalid=12400, Unknown=0, NotChecked=0, Total=15006 [2018-10-12 20:58:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2018-10-12 20:58:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 683. [2018-10-12 20:58:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-12 20:58:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 686 transitions. [2018-10-12 20:58:04,453 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 686 transitions. Word has length 616 [2018-10-12 20:58:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:58:04,453 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 686 transitions. [2018-10-12 20:58:04,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-12 20:58:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 686 transitions. [2018-10-12 20:58:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-12 20:58:04,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:58:04,458 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] [2018-10-12 20:58:04,458 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:58:04,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:58:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652749, now seen corresponding path program 25 times [2018-10-12 20:58:04,459 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:58:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:58:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7608 backedges. 1564 proven. 6044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:58:08,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:58:08,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-12 20:58:08,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-12 20:58:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-12 20:58:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4204, Unknown=0, NotChecked=0, Total=4556 [2018-10-12 20:58:08,112 INFO L87 Difference]: Start difference. First operand 683 states and 686 transitions. Second operand 68 states. [2018-10-12 20:58:18,807 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-12 20:58:18,962 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-12 20:58:19,754 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-12 20:58:19,936 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-12 20:58:20,087 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:58:20,273 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-12 20:58:20,700 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-12 20:58:20,965 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 20:58:21,115 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:58:21,267 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 20:58:21,480 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 20:58:21,671 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 20:58:21,824 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:58:21,983 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 20:58:22,204 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 20:58:22,407 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 20:58:22,561 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:58:22,726 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 20:58:22,958 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 20:58:23,165 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-12 20:58:23,484 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-12 20:58:23,732 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-12 20:58:23,932 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-12 20:58:24,328 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-12 20:58:24,529 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-12 20:58:24,905 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-12 20:58:25,087 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-12 20:58:25,456 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-12 20:58:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:58:26,046 INFO L93 Difference]: Finished difference Result 685 states and 687 transitions. [2018-10-12 20:58:26,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-12 20:58:26,048 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 639 [2018-10-12 20:58:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:58:26,050 INFO L225 Difference]: With dead ends: 685 [2018-10-12 20:58:26,050 INFO L226 Difference]: Without dead ends: 685 [2018-10-12 20:58:26,051 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 [2018-10-12 20:58:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-10-12 20:58:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2018-10-12 20:58:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-12 20:58:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 685 transitions. [2018-10-12 20:58:26,057 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 685 transitions. Word has length 639 [2018-10-12 20:58:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:58:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 685 transitions. [2018-10-12 20:58:26,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-12 20:58:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 685 transitions. [2018-10-12 20:58:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-10-12 20:58:26,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:58:26,062 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] [2018-10-12 20:58:26,063 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:58:26,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:58:26,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2139367008, now seen corresponding path program 26 times [2018-10-12 20:58:26,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:58:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:58:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8211 backedges. 1934 proven. 6277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:58:27,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:58:27,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-12 20:58:27,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-12 20:58:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-12 20:58:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2018-10-12 20:58:27,598 INFO L87 Difference]: Start difference. First operand 683 states and 685 transitions. Second operand 61 states. [2018-10-12 20:58:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:58:30,453 INFO L93 Difference]: Finished difference Result 1080 states and 1083 transitions. [2018-10-12 20:58:30,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-12 20:58:30,454 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 662 [2018-10-12 20:58:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:58:30,457 INFO L225 Difference]: With dead ends: 1080 [2018-10-12 20:58:30,457 INFO L226 Difference]: Without dead ends: 775 [2018-10-12 20:58:30,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4996 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2987, Invalid=14305, Unknown=0, NotChecked=0, Total=17292 [2018-10-12 20:58:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-10-12 20:58:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 729. [2018-10-12 20:58:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-12 20:58:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 732 transitions. [2018-10-12 20:58:30,465 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 732 transitions. Word has length 662 [2018-10-12 20:58:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:58:30,466 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 732 transitions. [2018-10-12 20:58:30,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-12 20:58:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 732 transitions. [2018-10-12 20:58:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-10-12 20:58:30,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:58:30,471 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] [2018-10-12 20:58:30,472 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:58:30,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:58:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash 835358547, now seen corresponding path program 27 times [2018-10-12 20:58:30,473 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:58:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:58:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 1842 proven. 