java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 15:44:05,329 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 15:44:05,334 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 15:44:05,352 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 15:44:05,353 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 15:44:05,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 15:44:05,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 15:44:05,357 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 15:44:05,359 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 15:44:05,363 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 15:44:05,364 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 15:44:05,364 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 15:44:05,365 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 15:44:05,366 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 15:44:05,369 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 15:44:05,371 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 15:44:05,372 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 15:44:05,375 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 15:44:05,382 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 15:44:05,383 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 15:44:05,386 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 15:44:05,388 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 15:44:05,390 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 15:44:05,401 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 15:44:05,433 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 15:44:05,434 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 15:44:05,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 15:44:05,435 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 15:44:05,436 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 15:44:05,436 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 15:44:05,437 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 15:44:05,437 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 15:44:05,437 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 15:44:05,437 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 15:44:05,438 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 15:44:05,438 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 15:44:05,438 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 15:44:05,438 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 15:44:05,438 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 15:44:05,439 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 15:44:05,440 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 15:44:05,441 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 15:44:05,441 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 15:44:05,441 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:44:05,441 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 15:44:05,441 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 15:44:05,442 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 15:44:05,442 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 15:44:05,442 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 15:44:05,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 15:44:05,442 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 15:44:05,443 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 15:44:05,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 15:44:05,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 15:44:05,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 15:44:05,523 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 15:44:05,524 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 15:44:05,524 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-23 15:44:05,575 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8808fdc53/e3b323b25ac24b4da03b9a7733af38fc/FLAG02992eacf [2018-10-23 15:44:06,033 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 15:44:06,034 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-23 15:44:06,050 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8808fdc53/e3b323b25ac24b4da03b9a7733af38fc/FLAG02992eacf [2018-10-23 15:44:06,067 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8808fdc53/e3b323b25ac24b4da03b9a7733af38fc [2018-10-23 15:44:06,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 15:44:06,078 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 15:44:06,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 15:44:06,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 15:44:06,083 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 15:44:06,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3816c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06, skipping insertion in model container [2018-10-23 15:44:06,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 15:44:06,118 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 15:44:06,294 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:44:06,299 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 15:44:06,320 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:44:06,342 INFO L193 MainTranslator]: Completed translation [2018-10-23 15:44:06,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06 WrapperNode [2018-10-23 15:44:06,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 15:44:06,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 15:44:06,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 15:44:06,345 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 15:44:06,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 15:44:06,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 15:44:06,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 15:44:06,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 15:44:06,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... [2018-10-23 15:44:06,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 15:44:06,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 15:44:06,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 15:44:06,417 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 15:44:06,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:44:06,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 15:44:06,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 15:44:06,868 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 15:44:06,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:44:06 BoogieIcfgContainer [2018-10-23 15:44:06,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 15:44:06,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 15:44:06,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 15:44:06,873 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 15:44:06,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 03:44:06" (1/3) ... [2018-10-23 15:44:06,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab5b6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:44:06, skipping insertion in model container [2018-10-23 15:44:06,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:44:06" (2/3) ... [2018-10-23 15:44:06,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab5b6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:44:06, skipping insertion in model container [2018-10-23 15:44:06,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:44:06" (3/3) ... [2018-10-23 15:44:06,877 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call1_true-termination.i [2018-10-23 15:44:06,887 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 15:44:06,895 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 15:44:06,914 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 15:44:06,948 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 15:44:06,949 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 15:44:06,949 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 15:44:06,949 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 15:44:06,949 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 15:44:06,949 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 15:44:06,950 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 15:44:06,950 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 15:44:06,950 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 15:44:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-23 15:44:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-23 15:44:06,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:06,971 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-23 15:44:06,974 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:06,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-10-23 15:44:06,983 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:06,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:07,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:07,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:07,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:44:07,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 15:44:07,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 15:44:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 15:44:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:44:07,129 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-23 15:44:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:07,148 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-23 15:44:07,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 15:44:07,151 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-23 15:44:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:07,170 INFO L225 Difference]: With dead ends: 21 [2018-10-23 15:44:07,170 INFO L226 Difference]: Without dead ends: 9 [2018-10-23 15:44:07,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:44:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-23 15:44:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-23 15:44:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-23 15:44:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-23 15:44:07,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-23 15:44:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:07,216 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-23 15:44:07,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 15:44:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-23 15:44:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 15:44:07,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:07,217 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:07,217 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:07,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-10-23 15:44:07,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:07,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:07,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:07,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:44:07,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 15:44:07,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 15:44:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 15:44:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:44:07,326 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-23 15:44:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:07,405 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-23 15:44:07,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:44:07,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 15:44:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:07,407 INFO L225 Difference]: With dead ends: 16 [2018-10-23 15:44:07,407 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 15:44:07,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:44:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 15:44:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-23 15:44:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 15:44:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-23 15:44:07,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-23 15:44:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:07,412 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-23 15:44:07,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 15:44:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-23 15:44:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:44:07,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:07,413 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:07,414 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:07,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-10-23 15:44:07,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:07,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:07,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:07,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:07,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:07,566 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:07,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:07,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:07,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:07,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-23 15:44:07,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:44:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:44:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:44:07,702 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-10-23 15:44:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:07,794 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-23 15:44:07,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 15:44:07,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-23 15:44:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:07,796 INFO L225 Difference]: With dead ends: 19 [2018-10-23 15:44:07,796 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 15:44:07,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:44:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 15:44:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-23 15:44:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 15:44:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 15:44:07,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-23 15:44:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:07,802 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 15:44:07,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:44:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 15:44:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:44:07,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:07,805 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:07,805 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:07,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-10-23 