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/dll_extends_pointer_true-valid-memsafety.i_27.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:33:22,661 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:33:22,663 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:33:22,675 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:33:22,675 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:33:22,676 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:33:22,679 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:33:22,690 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:33:22,692 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:33:22,693 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:33:22,694 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 15:33:22,694 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 15:33:22,695 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 15:33:22,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 15:33:22,697 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 15:33:22,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 15:33:22,699 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 15:33:22,701 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 15:33:22,706 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 15:33:22,711 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 15:33:22,712 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 15:33:22,713 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 15:33:22,716 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-10 15:33:22,724 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-10 15:33:22,733 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:33:22,733 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:33:22,734 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:33:22,734 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:33:22,734 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:33:22,734 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:33:22,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:33:22,735 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:33:22,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:33:22,736 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:33:22,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:33:22,736 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:33:22,736 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:33:22,737 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:33:22,737 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:33:22,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:33:22,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:33:22,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:33:22,799 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:33:22,799 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:33:22,800 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/dll_extends_pointer_true-valid-memsafety.i_27.bpl [2018-10-10 15:33:22,800 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/dll_extends_pointer_true-valid-memsafety.i_27.bpl' [2018-10-10 15:33:22,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:33:22,880 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:33:22,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:33:22,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:33:22,881 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:33:22,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/1) ... [2018-10-10 15:33:22,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:33:22,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:33:22,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:33:22,965 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:33:22,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (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 [2018-10-10 15:33:23,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:33:23,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:33:23,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:33:23,885 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:33:23,887 INFO L202 PluginConnector]: Adding new model dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:33:23 BoogieIcfgContainer [2018-10-10 15:33:23,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:33:23,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:33:23,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:33:23,893 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:33:23,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:33:22" (1/2) ... [2018-10-10 15:33:23,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb59fb4 and model type dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:33:23, skipping insertion in model container [2018-10-10 15:33:23,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dll_extends_pointer_true-valid-memsafety.i_27.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:33:23" (2/2) ... [2018-10-10 15:33:23,897 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer_true-valid-memsafety.i_27.bpl [2018-10-10 15:33:23,908 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:33:23,920 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:33:23,939 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:33:23,972 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:33:23,973 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:33:23,973 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:33:23,973 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:33:23,974 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:33:23,974 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:33:23,974 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:33:23,974 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:33:23,974 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:33:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2018-10-10 15:33:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-10 15:33:24,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:24,024 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:24,026 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:24,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -253934023, now seen corresponding path program 1 times [2018-10-10 15:33:24,098 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:24,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:33:24,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-10 15:33:24,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-10 15:33:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-10 15:33:24,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-10 15:33:24,449 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 6 states. [2018-10-10 15:33:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:24,917 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2018-10-10 15:33:24,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-10 15:33:24,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2018-10-10 15:33:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:24,933 INFO L225 Difference]: With dead ends: 195 [2018-10-10 15:33:24,934 INFO L226 Difference]: Without dead ends: 195 [2018-10-10 15:33:24,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-10 15:33:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-10 15:33:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2018-10-10 15:33:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-10 15:33:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-10 15:33:24,986 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 50 [2018-10-10 15:33:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:24,986 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-10 15:33:24,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-10 15:33:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-10 15:33:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-10 15:33:24,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:24,990 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:24,994 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:24,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash -667477305, now seen corresponding path program 1 times [2018-10-10 15:33:24,996 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:25,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:25,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-10 15:33:25,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-10 15:33:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-10 15:33:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-10 15:33:25,843 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 11 states. [2018-10-10 15:33:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:27,406 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2018-10-10 15:33:27,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-10 15:33:27,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2018-10-10 15:33:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:27,411 INFO L225 Difference]: With dead ends: 215 [2018-10-10 15:33:27,411 INFO L226 Difference]: Without dead ends: 213 [2018-10-10 15:33:27,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2018-10-10 15:33:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-10 