6995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:58:35,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:58:35,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-12 20:58:35,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-12 20:58:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-12 20:58:35,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=4647, Unknown=0, NotChecked=0, Total=5112 [2018-10-12 20:58:35,120 INFO L87 Difference]: Start difference. First operand 729 states and 732 transitions. Second operand 72 states. [2018-10-12 20:58:46,327 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:58:46,527 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:46,983 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:47,132 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:47,588 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:47,737 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:48,190 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:48,346 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:48,822 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:48,985 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:49,494 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:49,662 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:50,156 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:50,334 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:50,855 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:51,039 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:51,370 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 20:58:51,663 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:51,885 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:52,427 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:52,623 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:58:53,203 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:58:53,402 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:58:53,956 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:58:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:58:54,489 INFO L93 Difference]: Finished difference Result 731 states and 733 transitions. [2018-10-12 20:58:54,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-12 20:58:54,489 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 685 [2018-10-12 20:58:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:58:54,493 INFO L225 Difference]: With dead ends: 731 [2018-10-12 20:58:54,493 INFO L226 Difference]: Without dead ends: 731 [2018-10-12 20:58:54,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9078 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=5099, Invalid=27843, Unknown=0, NotChecked=0, Total=32942 [2018-10-12 20:58:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2018-10-12 20:58:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2018-10-12 20:58:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-12 20:58:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 731 transitions. [2018-10-12 20:58:54,500 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 731 transitions. Word has length 685 [2018-10-12 20:58:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:58:54,500 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 731 transitions. [2018-10-12 20:58:54,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-12 20:58:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 731 transitions. [2018-10-12 20:58:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-10-12 20:58:54,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:58:54,506 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] [2018-10-12 20:58:54,506 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:58:54,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:58:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2095875098, now seen corresponding path program 28 times [2018-10-12 20:58:54,507 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:58:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:58:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9486 backedges. 2240 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:58:56,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:58:56,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-12 20:58:56,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-12 20:58:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-12 20:58:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 20:58:56,358 INFO L87 Difference]: Start difference. First operand 729 states and 731 transitions. Second operand 65 states. [2018-10-12 20:58:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:58:59,821 INFO L93 Difference]: Finished difference Result 1149 states and 1152 transitions. [2018-10-12 20:58:59,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 20:58:59,821 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 708 [2018-10-12 20:58:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:58:59,825 INFO L225 Difference]: With dead ends: 1149 [2018-10-12 20:58:59,825 INFO L226 Difference]: Without dead ends: 821 [2018-10-12 20:58:59,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5743 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3394, Invalid=16346, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 20:58:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2018-10-12 20:58:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 775. [2018-10-12 20:58:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-12 20:58:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 778 transitions. [2018-10-12 20:58:59,832 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 778 transitions. Word has length 708 [2018-10-12 20:58:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:58:59,832 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 778 transitions. [2018-10-12 20:58:59,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-12 20:58:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 778 transitions. [2018-10-12 20:58:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2018-10-12 20:58:59,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:58:59,837 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] [2018-10-12 20:58:59,838 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:58:59,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:58:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1194277837, now seen corresponding path program 29 times [2018-10-12 20:58:59,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:58:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:59:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10158 backedges. 2143 proven. 8015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:59:05,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:59:05,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-12 20:59:05,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-12 20:59:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-12 20:59:05,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5200, Unknown=0, NotChecked=0, Total=5700 [2018-10-12 20:59:05,425 INFO L87 Difference]: Start difference. First operand 775 states and 778 transitions. Second operand 76 states. [2018-10-12 20:59:06,980 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-10-12 20:59:17,109 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-12 20:59:17,635 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-12 20:59:17,790 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-12 20:59:18,471 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-12 20:59:18,638 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:19,105 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:19,270 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:19,755 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:19,944 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:20,250 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 20:59:20,449 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:20,625 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:21,136 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:21,320 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:21,852 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:22,041 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:22,278 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:59:22,487 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 20:59:22,715 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:22,915 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:23,467 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:23,674 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:24,240 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:24,449 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 20:59:25,029 