15:44:07,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:07,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:07,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:07,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:07,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:07,901 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:07,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:07,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:07,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:07,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:08,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:08,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-23 15:44:08,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 15:44:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 15:44:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:44:08,049 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-23 15:44:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:08,204 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 15:44:08,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:44:08,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-23 15:44:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:08,208 INFO L225 Difference]: With dead ends: 22 [2018-10-23 15:44:08,208 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 15:44:08,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:44:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 15:44:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-23 15:44:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 15:44:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 15:44:08,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-23 15:44:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:08,215 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 15:44:08,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 15:44:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 15:44:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 15:44:08,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:08,217 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:08,217 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:08,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-10-23 15:44:08,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:08,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:08,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:08,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:08,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:08,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:08,438 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:08,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:08,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 15:44:08,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:08,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:08,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:08,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-23 15:44:08,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 15:44:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 15:44:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-23 15:44:08,583 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-23 15:44:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:08,622 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 15:44:08,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 15:44:08,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-23 15:44:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:08,624 INFO L225 Difference]: With dead ends: 25 [2018-10-23 15:44:08,624 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 15:44:08,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-23 15:44:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 15:44:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-23 15:44:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 15:44:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 15:44:08,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-23 15:44:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:08,629 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 15:44:08,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 15:44:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 15:44:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 15:44:08,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:08,630 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:08,631 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:08,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:08,631 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-10-23 15:44:08,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:08,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:08,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:08,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:08,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:08,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:08,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:08,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:08,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:08,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:08,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:08,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:08,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-23 15:44:08,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:44:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:44:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:44:08,948 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-23 15:44:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:08,998 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 15:44:08,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 15:44:08,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-23 15:44:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:09,000 INFO L225 Difference]: With dead ends: 28 [2018-10-23 15:44:09,000 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 15:44:09,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:44:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 15:44:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-23 15:44:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 15:44:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 15:44:09,008 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-23 15:44:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:09,008 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 15:44:09,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:44:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 15:44:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 15:44:09,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:09,010 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:09,010 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:09,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-10-23 15:44:09,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:09,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:09,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:09,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:09,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:09,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:09,147 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:09,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:44:09,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 15:44:09,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:09,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:09,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:09,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-23 15:44:09,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 15:44:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 15:44:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:44:09,363 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-23 15:44:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:09,637 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 15:44:09,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 15:44:09,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-23 15:44:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:09,639 INFO L225 Difference]: With dead ends: 31 [2018-10-23 15:44:09,639 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 15:44:09,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:44:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 15:44:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-23 15:44:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 15:44:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 15:44:09,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-23 15:44:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:09,649 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 15:44:09,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 15:44:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 15:44:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 15:44:09,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:09,650 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:09,652 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:09,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-10-23 15:44:09,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:09,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:09,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:09,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:09,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:09,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:09,864 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:09,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:44:09,925 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 15:44:09,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:09,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:09,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:09,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-23 15:44:09,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 15:44:09,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 15:44:09,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-23 15:44:09,979 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-23 15:44:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:10,045 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 15:44:10,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 15:44:10,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-23 15:44:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:10,050 INFO L225 Difference]: With dead ends: 34 [2018-10-23 15:44:10,050 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 15:44:10,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-23 15:44:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 15:44:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-23 15:44:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 15:44:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 15:44:10,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-23 15:44:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:10,057 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 15:44:10,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 15:44:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 15:44:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 15:44:10,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:10,058 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:10,058 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:10,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-10-23 15:44:10,059 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:10,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:10,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:10,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:10,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:10,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:10,257 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:10,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:10,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:10,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:10,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-23 15:44:10,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 15:44:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 15:44:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:44:10,348 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-23 15:44:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:10,550 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 15:44:10,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 15:44:10,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-23 15:44:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:10,553 INFO L225 Difference]: With dead ends: 37 [2018-10-23 15:44:10,553 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 15:44:10,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:44:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 15:44:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-23 15:44:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 15:44:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 15:44:10,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-23 15:44:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:10,558 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 15:44:10,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 15:44:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 15:44:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 15:44:10,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:10,559 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:10,560 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:10,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-10-23 15:44:10,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:10,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:10,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:10,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:10,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:11,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:11,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:11,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:11,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:11,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:11,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:11,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:11,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-23 