15:33:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 150. [2018-10-10 15:33:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-10 15:33:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-10 15:33:27,428 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 78 [2018-10-10 15:33:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:27,428 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-10 15:33:27,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-10 15:33:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-10 15:33:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-10 15:33:27,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:27,433 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:27,433 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:27,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1841561150, now seen corresponding path program 1 times [2018-10-10 15:33:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:27,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:33:27,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-10 15:33:27,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-10 15:33:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-10 15:33:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-10 15:33:27,602 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 6 states. [2018-10-10 15:33:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:27,805 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2018-10-10 15:33:27,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-10 15:33:27,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2018-10-10 15:33:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:27,810 INFO L225 Difference]: With dead ends: 256 [2018-10-10 15:33:27,810 INFO L226 Difference]: Without dead ends: 256 [2018-10-10 15:33:27,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-10 15:33:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-10 15:33:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 150. [2018-10-10 15:33:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-10 15:33:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-10 15:33:27,823 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 92 [2018-10-10 15:33:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:27,824 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-10 15:33:27,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-10 15:33:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-10 15:33:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-10 15:33:27,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:27,827 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:27,827 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:27,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1013207467, now seen corresponding path program 2 times [2018-10-10 15:33:27,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:28,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:28,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-10 15:33:28,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 15:33:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 15:33:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 15:33:28,340 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 14 states. [2018-10-10 15:33:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:29,525 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2018-10-10 15:33:29,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-10 15:33:29,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2018-10-10 15:33:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:29,529 INFO L225 Difference]: With dead ends: 171 [2018-10-10 15:33:29,529 INFO L226 Difference]: Without dead ends: 141 [2018-10-10 15:33:29,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2018-10-10 15:33:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-10 15:33:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2018-10-10 15:33:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-10 15:33:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-10 15:33:29,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 106 [2018-10-10 15:33:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:29,540 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-10 15:33:29,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 15:33:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-10 15:33:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-10 15:33:29,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:29,542 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:29,543 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:29,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash -622245556, now seen corresponding path program 1 times [2018-10-10 15:33:29,544 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:32,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:32,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-10 15:33:32,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-10 15:33:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-10 15:33:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2018-10-10 15:33:32,322 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 27 states. [2018-10-10 15:33:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:36,332 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-10 15:33:36,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-10 15:33:36,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 120 [2018-10-10 15:33:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:36,335 INFO L225 Difference]: With dead ends: 248 [2018-10-10 15:33:36,335 INFO L226 Difference]: Without dead ends: 248 [2018-10-10 15:33:36,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=490, Invalid=3050, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:33:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-10 15:33:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2018-10-10 15:33:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-10 15:33:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-10 15:33:36,350 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 120 [2018-10-10 15:33:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:36,355 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-10 15:33:36,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-10 15:33:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-10 15:33:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-10 15:33:36,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:36,359 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:36,359 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:36,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:36,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2027852634, now seen corresponding path program 2 times [2018-10-10 15:33:36,365 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:37,031 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2018-10-10 15:33:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:38,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:38,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-10 15:33:38,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-10 15:33:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-10 15:33:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2018-10-10 15:33:38,691 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 35 states. [2018-10-10 15:33:40,563 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-10-10 15:33:40,823 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2018-10-10 15:33:41,507 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2018-10-10 15:33:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:44,316 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-10 15:33:44,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 15:33:44,318 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 148 [2018-10-10 15:33:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:44,319 INFO L225 Difference]: With dead ends: 254 [2018-10-10 15:33:44,320 INFO L226 Difference]: Without dead ends: 252 [2018-10-10 15:33:44,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=460, Invalid=4942, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 15:33:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-10 15:33:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2018-10-10 15:33:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 15:33:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-10 15:33:44,343 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 148 [2018-10-10 15:33:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:44,344 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-10 15:33:44,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-10 15:33:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-10 15:33:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-10 15:33:44,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:44,352 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:44,352 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:44,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1006666129, now seen corresponding path program 3 times [2018-10-10 15:33:44,356 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:45,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:45,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-10 