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 20:59:25,239 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-12 20:59:25,803 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-12 20:59:26,004 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-12 20:59:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:59:26,941 INFO L93 Difference]: Finished difference Result 777 states and 779 transitions. [2018-10-12 20:59:26,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 20:59:26,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 731 [2018-10-12 20:59:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:59:26,945 INFO L225 Difference]: With dead ends: 777 [2018-10-12 20:59:26,945 INFO L226 Difference]: Without dead ends: 777 [2018-10-12 20:59:26,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10188 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=5482, Invalid=31190, Unknown=0, NotChecked=0, Total=36672 [2018-10-12 20:59:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2018-10-12 20:59:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775. [2018-10-12 20:59:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-12 20:59:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 777 transitions. [2018-10-12 20:59:26,953 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 777 transitions. Word has length 731 [2018-10-12 20:59:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:59:26,954 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 777 transitions. [2018-10-12 20:59:26,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-12 20:59:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 777 transitions. [2018-10-12 20:59:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2018-10-12 20:59:26,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:59:26,959 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] [2018-10-12 20:59:26,960 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:59:26,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:59:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1144754592, now seen corresponding path program 30 times [2018-10-12 20:59:26,961 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:59:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:59:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 2569 proven. 8284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:59:29,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:59:29,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-12 20:59:29,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-12 20:59:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-12 20:59:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=4067, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 20:59:29,280 INFO L87 Difference]: Start difference. First operand 775 states and 777 transitions. Second operand 69 states. [2018-10-12 20:59:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:59:32,333 INFO L93 Difference]: Finished difference Result 1218 states and 1221 transitions. [2018-10-12 20:59:32,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-12 20:59:32,333 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 754 [2018-10-12 20:59:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:59:32,336 INFO L225 Difference]: With dead ends: 1218 [2018-10-12 20:59:32,336 INFO L226 Difference]: Without dead ends: 867 [2018-10-12 20:59:32,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6542 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3827, Invalid=18523, Unknown=0, NotChecked=0, Total=22350 [2018-10-12 20:59:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-12 20:59:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 821. [2018-10-12 20:59:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-12 20:59:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 824 transitions. [2018-10-12 20:59:32,344 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 824 transitions. Word has length 754 [2018-10-12 20:59:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:59:32,344 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 824 transitions. [2018-10-12 20:59:32,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-12 20:59:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 824 transitions. [2018-10-12 20:59:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-10-12 20:59:32,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:59:32,350 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] [2018-10-12 20:59:32,350 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:59:32,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:59:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1481090259, now seen corresponding path program 31 times [2018-10-12 20:59:32,352 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:59:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:59:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11571 backedges. 2467 proven. 9104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:59:37,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:59:37,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 20:59:37,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 20:59:37,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 20:59:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5731, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 20:59:37,427 INFO L87 Difference]: Start difference. First operand 821 states and 824 transitions. Second operand 80 states. [2018-10-12 20:59:47,319 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-10-12 20:59:47,572 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 20:59:47,742 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:47,895 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 20:59:48,217 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:48,361 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:48,812 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:49,415 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:49,572 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:50,052 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:50,218 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:50,519 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 20:59:50,709 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:50,876 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:51,388 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:51,564 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:52,081 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:52,261 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:52,811 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:53,055 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:53,603 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:53,819 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:54,375 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:54,572 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:55,147 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:55,347 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:59:55,924 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 20:59:56,131 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 20:59:56,703 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:59:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:59:57,256 INFO L93 Difference]: Finished difference Result 823 states and 825 transitions. [2018-10-12 20:59:57,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 20:59:57,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 777 [2018-10-12 20:59:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:59:57,260 INFO L225 Difference]: With dead ends: 823 [2018-10-12 20:59:57,260 INFO L226 Difference]: Without dead ends: 823 [2018-10-12 20:59:57,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11663 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=6292, Invalid=35120, Unknown=0, NotChecked=0, Total=41412 [2018-10-12 20:59:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-10-12 20:59:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 821. [2018-10-12 20:59:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-12 20:59:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 823 transitions. [2018-10-12 20:59:57,269 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 823 transitions. Word has length 777 [2018-10-12 20:59:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:59:57,270 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 823 transitions. [2018-10-12 20:59:57,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 20:59:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 823 transitions. [2018-10-12 20:59:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2018-10-12 20:59:57,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:59:57,276 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] [2018-10-12 20:59:57,276 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:59:57,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:59:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2068790938, now seen corresponding path program 32 times [2018-10-12 20:59:57,277 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:59:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:00:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12312 backedges. 