15:44:11,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 15:44:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 15:44:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-23 15:44:11,243 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-23 15:44:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:11,457 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 15:44:11,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 15:44:11,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-23 15:44:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:11,458 INFO L225 Difference]: With dead ends: 40 [2018-10-23 15:44:11,458 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 15:44:11,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-23 15:44:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 15:44:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-23 15:44:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 15:44:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 15:44:11,464 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-23 15:44:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:11,464 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 15:44:11,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 15:44:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 15:44:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 15:44:11,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:11,466 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:11,466 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:11,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-10-23 15:44:11,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:11,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:11,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:11,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:11,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:11,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:11,802 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:11,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:11,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-23 15:44:11,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:11,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:11,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:11,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-23 15:44:11,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 15:44:11,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 15:44:11,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:44:11,928 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-23 15:44:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:12,009 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 15:44:12,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 15:44:12,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-23 15:44:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:12,012 INFO L225 Difference]: With dead ends: 43 [2018-10-23 15:44:12,012 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 15:44:12,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:44:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 15:44:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-23 15:44:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 15:44:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 15:44:12,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-23 15:44:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:12,018 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 15:44:12,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 15:44:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 15:44:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 15:44:12,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:12,019 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:12,020 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:12,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-10-23 15:44:12,020 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:12,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:12,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:12,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:12,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:12,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:12,217 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:12,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:12,268 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:12,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:12,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:12,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:12,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-23 15:44:12,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 15:44:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 15:44:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-23 15:44:12,320 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-23 15:44:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:12,397 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 15:44:12,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 15:44:12,398 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-23 15:44:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:12,399 INFO L225 Difference]: With dead ends: 46 [2018-10-23 15:44:12,399 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 15:44:12,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-23 15:44:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 15:44:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-23 15:44:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 15:44:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 15:44:12,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-23 15:44:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:12,405 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 15:44:12,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 15:44:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 15:44:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 15:44:12,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:12,406 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:12,407 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:12,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-10-23 15:44:12,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:12,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:12,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:12,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:12,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:12,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:12,792 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:12,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:44:12,881 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-23 15:44:12,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:12,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:12,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:12,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-23 15:44:12,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 15:44:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 15:44:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-23 15:44:12,926 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-23 15:44:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:13,010 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 15:44:13,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 15:44:13,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-23 15:44:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:13,012 INFO L225 Difference]: With dead ends: 49 [2018-10-23 15:44:13,013 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 15:44:13,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-23 15:44:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 15:44:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-23 15:44:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 15:44:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 15:44:13,017 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-23 15:44:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:13,017 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 15:44:13,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 15:44:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 15:44:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 15:44:13,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:13,019 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:13,019 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:13,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-10-23 15:44:13,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:13,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:13,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:13,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:13,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:14,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:14,589 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:14,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:44:14,692 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 15:44:14,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:14,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:14,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:14,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-23 15:44:14,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 15:44:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 15:44:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:44:14,748 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-23 15:44:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:14,943 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 15:44:14,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 15:44:14,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-23 15:44:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:14,945 INFO L225 Difference]: With dead ends: 52 [2018-10-23 15:44:14,945 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 15:44:14,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:44:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 15:44:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-23 15:44:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 15:44:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 15:44:14,951 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-23 15:44:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 15:44:14,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 15:44:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 15:44:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 15:44:14,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:14,953 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:14,954 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:14,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-10-23 15:44:14,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:14,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:14,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:14,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:14,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:15,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:15,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:15,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:15,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:15,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:15,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-23 15:44:15,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 15:44:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 15:44:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-23 15:44:15,276 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-23 15:44:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:15,351 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 15:44:15,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 15:44:15,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-23 15:44:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:15,353 INFO L225 Difference]: With dead ends: 55 [2018-10-23 15:44:15,353 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 15:44:15,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-23 15:44:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 15:44:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-23 15:44:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 15:44:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 15:44:15,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-23 15:44:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:15,360 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 15:44:15,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 15:44:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 15:44:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 15:44:15,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:15,361 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:15,362 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:15,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-10-23 15:44:15,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:15,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:15,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:15,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:15,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:15,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:15,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:15,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:15,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:15,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:15,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:15,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:15,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-23 15:44:15,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 15:44:15,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 15:44:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:44:15,919 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-23 15:44:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:16,090 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 15:44:16,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 15:44:16,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-23 15:44:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:16,094 INFO L225 Difference]: With dead ends: 58 [2018-10-23 15:44:16,094 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 