15:33:45,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-10 15:33:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-10 15:33:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2018-10-10 15:33:45,374 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 27 states. [2018-10-10 15:33:48,719 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-10-10 15:33:50,201 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-10-10 15:33:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:50,555 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-10 15:33:50,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-10 15:33:50,555 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 162 [2018-10-10 15:33:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:50,558 INFO L225 Difference]: With dead ends: 278 [2018-10-10 15:33:50,559 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 15:33:50,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=828, Invalid=3728, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:33:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 15:33:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 220. [2018-10-10 15:33:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 15:33:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-10 15:33:50,567 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 162 [2018-10-10 15:33:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:50,568 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-10 15:33:50,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-10 15:33:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-10 15:33:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-10 15:33:50,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:50,570 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:50,570 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:50,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1614848920, now seen corresponding path program 4 times [2018-10-10 15:33:50,572 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 57 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:52,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:52,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-10 15:33:52,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-10 15:33:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-10 15:33:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2018-10-10 15:33:52,174 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 34 states. [2018-10-10 15:33:54,187 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2018-10-10 15:33:54,741 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:33:54,903 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2018-10-10 15:33:55,222 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2018-10-10 15:33:56,711 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2018-10-10 15:33:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:58,322 INFO L93 Difference]: Finished difference Result 268 states and 269 transitions. [2018-10-10 15:33:58,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 15:33:58,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 176 [2018-10-10 15:33:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:58,324 INFO L225 Difference]: With dead ends: 268 [2018-10-10 15:33:58,324 INFO L226 Difference]: Without dead ends: 210 [2018-10-10 15:33:58,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=639, Invalid=6501, Unknown=0, NotChecked=0, Total=7140 [2018-10-10 15:33:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-10 15:33:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 191. [2018-10-10 15:33:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-10 15:33:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-10 15:33:58,332 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 176 [2018-10-10 15:33:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:58,332 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-10 15:33:58,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-10 15:33:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-10 15:33:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-10 15:33:58,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:58,335 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:58,335 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:58,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2113561119, now seen corresponding path program 5 times [2018-10-10 15:33:58,336 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:00,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:00,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:34:00,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:34:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:34:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:34:00,465 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 46 states. [2018-10-10 15:34:03,875 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-10 15:34:08,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:08,818 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-10-10 15:34:08,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-10 15:34:08,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 190 [2018-10-10 15:34:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:08,822 INFO L225 Difference]: With dead ends: 320 [2018-10-10 15:34:08,822 INFO L226 Difference]: Without dead ends: 320 [2018-10-10 15:34:08,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=820, Invalid=10100, Unknown=0, NotChecked=0, Total=10920 [2018-10-10 15:34:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-10-10 15:34:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 262. [2018-10-10 15:34:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-10 15:34:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2018-10-10 15:34:08,831 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 190 [2018-10-10 15:34:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:08,832 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2018-10-10 15:34:08,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:34:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2018-10-10 15:34:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-10 15:34:08,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:08,835 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:34:08,835 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:08,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1387594157, now seen corresponding path program 6 times [2018-10-10 15:34:08,836 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:16,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:16,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:34:16,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:34:16,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:34:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3399, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:34:16,351 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand 60 states. [2018-10-10 15:34:21,198 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2018-10-10 15:34:21,648 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2018-10-10 15:34:23,269 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:34:23,667 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2018-10-10 15:34:24,394 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:34:24,648 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2018-10-10 15:34:24,933 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2018-10-10 15:34:25,570 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2018-10-10 15:34:25,980 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2018-10-10 15:34:26,668 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2018-10-10 15:34:28,166 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2018-10-10 15:34:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:33,109 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2018-10-10 15:34:33,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-10 15:34:33,109 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 218 [2018-10-10 15:34:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:33,112 INFO L225 Difference]: With dead ends: 352 [2018-10-10 15:34:33,112 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 15:34:33,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=790, Invalid=15980, Unknown=0, NotChecked=0, Total=16770 [2018-10-10 15:34:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 15:34:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 290. [2018-10-10 15:34:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-10 15:34:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 292 transitions. [2018-10-10 15:34:33,124 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 292 transitions. Word has length 218 [2018-10-10 15:34:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:33,124 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 292 transitions. [2018-10-10 15:34:33,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:34:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 292 transitions. [2018-10-10 15:34:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-10 15:34:33,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:33,127 