2921 proven. 9391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:00:00,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:00:00,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-12 21:00:00,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-12 21:00:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-12 21:00:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2018-10-12 21:00:00,062 INFO L87 Difference]: Start difference. First operand 821 states and 823 transitions. Second operand 73 states. [2018-10-12 21:00:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:00:03,704 INFO L93 Difference]: Finished difference Result 1287 states and 1290 transitions. [2018-10-12 21:00:03,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-12 21:00:03,704 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 800 [2018-10-12 21:00:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:00:03,707 INFO L225 Difference]: With dead ends: 1287 [2018-10-12 21:00:03,707 INFO L226 Difference]: Without dead ends: 913 [2018-10-12 21:00:03,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7393 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4286, Invalid=20836, Unknown=0, NotChecked=0, Total=25122 [2018-10-12 21:00:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2018-10-12 21:00:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 867. [2018-10-12 21:00:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-12 21:00:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2018-10-12 21:00:03,715 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 800 [2018-10-12 21:00:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:00:03,716 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2018-10-12 21:00:03,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-12 21:00:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2018-10-12 21:00:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-10-12 21:00:03,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:00:03,721 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] [2018-10-12 21:00:03,721 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:00:03,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:00:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 881009613, now seen corresponding path program 33 times [2018-10-12 21:00:03,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:00:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:00:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13076 backedges. 3162 proven. 9914 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:00:09,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:00:09,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-12 21:00:09,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-12 21:00:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-12 21:00:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=6187, Unknown=0, NotChecked=0, Total=6642 [2018-10-12 21:00:09,316 INFO L87 Difference]: Start difference. First operand 867 states and 870 transitions. Second operand 82 states. [2018-10-12 21:00:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:00:26,317 INFO L93 Difference]: Finished difference Result 869 states and 871 transitions. [2018-10-12 21:00:26,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-12 21:00:26,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 823 [2018-10-12 21:00:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:00:26,322 INFO L225 Difference]: With dead ends: 869 [2018-10-12 21:00:26,322 INFO L226 Difference]: Without dead ends: 869 [2018-10-12 21:00:26,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11688 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4383, Invalid=34229, Unknown=0, NotChecked=0, Total=38612 [2018-10-12 21:00:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2018-10-12 21:00:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2018-10-12 21:00:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-12 21:00:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 869 transitions. [2018-10-12 21:00:26,329 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 869 transitions. Word has length 823 [2018-10-12 21:00:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:00:26,329 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 869 transitions. [2018-10-12 21:00:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-12 21:00:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 869 transitions. [2018-10-12 21:00:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2018-10-12 21:00:26,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:00:26,334 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] [2018-10-12 21:00:26,335 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:00:26,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:00:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -359954848, now seen corresponding path program 34 times [2018-10-12 21:00:26,335 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:00:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:00:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13863 backedges. 3296 proven. 10567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:00:28,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:00:28,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-12 21:00:28,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-12 21:00:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-12 21:00:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 21:00:28,937 INFO L87 Difference]: Start difference. First operand 867 states and 869 transitions. Second operand 77 states. [2018-10-12 21:00:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:00:33,368 INFO L93 Difference]: Finished difference Result 1356 states and 1359 transitions. [2018-10-12 21:00:33,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-12 21:00:33,369 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 846 [2018-10-12 21:00:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:00:33,372 INFO L225 Difference]: With dead ends: 1356 [2018-10-12 21:00:33,372 INFO L226 Difference]: Without dead ends: 959 [2018-10-12 21:00:33,373 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 [2018-10-12 21:00:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-10-12 21:00:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 913. [2018-10-12 21:00:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-12 21:00:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 916 transitions. [2018-10-12 21:00:33,380 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 916 transitions. Word has length 846 [2018-10-12 21:00:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:00:33,380 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 916 transitions. [2018-10-12 21:00:33,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-12 21:00:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 916 transitions. [2018-10-12 21:00:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2018-10-12 21:00:33,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:00:33,386 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] [2018-10-12 21:00:33,386 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:00:33,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:00:33,387 INFO L82 PathProgramCache]: Analyzing trace with hash 772557395, now seen corresponding path program 35 times [2018-10-12 21:00:33,387 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:00:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:00:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14673 backedges. 3184 proven. 