15:44:16,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:44:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 15:44:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-23 15:44:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 15:44:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 15:44:16,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-23 15:44:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:16,101 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 15:44:16,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 15:44:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 15:44:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 15:44:16,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:16,105 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:16,106 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:16,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-10-23 15:44:16,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:16,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:16,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:16,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:16,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:16,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:16,416 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:16,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:16,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-23 15:44:16,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:16,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:16,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:16,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-23 15:44:16,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 15:44:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 15:44:16,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-23 15:44:16,854 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-23 15:44:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:16,948 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 15:44:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 15:44:16,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-23 15:44:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:16,950 INFO L225 Difference]: With dead ends: 61 [2018-10-23 15:44:16,950 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 15:44:16,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-23 15:44:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 15:44:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-23 15:44:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 15:44:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 15:44:16,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-23 15:44:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:16,956 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 15:44:16,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 15:44:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 15:44:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 15:44:16,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:16,958 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:16,958 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:16,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-10-23 15:44:16,959 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:16,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:16,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:17,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:17,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:17,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:17,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:17,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:17,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:17,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:17,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-23 15:44:17,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 15:44:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 15:44:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:44:17,577 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-23 15:44:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:17,695 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 15:44:17,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 15:44:17,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-23 15:44:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:17,696 INFO L225 Difference]: With dead ends: 64 [2018-10-23 15:44:17,697 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 15:44:17,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:44:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 15:44:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-23 15:44:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 15:44:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 15:44:17,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-23 15:44:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:17,702 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 15:44:17,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 15:44:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 15:44:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 15:44:17,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:17,705 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:17,705 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:17,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-10-23 15:44:17,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:17,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:17,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:17,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:17,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:18,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:18,034 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:18,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:44:18,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-23 15:44:18,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:18,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:18,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:18,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-23 15:44:18,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 15:44:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 15:44:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:44:18,294 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-23 15:44:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:18,646 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-23 15:44:18,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 15:44:18,647 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-23 15:44:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:18,647 INFO L225 Difference]: With dead ends: 67 [2018-10-23 15:44:18,647 INFO L226 Difference]: Without dead ends: 63 [2018-10-23 15:44:18,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:44:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-23 15:44:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-23 15:44:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-23 15:44:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-23 15:44:18,656 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-23 15:44:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:18,656 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-23 15:44:18,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 15:44:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-23 15:44:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 15:44:18,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:18,657 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:18,658 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:18,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-10-23 15:44:18,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:18,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:18,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:18,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:18,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:19,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:19,101 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:19,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:44:19,515 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-23 15:44:19,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:19,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:19,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:19,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-23 15:44:19,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 15:44:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 15:44:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-23 15:44:19,583 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-23 15:44:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:19,673 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-23 15:44:19,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 15:44:19,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-23 15:44:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:19,675 INFO L225 Difference]: With dead ends: 70 [2018-10-23 15:44:19,675 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 15:44:19,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-23 15:44:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 15:44:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-23 15:44:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 15:44:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-23 15:44:19,681 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-23 15:44:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:19,681 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-23 15:44:19,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 15:44:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-23 15:44:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 15:44:19,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:19,682 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:19,682 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:19,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-10-23 15:44:19,683 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:19,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:19,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:19,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:19,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:20,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:20,026 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:20,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:20,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:20,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:20,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-23 15:44:20,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 15:44:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 15:44:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-23 15:44:20,167 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-23 15:44:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:20,276 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-23 15:44:20,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 15:44:20,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-23 15:44:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:20,277 INFO L225 Difference]: With dead ends: 73 [2018-10-23 15:44:20,278 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 15:44:20,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-23 15:44:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 15:44:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-23 15:44:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 15:44:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-23 15:44:20,283 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-23 15:44:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:20,283 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-23 15:44:20,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 15:44:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-23 15:44:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 15:44:20,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:20,285 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:20,285 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:20,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-10-23 15:44:20,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:20,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:20,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:20,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:20,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:20,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:20,918 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:20,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:20,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:20,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:20,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:21,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:21,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-23 15:44:21,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 15:44:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 15:44:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-23 15:44:21,046 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-23 15:44:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:21,162 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-23 15:44:21,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 15:44:21,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-23 15:44:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:21,166 INFO L225 Difference]: With dead ends: 76 [2018-10-23 15:44:21,166 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 15:44:21,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-23 15:44:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 15:44:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-23 15:44:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-23 15:44:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-23 15:44:21,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-23 15:44:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:21,170 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-23 15:44:21,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 15:44:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-23 15:44:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 15:44:21,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:21,171 