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:34:33,127 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:33,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 63892132, now seen corresponding path program 7 times [2018-10-10 15:34:33,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:35,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:35,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:34:35,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:34:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:34:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:34:35,544 INFO L87 Difference]: Start difference. First operand 290 states and 292 transitions. Second operand 46 states. [2018-10-10 15:34:37,988 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-10-10 15:34:40,726 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2018-10-10 15:34:41,060 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2018-10-10 15:34:41,316 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2018-10-10 15:34:41,559 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2018-10-10 15:34:41,802 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2018-10-10 15:34:42,173 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2018-10-10 15:34:42,446 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2018-10-10 15:34:42,658 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2018-10-10 15:34:42,892 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2018-10-10 15:34:43,139 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2018-10-10 15:34:43,339 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2018-10-10 15:34:43,556 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2018-10-10 15:34:43,904 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2018-10-10 15:34:44,553 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2018-10-10 15:34:45,165 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2018-10-10 15:34:45,947 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2018-10-10 15:34:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:46,685 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2018-10-10 15:34:46,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-10 15:34:46,687 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 232 [2018-10-10 15:34:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:46,688 INFO L225 Difference]: With dead ends: 376 [2018-10-10 15:34:46,689 INFO L226 Difference]: Without dead ends: 376 [2018-10-10 15:34:46,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1987, Invalid=12775, Unknown=0, NotChecked=0, Total=14762 [2018-10-10 15:34:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-10-10 15:34:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 290. [2018-10-10 15:34:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-10 15:34:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 292 transitions. [2018-10-10 15:34:46,696 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 292 transitions. Word has length 232 [2018-10-10 15:34:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:46,697 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 292 transitions. [2018-10-10 15:34:46,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:34:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 292 transitions. [2018-10-10 15:34:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-10 15:34:46,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:46,698 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:34:46,699 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:46,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1247027141, now seen corresponding path program 8 times [2018-10-10 15:34:46,700 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:47,447 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-10-10 15:34:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 85 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:50,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:50,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-10 15:34:50,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-10 15:34:50,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-10 15:34:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2819, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 15:34:50,508 INFO L87 Difference]: Start difference. First operand 290 states and 292 transitions. Second operand 55 states. [2018-10-10 15:34:53,771 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2018-10-10 15:34:54,601 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:34:54,841 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2018-10-10 15:34:55,355 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-10 15:34:55,762 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2018-10-10 15:34:56,358 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2018-10-10 15:34:56,597 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2018-10-10 15:34:56,785 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2018-10-10 15:34:57,500 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-10-10 15:34:57,732 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-10-10 15:34:58,015 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2018-10-10 15:34:58,336 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2018-10-10 15:34:58,933 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2018-10-10 15:34:59,208 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2018-10-10 15:34:59,520 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2018-10-10 15:34:59,885 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-10 15:35:00,168 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2018-10-10 15:35:00,552 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2018-10-10 15:35:01,159 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2018-10-10 15:35:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:05,035 INFO L93 Difference]: Finished difference Result 366 states and 367 transitions. [2018-10-10 15:35:05,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-10 15:35:05,036 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 246 [2018-10-10 15:35:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:05,037 INFO L225 Difference]: With dead ends: 366 [2018-10-10 15:35:05,037 INFO L226 Difference]: Without dead ends: 280 [2018-10-10 15:35:05,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4284 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=972, Invalid=16058, Unknown=0, NotChecked=0, Total=17030 [2018-10-10 15:35:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-10 15:35:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 261. [2018-10-10 15:35:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-10 15:35:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-10-10 15:35:05,044 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 246 [2018-10-10 15:35:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:05,044 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-10-10 15:35:05,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-10 15:35:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-10-10 15:35:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-10 15:35:05,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:05,046 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:35:05,046 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:05,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:05,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2054111410, now seen corresponding path program 9 times [2018-10-10 15:35:05,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:35:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:35:09,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:35:09,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 15:35:09,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 15:35:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 15:35:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4118, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 15:35:09,396 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 66 states. [2018-10-10 15:35:12,913 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-10-10 15:35:17,818 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2018-10-10 15:35:18,034 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2018-10-10 15:35:19,129 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2018-10-10 15:35:19,414 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2018-10-10 15:35:19,942 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2018-10-10 15:35:20,168 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2018-10-10 15:35:20,429 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2018-10-10 15:35:20,984 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2018-10-10 15:35:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:26,159 INFO L93 Difference]: Finished difference Result 418 states and 420 transitions. [2018-10-10 15:35:26,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-10 15:35:26,160 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 260 [2018-10-10 15:35:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:26,163 INFO L225 Difference]: With dead ends: 418 [2018-10-10 15:35:26,163 INFO L226 Difference]: Without dead