11489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:00:39,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:00:39,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-12 21:00:39,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-12 21:00:39,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-12 21:00:39,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=6927, Unknown=0, NotChecked=0, Total=7656 [2018-10-12 21:00:39,263 INFO L87 Difference]: Start difference. First operand 913 states and 916 transitions. Second operand 88 states. [2018-10-12 21:00:50,286 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 21:00:50,429 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:50,875 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:51,026 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:51,471 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:51,625 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:52,095 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:52,253 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:52,730 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:52,896 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:53,397 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:53,567 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:54,069 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:54,259 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:54,476 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 21:00:54,916 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:55,095 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:55,636 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:55,826 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:56,373 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:56,568 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:57,127 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:57,331 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:57,911 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:58,112 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:58,708 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:58,927 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:00:59,593 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:00:59,840 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:01:00,457 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:01:00,682 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 21:01:01,288 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 21:01:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:01:01,884 INFO L93 Difference]: Finished difference Result 915 states and 917 transitions. [2018-10-12 21:01:01,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-12 21:01:01,885 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 869 [2018-10-12 21:01:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:01:01,889 INFO L225 Difference]: With dead ends: 915 [2018-10-12 21:01:01,889 INFO L226 Difference]: Without dead ends: 915 [2018-10-12 21:01:01,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14572 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=7609, Invalid=43241, Unknown=0, NotChecked=0, Total=50850 [2018-10-12 21:01:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-10-12 21:01:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 913. [2018-10-12 21:01:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-12 21:01:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 915 transitions. [2018-10-12 21:01:01,897 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 915 transitions. Word has length 869 [2018-10-12 21:01:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:01:01,898 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 915 transitions. [2018-10-12 21:01:01,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-12 21:01:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 915 transitions. [2018-10-12 21:01:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-12 21:01:01,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:01:01,904 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] [2018-10-12 21:01:01,904 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:01:01,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:01:01,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1793616154, now seen corresponding path program 36 times [2018-10-12 21:01:01,905 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:01:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:01:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15506 backedges. 3694 proven. 11812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:01:04,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:01:04,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-12 21:01:04,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-12 21:01:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-12 21:01:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=5627, Unknown=0, NotChecked=0, Total=6480 [2018-10-12 21:01:04,544 INFO L87 Difference]: Start difference. First operand 913 states and 915 transitions. Second operand 81 states. [2018-10-12 21:01:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:01:09,534 INFO L93 Difference]: Finished difference Result 1425 states and 1428 transitions. [2018-10-12 21:01:09,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 21:01:09,534 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 892 [2018-10-12 21:01:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:01:09,537 INFO L225 Difference]: With dead ends: 1425 [2018-10-12 21:01:09,538 INFO L226 Difference]: Without dead ends: 1005 [2018-10-12 21:01:09,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9251 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5282, Invalid=25870, Unknown=0, NotChecked=0, Total=31152 [2018-10-12 21:01:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2018-10-12 21:01:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 959. [2018-10-12 21:01:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-12 21:01:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 962 transitions. [2018-10-12 21:01:09,547 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 962 transitions. Word has length 892 [2018-10-12 21:01:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:01:09,548 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 962 transitions. [2018-10-12 21:01:09,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-12 21:01:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 962 transitions. [2018-10-12 21:01:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-12 21:01:09,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:01:09,553 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] [2018-10-12 21:01:09,553 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:01:09,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:01:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 478034893, now seen corresponding path program 37 times [2018-10-12 21:01:09,554 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:01:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:01:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16362 backedges. 3577 proven. 12785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:01:15,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:01:15,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-10-12 21:01:15,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-12 21:01:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-12 21:01:15,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=7600, Unknown=0, NotChecked=0, Total=8372 [2018-10-12 21:01:15,725 INFO L87 Difference]: Start difference. First operand 959 states and 962 transitions. Second operand 92 states. [2018-10-12 21:01:32,633 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-12 21:01:32,781 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-12 21:01:33,154 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-10-12 21:01:33,568 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-12 21:01:33,732 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:34,033 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 21:01:34,224 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:34,393 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:34,902 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:35,080 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:35,259 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 21:01:35,454 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 21:01:35,674 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:35,860 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:36,177 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-12 21:01:36,399 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:36,591 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:37,121 