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:21,172 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:21,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-10-23 15:44:21,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:21,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:21,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:21,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:21,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:21,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:21,653 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:21,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:22,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-23 15:44:22,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:22,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:22,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:22,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-23 15:44:22,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 15:44:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 15:44:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-23 15:44:22,570 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-23 15:44:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:22,748 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-23 15:44:22,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 15:44:22,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-23 15:44:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:22,749 INFO L225 Difference]: With dead ends: 79 [2018-10-23 15:44:22,749 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 15:44:22,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-23 15:44:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 15:44:22,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-23 15:44:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 15:44:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-23 15:44:22,754 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-23 15:44:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:22,754 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-23 15:44:22,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 15:44:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-23 15:44:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 15:44:22,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:22,756 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:22,756 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:22,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-10-23 15:44:22,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:22,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:22,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:22,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:22,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:23,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:23,642 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:23,650 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:23,726 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:23,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:23,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:23,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:23,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-23 15:44:23,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 15:44:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 15:44:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 15:44:23,863 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-23 15:44:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:23,973 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-23 15:44:23,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 15:44:23,973 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-23 15:44:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:23,974 INFO L225 Difference]: With dead ends: 82 [2018-10-23 15:44:23,975 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 15:44:23,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 15:44:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 15:44:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-23 15:44:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-23 15:44:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-23 15:44:23,979 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-23 15:44:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:23,980 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-23 15:44:23,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 15:44:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-23 15:44:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 15:44:23,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:23,980 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:23,981 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:23,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-10-23 15:44:23,981 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:23,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:23,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:23,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:23,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:24,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:24,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:24,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:44:25,045 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-23 15:44:25,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:25,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:25,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:25,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-23 15:44:25,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 15:44:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 15:44:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-23 15:44:25,102 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-23 15:44:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:25,213 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-23 15:44:25,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 15:44:25,213 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-23 15:44:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:25,215 INFO L225 Difference]: With dead ends: 85 [2018-10-23 15:44:25,215 INFO L226 Difference]: Without dead ends: 81 [2018-10-23 15:44:25,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-23 15:44:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-23 15:44:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-23 15:44:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-23 15:44:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-23 15:44:25,218 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-23 15:44:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:25,218 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-23 15:44:25,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 15:44:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-23 15:44:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 15:44:25,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:25,219 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:25,220 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:25,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-10-23 15:44:25,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:25,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:25,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:25,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:25,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:26,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:26,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:26,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:44:26,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-23 15:44:26,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:26,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:27,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:27,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-23 15:44:27,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 15:44:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 15:44:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 15:44:27,025 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-23 15:44:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:27,230 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-23 15:44:27,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 15:44:27,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-23 15:44:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:27,231 INFO L225 Difference]: With dead ends: 88 [2018-10-23 15:44:27,232 INFO L226 Difference]: Without dead ends: 84 [2018-10-23 15:44:27,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 15:44:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-23 15:44:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-23 15:44:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-23 15:44:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-23 15:44:27,236 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-23 15:44:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:27,237 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-23 15:44:27,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 15:44:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-23 15:44:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-23 15:44:27,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:27,237 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:27,238 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:27,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-10-23 15:44:27,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:27,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:27,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:27,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:27,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:28,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:28,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:28,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:28,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:28,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:28,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-23 15:44:28,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 15:44:28,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 15:44:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-23 15:44:28,644 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-23 15:44:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:28,764 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-23 15:44:28,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 15:44:28,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-23 15:44:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:28,766 INFO L225 Difference]: With dead ends: 91 [2018-10-23 15:44:28,766 INFO L226 Difference]: Without dead ends: 87 [2018-10-23 15:44:28,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-23 15:44:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-23 15:44:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-23 15:44:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-23 15:44:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-23 15:44:28,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-23 15:44:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:28,771 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-23 15:44:28,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 15:44:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-23 15:44:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-23 15:44:28,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:28,771 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:28,772 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:28,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-10-23 15:44:28,772 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:28,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:28,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:28,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:28,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:29,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:29,850 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:29,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:29,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:29,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:29,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:29,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:29,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-23 15:44:29,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-23 15:44:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-23 15:44:29,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-23 15:44:29,984 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-23 15:44:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:30,129 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-23 15:44:30,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 15:44:30,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-23 15:44:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:30,131 INFO L225 Difference]: With dead ends: 94 [2018-10-23 15:44:30,131 INFO L226 Difference]: Without dead ends: 90 [2018-10-23 15:44:30,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-23 15:44:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-23 15:44:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-23 15:44:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-23 15:44:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-23 15:44:30,134 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-23 15:44:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:30,134 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-23 15:44:30,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-23 15:44:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-23 15:44:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-23 15:44:30,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:30,135 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:30,136 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:30,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-10-23 15:44:30,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:30,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:30,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:30,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:30,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:30,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:30,543 