ends: 418 [2018-10-10 15:35:26,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1131, Invalid=21519, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 15:35:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-10-10 15:35:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 332. [2018-10-10 15:35:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-10-10 15:35:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 334 transitions. [2018-10-10 15:35:26,172 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 334 transitions. Word has length 260 [2018-10-10 15:35:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:26,172 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 334 transitions. [2018-10-10 15:35:26,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 15:35:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 334 transitions. [2018-10-10 15:35:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-10 15:35:26,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:26,174 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:35:26,175 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:26,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash -634317376, now seen corresponding path program 10 times [2018-10-10 15:35:26,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:35:27,600 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-10-10 15:35:27,909 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-10-10 15:35:32,467 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2018-10-10 15:35:38,663 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2018-10-10 15:35:43,734 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-10-10 15:35:44,577 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-10-10 15:35:44,859 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2018-10-10 15:35:45,128 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:35:45,394 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:35:45,686 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2018-10-10 15:35:46,168 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-10-10 15:35:46,436 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2018-10-10 15:36:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:36:21,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:36:21,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-10-10 15:36:21,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-10 15:36:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-10 15:36:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-10-10 15:36:21,788 INFO L87 Difference]: Start difference. First operand 332 states and 334 transitions. Second operand 92 states. [2018-10-10 15:36:28,480 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2018-10-10 15:36:28,836 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2018-10-10 15:36:29,539 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2018-10-10 15:36:30,797 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2018-10-10 15:36:31,546 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2018-10-10 15:36:31,996 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2018-10-10 15:36:32,358 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2018-10-10 15:36:34,032 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2018-10-10 15:36:34,487 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2018-10-10 15:36:35,140 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2018-10-10 15:36:36,577 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2018-10-10 15:36:37,011 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2018-10-10 15:36:37,498 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2018-10-10 15:36:38,017 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2018-10-10 15:36:38,684 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:36:39,156 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2018-10-10 15:36:39,548 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2018-10-10 15:36:40,012 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2018-10-10 15:36:41,447 WARN L178 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2018-10-10 15:36:42,246 WARN L178 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 107 [2018-10-10 15:36:43,099 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-10-10 15:36:43,381 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-10-10 15:36:44,063 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:36:44,559 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2018-10-10 15:36:45,298 WARN L178 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 101 [2018-10-10 15:36:46,241 WARN L178 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 132 [2018-10-10 15:36:47,278 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2018-10-10 15:36:48,561 WARN L178 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 150 [2018-10-10 15:36:49,885 WARN L178 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 155 DAG size of output: 148 [2018-10-10 15:36:51,394 WARN L178 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 187 DAG size of output: 155 [2018-10-10 15:36:52,419 WARN L178 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2018-10-10 15:36:53,303 WARN L178 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 128 [2018-10-10 15:36:53,906 WARN L178 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2018-10-10 15:36:54,514 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 103 [2018-10-10 15:36:55,363 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2018-10-10 15:36:56,436 WARN L178 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 141 [2018-10-10 15:36:57,491 WARN L178 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 153 [2018-10-10 15:36:58,220 WARN L178 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2018-10-10 15:36:59,037 WARN L178 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2018-10-10 15:37:00,967 WARN L178 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 183 [2018-10-10 15:37:02,588 WARN L178 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 226 DAG size of output: 220 [2018-10-10 15:37:03,281 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2018-10-10 15:37:03,708 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2018-10-10 15:37:04,107 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2018-10-10 15:37:05,458 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2018-10-10 15:37:06,043 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2018-10-10 15:37:06,384 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2018-10-10 15:37:06,817 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2018-10-10 15:37:07,277 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2018-10-10 15:37:07,745 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2018-10-10 15:37:08,767 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2018-10-10 15:37:09,423 WARN L178 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 136 [2018-10-10 15:37:11,852 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-10-10 15:37:12,487 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2018-10-10 15:37:13,254 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2018-10-10 15:37:13,683 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2018-10-10 15:37:15,976 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-10-10 15:37:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:37:18,329 INFO L93 Difference]: Finished difference Result 434 states and 436 transitions. [2018-10-10 15:37:18,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-10 15:37:18,329 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 288 [2018-10-10 15:37:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:37:18,333 INFO L225 Difference]: With dead ends: 434 [2018-10-10 15:37:18,333 INFO L226 Difference]: Without dead ends: 432 [2018-10-10 15:37:18,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 62 SyntacticMatches, 40 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8567 ImplicationChecksByTransitivity, 88.4s TimeCoverageRelationStatistics Valid=1562, Invalid=39040, Unknown=0, NotChecked=0, Total=40602 [2018-10-10 15:37:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2018-10-10 15:37:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 360. [2018-10-10 15:37:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-10-10 15:37:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 362 transitions. [2018-10-10 15:37:18,341 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 362 transitions. Word has length 288 [2018-10-10 15:37:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:37:18,342 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 362 transitions. [2018-10-10 15:37:18,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-10 15:37:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 362 transitions. [2018-10-10 15:37:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-10 15:37:18,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:37:18,344 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:37:18,344 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:37:18,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:37:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash -298718857, now seen corresponding path program 11 times [2018-10-10 15:37:18,346 