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:37,319 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:37,864 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:38,061 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:38,616 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:38,820 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:39,390 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:39,593 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:40,179 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:40,436 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:40,676 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 21:01:41,103 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:41,323 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:41,941 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:42,189 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:42,814 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:43,047 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-12 21:01:43,698 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-12 21:01:43,937 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-12 21:01:44,567 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-12 21:01:44,788 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-12 21:01:45,239 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 21:01:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:01:46,048 INFO L93 Difference]: Finished difference Result 961 states and 963 transitions. [2018-10-12 21:01:46,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-12 21:01:46,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 915 [2018-10-12 21:01:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:01:46,052 INFO L225 Difference]: With dead ends: 961 [2018-10-12 21:01:46,052 INFO L226 Difference]: Without dead ends: 961 [2018-10-12 21:01:46,054 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 [2018-10-12 21:01:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2018-10-12 21:01:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2018-10-12 21:01:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-12 21:01:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 961 transitions. [2018-10-12 21:01:46,060 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 961 transitions. Word has length 915 [2018-10-12 21:01:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:01:46,061 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 961 transitions. [2018-10-12 21:01:46,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-12 21:01:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 961 transitions. [2018-10-12 21:01:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2018-10-12 21:01:46,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:01:46,067 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] [2018-10-12 21:01:46,067 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:01:46,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:01:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1570074208, now seen corresponding path program 38 times [2018-10-12 21:01:46,068 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:01:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:01:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17241 backedges. 4115 proven. 13126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:01:48,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:01:48,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-12 21:01:48,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-12 21:01:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-12 21:01:48,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=6203, Unknown=0, NotChecked=0, Total=7140 [2018-10-12 21:01:48,813 INFO L87 Difference]: Start difference. First operand 959 states and 961 transitions. Second operand 85 states. [2018-10-12 21:01:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:01:54,241 INFO L93 Difference]: Finished difference Result 1494 states and 1497 transitions. [2018-10-12 21:01:54,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-12 21:01:54,241 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 938 [2018-10-12 21:01:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:01:54,246 INFO L225 Difference]: With dead ends: 1494 [2018-10-12 21:01:54,246 INFO L226 Difference]: Without dead ends: 1051 [2018-10-12 21:01:54,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10258 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5819, Invalid=28591, Unknown=0, NotChecked=0, Total=34410 [2018-10-12 21:01:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2018-10-12 21:01:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1005. [2018-10-12 21:01:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-12 21:01:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1008 transitions. [2018-10-12 21:01:54,256 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1008 transitions. Word has length 938 [2018-10-12 21:01:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:01:54,257 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1008 transitions. [2018-10-12 21:01:54,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-12 21:01:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1008 transitions. [2018-10-12 21:01:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2018-10-12 21:01:54,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:01:54,263 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] [2018-10-12 21:01:54,263 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:01:54,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:01:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash -365658157, now seen corresponding path program 39 times [2018-10-12 21:01:54,264 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:01:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:02:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18143 backedges. 3993 proven. 14150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:02:01,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:02:01,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-10-12 21:02:01,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-12 21:02:01,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-12 21:02:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=8235, Unknown=0, NotChecked=0, Total=9120 [2018-10-12 21:02:01,123 INFO L87 Difference]: Start difference. First operand 1005 states and 1008 transitions. Second operand 96 states. [2018-10-12 21:02:19,039 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-10-12 21:02:19,813 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 21:02:19,971 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:20,272 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:02:20,458 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:20,619 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:20,946 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:02:21,141 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:21,330 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:21,499 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 21:02:21,834 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:21,997 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:22,160 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 21:02:22,509 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:22,675 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:23,181 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:23,352 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:23,865 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:24,041 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:24,569 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:24,759 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:25,293 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:25,478 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:26,034 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:26,229 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:26,422 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 21:02:26,642 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:02:26,883 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:27,082 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:27,662 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:27,866 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:28,451 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:28,665 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:29,284 