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:30,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:33,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-23 15:44:33,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:33,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:33,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:33,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-23 15:44:33,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 15:44:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 15:44:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-23 15:44:33,360 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-23 15:44:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:33,457 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-23 15:44:33,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 15:44:33,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-23 15:44:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:33,459 INFO L225 Difference]: With dead ends: 97 [2018-10-23 15:44:33,459 INFO L226 Difference]: Without dead ends: 93 [2018-10-23 15:44:33,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-23 15:44:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-23 15:44:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-23 15:44:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-23 15:44:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-23 15:44:33,464 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-23 15:44:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:33,465 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-23 15:44:33,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 15:44:33,465 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-23 15:44:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-23 15:44:33,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:33,466 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:33,466 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:33,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-10-23 15:44:33,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:33,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:33,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:33,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:33,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:34,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:34,303 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:34,311 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:34,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:34,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:34,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:34,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:34,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-23 15:44:34,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 15:44:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 15:44:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 15:44:34,488 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-23 15:44:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:34,616 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-23 15:44:34,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 15:44:34,617 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-23 15:44:34,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:34,618 INFO L225 Difference]: With dead ends: 100 [2018-10-23 15:44:34,618 INFO L226 Difference]: Without dead ends: 96 [2018-10-23 15:44:34,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 15:44:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-23 15:44:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-23 15:44:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-23 15:44:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-23 15:44:34,623 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-23 15:44:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:34,623 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-23 15:44:34,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 15:44:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-23 15:44:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-23 15:44:34,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:34,624 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:34,624 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:34,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-10-23 15:44:34,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:34,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:34,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:34,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:35,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:35,198 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:35,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:44:36,119 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-23 15:44:36,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:36,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:36,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:36,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-23 15:44:36,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-23 15:44:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-23 15:44:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 15:44:36,205 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-23 15:44:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:36,435 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-23 15:44:36,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 15:44:36,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-23 15:44:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:36,436 INFO L225 Difference]: With dead ends: 103 [2018-10-23 15:44:36,436 INFO L226 Difference]: Without dead ends: 99 [2018-10-23 15:44:36,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 15:44:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-23 15:44:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-23 15:44:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-23 15:44:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-23 15:44:36,440 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-23 15:44:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:36,441 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-23 15:44:36,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-23 15:44:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-23 15:44:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-23 15:44:36,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:36,442 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:36,442 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:36,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-10-23 15:44:36,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:36,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:36,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:37,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:37,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:37,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:44:46,007 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-23 15:44:46,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:46,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:46,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:46,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-23 15:44:46,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 15:44:46,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 15:44:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 15:44:46,075 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-23 15:44:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:46,247 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-23 15:44:46,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-23 15:44:46,248 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-23 15:44:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:46,249 INFO L225 Difference]: With dead ends: 106 [2018-10-23 15:44:46,249 INFO L226 Difference]: Without dead ends: 102 [2018-10-23 15:44:46,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 15:44:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-23 15:44:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-23 15:44:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-23 15:44:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-23 15:44:46,254 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-23 15:44:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-23 15:44:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 15:44:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-23 15:44:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-23 15:44:46,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:46,255 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:46,256 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:46,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-10-23 15:44:46,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:46,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:46,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:46,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:46,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:47,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:47,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:47,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:48,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:48,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:48,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-23 15:44:48,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-23 15:44:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-23 15:44:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 15:44:48,111 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-23 15:44:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:48,276 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-23 15:44:48,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 15:44:48,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-23 15:44:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:48,278 INFO L225 Difference]: With dead ends: 109 [2018-10-23 15:44:48,278 INFO L226 Difference]: Without dead ends: 105 [2018-10-23 15:44:48,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 15:44:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-23 15:44:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-23 15:44:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-23 15:44:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-23 15:44:48,282 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-23 15:44:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:48,282 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-23 15:44:48,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-23 15:44:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-23 15:44:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-23 15:44:48,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:48,283 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:48,283 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:48,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-10-23 15:44:48,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:48,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:48,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:48,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:48,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:49,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:49,682 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:49,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:49,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:49,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:49,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:49,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:49,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-23 15:44:49,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-23 15:44:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-23 15:44:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 15:44:49,813 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-23 15:44:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:49,929 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-23 15:44:49,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-23 15:44:49,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-23 15:44:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:49,931 INFO L225 Difference]: With dead ends: 112 [2018-10-23 15:44:49,931 INFO L226 Difference]: Without dead ends: 108 [2018-10-23 15:44:49,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 15:44:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-23 15:44:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-23 15:44:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-23 15:44:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-23 15:44:49,936 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-23 15:44:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:49,936 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-23 15:44:49,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-23 15:44:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-23 15:44:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-23 15:44:49,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:49,937 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:49,937 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:49,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-10-23 15:44:49,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:49,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:49,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:49,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:49,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:51,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:51,304 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:51,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:44:57,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-23 15:44:57,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:57,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:57,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:57,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-23 15:44:57,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 15:44:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 15:44:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 15:44:57,314 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-23 15:44:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:57,507 