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:37:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:37:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 33 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:37:23,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:37:23,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-10 15:37:23,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-10 15:37:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-10 15:37:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4235, Unknown=0, NotChecked=0, Total=4422 [2018-10-10 15:37:23,260 INFO L87 Difference]: Start difference. First operand 360 states and 362 transitions. Second operand 67 states. [2018-10-10 15:37:29,957 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2018-10-10 15:37:30,292 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2018-10-10 15:37:30,557 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2018-10-10 15:37:30,864 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2018-10-10 15:37:31,199 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2018-10-10 15:37:31,546 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-10 15:37:31,925 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2018-10-10 15:37:32,295 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2018-10-10 15:37:32,607 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2018-10-10 15:37:32,975 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2018-10-10 15:37:33,538 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2018-10-10 15:37:35,298 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2018-10-10 15:37:35,699 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2018-10-10 15:37:36,266 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2018-10-10 15:37:36,924 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2018-10-10 15:37:37,339 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 92 [2018-10-10 15:37:37,816 WARN L178 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 99 [2018-10-10 15:37:38,284 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 97 [2018-10-10 15:37:38,885 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2018-10-10 15:37:39,565 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 101 [2018-10-10 15:37:40,092 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2018-10-10 15:37:40,680 WARN L178 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 115 [2018-10-10 15:37:41,269 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 120 [2018-10-10 15:37:42,107 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 115 [2018-10-10 15:37:42,395 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2018-10-10 15:37:42,723 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2018-10-10 15:37:43,094 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 98 [2018-10-10 15:37:43,430 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 100 [2018-10-10 15:37:43,779 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2018-10-10 15:37:44,047 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2018-10-10 15:37:44,367 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-10 15:37:44,771 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2018-10-10 15:37:45,016 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-10 15:37:45,275 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2018-10-10 15:37:45,794 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2018-10-10 15:37:46,439 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 101 [2018-10-10 15:37:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:37:47,940 INFO L93 Difference]: Finished difference Result 474 states and 476 transitions. [2018-10-10 15:37:47,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 15:37:47,940 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 302 [2018-10-10 15:37:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:37:47,944 INFO L225 Difference]: With dead ends: 474 [2018-10-10 15:37:47,944 INFO L226 Difference]: Without dead ends: 474 [2018-10-10 15:37:47,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5842 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3264, Invalid=24458, Unknown=0, NotChecked=0, Total=27722 [2018-10-10 15:37:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2018-10-10 15:37:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2018-10-10 15:37:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-10-10 15:37:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 362 transitions. [2018-10-10 15:37:47,952 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 362 transitions. Word has length 302 [2018-10-10 15:37:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:37:47,952 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 362 transitions. [2018-10-10 15:37:47,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-10 15:37:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 362 transitions. [2018-10-10 15:37:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-10 15:37:47,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:37:47,954 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:37:47,955 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:37:47,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:37:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1175459378, now seen corresponding path program 12 times [2018-10-10 15:37:47,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:37:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:37:48,581 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-10-10 15:37:52,844 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-10-10 15:37:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:37:56,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:37:56,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-10 15:37:56,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-10 15:37:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-10 15:37:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=6704, Unknown=0, NotChecked=0, Total=6972 [2018-10-10 15:37:56,930 INFO L87 Difference]: Start difference. First operand 360 states and 362 transitions. Second operand 84 states. [2018-10-10 15:38:00,454 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2018-10-10 15:38:01,662 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2018-10-10 15:38:02,455 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 15:38:03,159 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2018-10-10 15:38:03,465 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2018-10-10 15:38:03,706 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2018-10-10 15:38:04,678 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-10-10 15:38:04,960 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2018-10-10 15:38:05,357 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2018-10-10 15:38:05,801 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-10-10 15:38:06,175 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2018-10-10 15:38:06,502 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2018-10-10 15:38:06,914 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2018-10-10 15:38:07,348 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2018-10-10 15:38:07,762 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2018-10-10 15:38:08,134 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2018-10-10 15:38:08,442 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2018-10-10 15:38:08,777 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2018-10-10 15:38:09,601 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2018-10-10 15:38:09,963 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2018-10-10 15:38:10,249 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2018-10-10 15:38:10,985 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2018-10-10 15:38:11,230 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2018-10-10 15:38:11,602 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2018-10-10 15:38:12,044 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2018-10-10 15:38:12,536 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 101 [2018-10-10 15:38:13,175 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2018-10-10 15:38:13,550 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2018-10-10 15:38:13,922 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 100 [2018-10-10 15:38:14,352 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2018-10-10 15:38:14,838 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 101 [2018-10-10 15:38:15,276 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2018-10-10 15:38:15,737 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 118 [2018-10-10 15:38:16,566 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 113 [2018-10-10 15:38:16,911 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 109 [2018-10-10 15:38:17,391 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 114 [2018-10-10 15:38:17,754 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 116 [2018-10-10 15:38:18,051 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2018-10-10 15:38:18,376 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-10-10 15:38:18,686 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-10-10 15:38:20,337 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2018-10-10 15:38:20,756 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2018-10-10 