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:29,503 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:30,119 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:30,340 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:30,975 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:31,207 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:02:31,626 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:02:31,917 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:02:32,150 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-12 21:02:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:02:33,439 INFO L93 Difference]: Finished difference Result 1007 states and 1009 transitions. [2018-10-12 21:02:33,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-12 21:02:33,439 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 961 [2018-10-12 21:02:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:02:33,444 INFO L225 Difference]: With dead ends: 1007 [2018-10-12 21:02:33,444 INFO L226 Difference]: Without dead ends: 1007 [2018-10-12 21:02:33,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=9050, Invalid=52206, Unknown=0, NotChecked=0, Total=61256 [2018-10-12 21:02:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-10-12 21:02:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1005. [2018-10-12 21:02:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-12 21:02:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1007 transitions. [2018-10-12 21:02:33,453 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1007 transitions. Word has length 961 [2018-10-12 21:02:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:02:33,453 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1007 transitions. [2018-10-12 21:02:33,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-12 21:02:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1007 transitions. [2018-10-12 21:02:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2018-10-12 21:02:33,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:02:33,459 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] [2018-10-12 21:02:33,459 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:02:33,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:02:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash -719584358, now seen corresponding path program 40 times [2018-10-12 21:02:33,461 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:02:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:02:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19068 backedges. 4559 proven. 14509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:02:36,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:02:36,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-12 21:02:36,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-12 21:02:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-12 21:02:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=6807, Unknown=0, NotChecked=0, Total=7832 [2018-10-12 21:02:36,469 INFO L87 Difference]: Start difference. First operand 1005 states and 1007 transitions. Second operand 89 states. [2018-10-12 21:02:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:02:41,791 INFO L93 Difference]: Finished difference Result 1563 states and 1566 transitions. [2018-10-12 21:02:41,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-12 21:02:41,791 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 984 [2018-10-12 21:02:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:02:41,795 INFO L225 Difference]: With dead ends: 1563 [2018-10-12 21:02:41,795 INFO L226 Difference]: Without dead ends: 1097 [2018-10-12 21:02:41,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11317 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6382, Invalid=31448, Unknown=0, NotChecked=0, Total=37830 [2018-10-12 21:02:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-10-12 21:02:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1051. [2018-10-12 21:02:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-12 21:02:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1054 transitions. [2018-10-12 21:02:41,805 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1054 transitions. Word has length 984 [2018-10-12 21:02:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:02:41,805 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1054 transitions. [2018-10-12 21:02:41,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-12 21:02:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1054 transitions. [2018-10-12 21:02:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2018-10-12 21:02:41,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:02:41,812 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] [2018-10-12 21:02:41,812 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:02:41,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:02:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 98862029, now seen corresponding path program 41 times [2018-10-12 21:02:41,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:02:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:02:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20016 backedges. 4432 proven. 15584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:02:49,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:02:49,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-10-12 21:02:49,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-12 21:02:49,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-12 21:02:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=9036, Unknown=0, NotChecked=0, Total=9900 [2018-10-12 21:02:49,438 INFO L87 Difference]: Start difference. First operand 1051 states and 1054 transitions. Second operand 100 states. [2018-10-12 21:03:10,194 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-12 21:03:10,353 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-12 21:03:11,260 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-12 21:03:11,445 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-12 21:03:11,618 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 21:03:11,828 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-12 21:03:12,302 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-12 21:03:12,529 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:12,779 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:12,968 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:13,186 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:13,384 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:13,545 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:13,718 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:13,944 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:14,147 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:14,317 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:14,491 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:14,721 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:14,938 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:15,115 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:15,291 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:15,532 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:15,759 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:15,943 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:16,130 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:16,379 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:16,630 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:16,813 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:16,997 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:17,249 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:17,495 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:17,726 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:17,993 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:18,266 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:18,504 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:18,702 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:18,898 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:19,178 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:19,432 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:19,625 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:19,821 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:20,098 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:20,358 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:20,571 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:20,771 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:21,057 