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-23 15:44:57,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 15:44:57,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-23 15:44:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:57,508 INFO L225 Difference]: With dead ends: 115 [2018-10-23 15:44:57,508 INFO L226 Difference]: Without dead ends: 111 [2018-10-23 15:44:57,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 15:44:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-23 15:44:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-23 15:44:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-23 15:44:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-23 15:44:57,512 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-23 15:44:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:57,513 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-23 15:44:57,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 15:44:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-23 15:44:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-23 15:44:57,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:57,513 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:57,514 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:57,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-10-23 15:44:57,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:57,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:57,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:57,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:57,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:58,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:58,531 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:58,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:44:58,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:44:58,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:58,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:58,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:58,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-23 15:44:58,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-23 15:44:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-23 15:44:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 15:44:58,679 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-23 15:44:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:58,805 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-23 15:44:58,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 15:44:58,805 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-23 15:44:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:58,806 INFO L225 Difference]: With dead ends: 118 [2018-10-23 15:44:58,807 INFO L226 Difference]: Without dead ends: 114 [2018-10-23 15:44:58,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 15:44:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-23 15:44:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-23 15:44:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-23 15:44:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-23 15:44:58,811 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-23 15:44:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:58,811 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-23 15:44:58,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-23 15:44:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-23 15:44:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-23 15:44:58,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:58,812 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:58,812 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:58,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:58,812 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-10-23 15:44:58,812 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:58,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:58,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:58,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:44:58,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:59,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:59,413 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:59,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:45:06,164 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-23 15:45:06,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:06,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:06,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:06,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-23 15:45:06,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-23 15:45:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-23 15:45:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 15:45:06,223 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-23 15:45:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:06,359 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-23 15:45:06,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-23 15:45:06,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-23 15:45:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:06,360 INFO L225 Difference]: With dead ends: 121 [2018-10-23 15:45:06,361 INFO L226 Difference]: Without dead ends: 117 [2018-10-23 15:45:06,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 15:45:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-23 15:45:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-23 15:45:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-23 15:45:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-23 15:45:06,364 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-23 15:45:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:06,364 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-23 15:45:06,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-23 15:45:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-23 15:45:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-23 15:45:06,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:06,365 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:06,366 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:06,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-10-23 15:45:06,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:06,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:06,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:07,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:07,127 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:07,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:45:20,099 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-23 15:45:20,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:20,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:20,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:20,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-23 15:45:20,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 15:45:20,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 15:45:20,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 15:45:20,184 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-23 15:45:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:20,632 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-23 15:45:20,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-23 15:45:20,633 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-23 15:45:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:20,634 INFO L225 Difference]: With dead ends: 124 [2018-10-23 15:45:20,634 INFO L226 Difference]: Without dead ends: 120 [2018-10-23 15:45:20,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 15:45:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-23 15:45:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-23 15:45:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-23 15:45:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-23 15:45:20,639 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-23 15:45:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:20,639 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-23 15:45:20,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 15:45:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-23 15:45:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-23 15:45:20,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:20,640 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:20,640 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:20,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:20,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-10-23 15:45:20,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:20,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:20,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:20,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:20,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:21,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:21,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:21,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:45:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:21,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:21,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:21,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-23 15:45:21,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-23 15:45:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-23 15:45:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 15:45:21,661 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-23 15:45:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:21,815 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-23 15:45:21,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 15:45:21,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-23 15:45:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:21,817 INFO L225 Difference]: With dead ends: 127 [2018-10-23 15:45:21,817 INFO L226 Difference]: Without dead ends: 123 [2018-10-23 15:45:21,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 15:45:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-23 15:45:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-23 15:45:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-23 15:45:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-23 15:45:21,821 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-23 15:45:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:21,821 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-23 15:45:21,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-23 15:45:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-23 15:45:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-23 15:45:21,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:21,822 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:21,822 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:21,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-10-23 15:45:21,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:21,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:21,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:45:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:22,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:22,534 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:22,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:45:22,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:45:22,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:22,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:22,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:22,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-23 15:45:22,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-23 15:45:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-23 15:45:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 15:45:22,776 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-23 15:45:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:23,969 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-23 15:45:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-23 15:45:23,969 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-23 15:45:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:23,970 INFO L225 Difference]: With dead ends: 130 [2018-10-23 15:45:23,970 INFO L226 Difference]: Without dead ends: 126 [2018-10-23 15:45:23,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 15:45:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-23 15:45:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-23 15:45:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-23 15:45:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-23 15:45:23,974 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-23 15:45:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:23,975 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-23 15:45:23,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-23 15:45:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-23 15:45:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-23 15:45:23,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:23,976 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:23,976 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:23,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-10-23 15:45:23,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:23,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:23,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:24,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:24,812 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-23 15:45:24,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:37,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-23 15:45:37,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:37,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:37,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:37,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-23 15:45:37,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 15:45:37,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 15:45:37,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 15:45:37,076 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-23 15:45:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:37,387 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-23 15:45:37,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-23 15:45:37,387 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-23 15:45:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:37,388 INFO L225 Difference]: With dead ends: 133 [2018-10-23 15:45:37,389 INFO L226 Difference]: Without dead ends: 129 [2018-10-23 15:45:37,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 15:45:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-23 