15:38:21,063 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2018-10-10 15:38:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:38:24,762 INFO L93 Difference]: Finished difference Result 502 states and 504 transitions. [2018-10-10 15:38:24,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 15:38:24,763 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 316 [2018-10-10 15:38:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:38:24,766 INFO L225 Difference]: With dead ends: 502 [2018-10-10 15:38:24,767 INFO L226 Difference]: Without dead ends: 502 [2018-10-10 15:38:24,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10793 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=1528, Invalid=35914, Unknown=0, NotChecked=0, Total=37442 [2018-10-10 15:38:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2018-10-10 15:38:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 388. [2018-10-10 15:38:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 15:38:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2018-10-10 15:38:24,775 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 316 [2018-10-10 15:38:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:38:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2018-10-10 15:38:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-10 15:38:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2018-10-10 15:38:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-10 15:38:24,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:38:24,778 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:38:24,779 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:38:24,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:38:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 794989829, now seen corresponding path program 13 times [2018-10-10 15:38:24,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:38:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:38:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:38:35,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:38:35,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-10-10 15:38:35,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-10 15:38:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-10 15:38:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=10331, Unknown=0, NotChecked=0, Total=10712 [2018-10-10 15:38:35,154 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand 104 states. [2018-10-10 15:38:48,532 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2018-10-10 15:38:48,840 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2018-10-10 15:38:49,766 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-10-10 15:38:50,309 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2018-10-10 15:38:51,205 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2018-10-10 15:38:52,114 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2018-10-10 15:38:52,460 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2018-10-10 15:38:52,819 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2018-10-10 15:38:53,204 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2018-10-10 15:38:53,560 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2018-10-10 15:38:53,840 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2018-10-10 15:38:55,494 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 96 [2018-10-10 15:38:56,035 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 112 [2018-10-10 15:38:56,712 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2018-10-10 15:38:57,218 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2018-10-10 15:38:57,873 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2018-10-10 15:38:58,325 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2018-10-10 15:38:59,509 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2018-10-10 15:38:59,807 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2018-10-10 15:39:01,132 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-10-10 15:39:03,703 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:39:04,238 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2018-10-10 15:39:04,608 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2018-10-10 15:39:04,957 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2018-10-10 15:39:06,142 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2018-10-10 15:39:06,400 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2018-10-10 15:39:07,111 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2018-10-10 15:39:07,747 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2018-10-10 15:39:08,374 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2018-10-10 15:39:13,981 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:39:14,289 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2018-10-10 15:39:14,769 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2018-10-10 15:39:15,197 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2018-10-10 15:39:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:39:16,211 INFO L93 Difference]: Finished difference Result 612 states and 615 transitions. [2018-10-10 15:39:16,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 15:39:16,212 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 330 [2018-10-10 15:39:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:39:16,215 INFO L225 Difference]: With dead ends: 612 [2018-10-10 15:39:16,215 INFO L226 Difference]: Without dead ends: 612 [2018-10-10 15:39:16,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13452 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=2345, Invalid=53115, Unknown=0, NotChecked=0, Total=55460 [2018-10-10 15:39:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2018-10-10 15:39:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 431. [2018-10-10 15:39:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-10-10 15:39:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 434 transitions. [2018-10-10 15:39:16,225 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 434 transitions. Word has length 330 [2018-10-10 15:39:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:39:16,225 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 434 transitions. [2018-10-10 15:39:16,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-10 15:39:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 434 transitions. [2018-10-10 15:39:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-10 15:39:16,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:39:16,228 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:39:16,228 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:39:16,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:39:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash 474430684, now seen corresponding path program 14 times [2018-10-10 15:39:16,229 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:39:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:39:16,871 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-10 15:39:21,561 WARN L178 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-10-10 15:39:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:39:30,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:39:30,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-10-10 15:39:30,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-10 15:39:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-10 15:39:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=12194, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 15:39:30,180 INFO L87 Difference]: Start difference. First operand 431 states and 434 transitions. Second operand 113 states. [2018-10-10 15:39:34,693 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2018-10-10 15:39:35,022 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2018-10-10 15:39:40,744 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2018-10-10 15:39:41,111 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2018-10-10 15:39:41,361 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2018-10-10 15:39:43,067 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2018-10-10 15:39:43,501 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2018-10-10 15:39:44,165 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2018-10-10 15:39:44,655 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2018-10-10 15:39:45,077 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2018-10-10 15:39:45,531 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2018-10-10 15:39:46,009 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 83 [2018-10-10 15:39:46,608 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2018-10-10 15:39:47,070 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 76 [2018-10-10 15:39:47,479 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2018-10-10 15:39:47,911 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2018-10-10 15:39:49,145 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 89 [2018-10-10 15:39:49,690 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2018-10-10 15:39:50,066 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 88 [2018-10-10 15:39:51,592 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-10 15:39:51,970 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2018-10-10 15:39:52,406 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2018-10-10 