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:21,321 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-12 21:03:21,525 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 21:03:21,731 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-12 21:03:22,026 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-12 21:03:22,287 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-12 21:03:22,506 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 21:03:22,720 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-12 21:03:23,110 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-12 21:03:23,371 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-12 21:03:23,872 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-12 21:03:24,118 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-12 21:03:24,686 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-12 21:03:24,912 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-12 21:03:25,367 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-12 21:03:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:03:26,031 INFO L93 Difference]: Finished difference Result 1053 states and 1055 transitions. [2018-10-12 21:03:26,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-12 21:03:26,032 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1007 [2018-10-12 21:03:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:03:26,037 INFO L225 Difference]: With dead ends: 1053 [2018-10-12 21:03:26,037 INFO L226 Difference]: Without dead ends: 1053 [2018-10-12 21:03:26,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18943 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=9025, Invalid=56255, Unknown=0, NotChecked=0, Total=65280 [2018-10-12 21:03:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2018-10-12 21:03:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1051. [2018-10-12 21:03:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-12 21:03:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1053 transitions. [2018-10-12 21:03:26,046 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1053 transitions. Word has length 1007 [2018-10-12 21:03:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:03:26,046 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1053 transitions. [2018-10-12 21:03:26,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-12 21:03:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1053 transitions. [2018-10-12 21:03:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-10-12 21:03:26,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:03:26,053 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] [2018-10-12 21:03:26,053 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:03:26,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:03:26,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1315035552, now seen corresponding path program 42 times [2018-10-12 21:03:26,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:03:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:03:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20987 backedges. 5026 proven. 15961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:03:29,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:03:29,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-12 21:03:29,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-12 21:03:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-12 21:03:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=7439, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 21:03:29,700 INFO L87 Difference]: Start difference. First operand 1051 states and 1053 transitions. Second operand 93 states. [2018-10-12 21:03:32,906 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-12 21:03:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 21:03:36,435 INFO L93 Difference]: Finished difference Result 1632 states and 1635 transitions. [2018-10-12 21:03:36,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-12 21:03:36,435 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1030 [2018-10-12 21:03:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 21:03:36,439 INFO L225 Difference]: With dead ends: 1632 [2018-10-12 21:03:36,439 INFO L226 Difference]: Without dead ends: 1143 [2018-10-12 21:03:36,441 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 [2018-10-12 21:03:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-10-12 21:03:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1097. [2018-10-12 21:03:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-10-12 21:03:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1100 transitions. [2018-10-12 21:03:36,452 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1100 transitions. Word has length 1030 [2018-10-12 21:03:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 21:03:36,452 INFO L481 AbstractCegarLoop]: Abstraction has 1097 states and 1100 transitions. [2018-10-12 21:03:36,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-12 21:03:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1100 transitions. [2018-10-12 21:03:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2018-10-12 21:03:36,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 21:03:36,461 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] [2018-10-12 21:03:36,461 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 21:03:36,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 21:03:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1054623059, now seen corresponding path program 43 times [2018-10-12 21:03:36,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 21:03:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 21:03:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21981 backedges. 4894 proven. 17087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 21:03:44,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 21:03:44,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-10-12 21:03:44,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-12 21:03:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-12 21:03:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=9655, Unknown=0, NotChecked=0, Total=10712 [2018-10-12 21:03:44,704 INFO L87 Difference]: Start difference. First operand 1097 states and 1100 transitions. Second operand 104 states. [2018-10-12 21:04:06,232 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-12 21:04:06,867 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:07,064 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:07,586 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:07,754 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:08,280 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:08,453 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:08,799 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:04:09,051 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:09,248 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:09,816 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:10,006 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:10,575 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:10,753 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:11,284 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:11,467 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:12,008 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:12,190 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:12,750 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:12,942 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:13,516 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:13,716 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:13,917 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 21:04:14,134 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-12 21:04:14,380 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:14,584 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:15,232 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:15,443 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:16,059 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:16,277 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:16,900 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:17,127 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:17,762 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:17,990 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:18,658 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-12 21:04:18,887 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 21:04:19,127 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55