15:39:52,868 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2018-10-10 15:39:53,412 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-10-10 15:39:53,889 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2018-10-10 15:39:54,356 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2018-10-10 15:39:54,850 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 86 [2018-10-10 15:39:55,895 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2018-10-10 15:39:56,399 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 85 [2018-10-10 15:39:57,725 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 97 [2018-10-10 15:39:58,292 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-10-10 15:39:58,763 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2018-10-10 15:39:59,212 WARN L178 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 92 [2018-10-10 15:40:00,741 WARN L178 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 122 [2018-10-10 15:40:01,449 WARN L178 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2018-10-10 15:40:02,010 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2018-10-10 15:40:02,400 WARN L178 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2018-10-10 15:40:02,796 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2018-10-10 15:40:03,238 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2018-10-10 15:40:04,029 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2018-10-10 15:40:04,367 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2018-10-10 15:40:05,261 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2018-10-10 15:40:05,841 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2018-10-10 15:40:06,681 WARN L178 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 123 [2018-10-10 15:40:07,274 WARN L178 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2018-10-10 15:40:07,760 WARN L178 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2018-10-10 15:40:08,065 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2018-10-10 15:40:08,373 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2018-10-10 15:40:09,833 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-10 15:40:10,793 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2018-10-10 15:40:11,544 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2018-10-10 15:40:12,004 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2018-10-10 15:40:14,768 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2018-10-10 15:40:15,187 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2018-10-10 15:40:15,859 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2018-10-10 15:40:16,318 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2018-10-10 15:40:16,649 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2018-10-10 15:40:16,865 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2018-10-10 15:40:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:40:21,690 INFO L93 Difference]: Finished difference Result 609 states and 612 transitions. [2018-10-10 15:40:21,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-10 15:40:21,690 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 344 [2018-10-10 15:40:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:40:21,694 INFO L225 Difference]: With dead ends: 609 [2018-10-10 15:40:21,695 INFO L226 Difference]: Without dead ends: 609 [2018-10-10 15:40:21,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20023 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=3334, Invalid=62972, Unknown=0, NotChecked=0, Total=66306 [2018-10-10 15:40:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2018-10-10 15:40:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 459. [2018-10-10 15:40:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-10-10 15:40:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 462 transitions. [2018-10-10 15:40:21,704 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 462 transitions. Word has length 344 [2018-10-10 15:40:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:40:21,705 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 462 transitions. [2018-10-10 15:40:21,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-10 15:40:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 462 transitions. [2018-10-10 15:40:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-10 15:40:21,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:40:21,707 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:40:21,708 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:40:21,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:40:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash 277184403, now seen corresponding path program 15 times [2018-10-10 15:40:21,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:40:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:40:24,246 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-10-10 15:40:28,413 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2018-10-10 15:40:28,772 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2018-10-10 15:40:30,055 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2018-10-10 15:40:30,477 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2018-10-10 15:40:30,894 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2018-10-10 15:40:31,397 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2018-10-10 15:40:32,861 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2018-10-10 15:40:34,902 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2018-10-10 15:40:35,343 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2018-10-10 15:40:37,295 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2018-10-10 15:40:38,520 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2018-10-10 15:40:39,492 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2018-10-10 15:40:40,112 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2018-10-10 15:40:41,939 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2018-10-10 15:40:43,092 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2018-10-10 15:40:43,797 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 51 [2018-10-10 15:40:48,759 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2018-10-10 15:40:49,697 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2018-10-10 15:40:50,414 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2018-10-10 15:40:51,276 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2018-10-10 15:40:54,802 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2018-10-10 15:40:58,431 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2018-10-10 15:40:59,579 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2018-10-10 15:41:04,580 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2018-10-10 15:41:07,108 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2018-10-10 15:41:09,783 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2018-10-10 15:41:10,076 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2018-10-10 15:41:10,375 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2018-10-10 15:41:10,700 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2018-10-10 15:41:11,028 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2018-10-10 15:41:11,431 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2018-10-10 15:41:11,850 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2018-10-10 15:41:12,259 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2018-10-10 15:41:12,617 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2018-10-10 15:41:13,023 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2018-10-10 15:41:13,363 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2018-10-10 15:41:13,734 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2018-10-10 15:41:14,119 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2018-10-10 15:41:14,460 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2018-10-10 15:41:14,780 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:15,097 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2018-10-10 15:41:15,418 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2018-10-10 15:41:15,746 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:16,086 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:16,477 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:16,870 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:17,223 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:41:18,191 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2018-10-10 15:41:20,190 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2018-10-10 15:41:21,397 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 50 [2018-10-10 15:41:24,589 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 52 [2018-10-10 15:41:32,431 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 43 [2018-10-10 15:41:33,572 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 43 [2018-10-10 15:41:34,749 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 43 [2018-10-10 15:41:50,310 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 39 [2018-10-10 15:41:53,332 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 39 [2018-10-10 15:41:54,286 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2018-10-10 15:41:56,536 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 31 [2018-10-10 15:41:57,388 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32