15:45:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-23 15:45:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-23 15:45:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-23 15:45:37,395 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-23 15:45:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:37,395 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-23 15:45:37,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 15:45:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-23 15:45:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-23 15:45:37,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:37,396 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:37,397 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:37,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-10-23 15:45:37,397 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:37,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:37,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:37,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:37,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:38,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:38,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:38,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:45:38,385 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:45:38,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:38,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:38,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:38,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-23 15:45:38,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-23 15:45:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-23 15:45:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 15:45:38,457 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-23 15:45:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:38,695 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-23 15:45:38,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 15:45:38,696 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-23 15:45:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:38,697 INFO L225 Difference]: With dead ends: 136 [2018-10-23 15:45:38,697 INFO L226 Difference]: Without dead ends: 132 [2018-10-23 15:45:38,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 15:45:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-23 15:45:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-23 15:45:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-23 15:45:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-23 15:45:38,700 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-23 15:45:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:38,701 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-23 15:45:38,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-23 15:45:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-23 15:45:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-23 15:45:38,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:38,702 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:38,702 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:38,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-10-23 15:45:38,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:38,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:38,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:38,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:38,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:39,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:39,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:39,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:45:55,588 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-23 15:45:55,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:45:55,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:45:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:55,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:45:55,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-23 15:45:55,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-23 15:45:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-23 15:45:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 15:45:55,711 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-23 15:45:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:45:55,952 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-23 15:45:55,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-23 15:45:55,953 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-23 15:45:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:45:55,954 INFO L225 Difference]: With dead ends: 139 [2018-10-23 15:45:55,954 INFO L226 Difference]: Without dead ends: 135 [2018-10-23 15:45:55,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 15:45:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-23 15:45:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-23 15:45:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-23 15:45:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-23 15:45:55,961 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-23 15:45:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:45:55,961 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-23 15:45:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-23 15:45:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-23 15:45:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-23 15:45:55,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:45:55,962 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-23 15:45:55,963 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:45:55,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:45:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-10-23 15:45:55,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:45:55,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:45:55,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:55,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:45:55,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:45:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:45:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:45:57,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:45:57,193 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:45:57,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:46:40,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-23 15:46:40,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:46:40,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:46:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:40,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:46:40,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-23 15:46:40,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 15:46:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 15:46:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 15:46:40,395 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-23 15:46:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:46:41,130 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-23 15:46:41,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-23 15:46:41,131 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-23 15:46:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:46:41,132 INFO L225 Difference]: With dead ends: 142 [2018-10-23 15:46:41,132 INFO L226 Difference]: Without dead ends: 138 [2018-10-23 15:46:41,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 15:46:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-23 15:46:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-23 15:46:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-23 15:46:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-23 15:46:41,137 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-23 15:46:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:46:41,138 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-23 15:46:41,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 15:46:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-23 15:46:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-23 15:46:41,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:46:41,139 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-23 15:46:41,139 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:46:41,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:46:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-10-23 15:46:41,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:46:41,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:46:41,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:41,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:46:41,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:46:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:42,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:46:42,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:46:42,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:46:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:46:42,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:46:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:42,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:46:42,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-23 15:46:42,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-23 15:46:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-23 15:46:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 15:46:42,345 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-23 15:46:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:46:42,563 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-23 15:46:42,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 15:46:42,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-23 15:46:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:46:42,565 INFO L225 Difference]: With dead ends: 145 [2018-10-23 15:46:42,565 INFO L226 Difference]: Without dead ends: 141 [2018-10-23 15:46:42,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 15:46:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-23 15:46:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-23 15:46:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-23 15:46:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-23 15:46:42,569 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-23 15:46:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:46:42,569 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-23 15:46:42,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-23 15:46:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-23 15:46:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-23 15:46:42,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:46:42,570 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-23 15:46:42,571 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:46:42,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:46:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-10-23 15:46:42,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:46:42,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:46:42,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:42,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:46:42,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:46:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:43,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:46:43,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:46:43,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:46:43,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:46:43,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:46:43,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:46:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:43,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:46:43,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-23 15:46:43,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-23 15:46:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-23 15:46:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 15:46:43,953 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-23 15:46:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:46:44,162 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-23 15:46:44,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-23 15:46:44,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-23 15:46:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:46:44,164 INFO L225 Difference]: With dead ends: 148 [2018-10-23 15:46:44,164 INFO L226 Difference]: Without dead ends: 144 [2018-10-23 15:46:44,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 15:46:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-23 15:46:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-23 15:46:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-23 15:46:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-23 15:46:44,168 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-23 15:46:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:46:44,168 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-23 15:46:44,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-23 15:46:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-23 15:46:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-23 15:46:44,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:46:44,169 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-23 15:46:44,169 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:46:44,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:46:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-10-23 15:46:44,170 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:46:44,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:46:44,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:44,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:46:44,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:46:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:46:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:46:45,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:46:45,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:46:45,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:47:23,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-23 15:47:23,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:47:23,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:47:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:23,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:47:23,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-10-23 15:47:23,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 15:47:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 15:47:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 15:47:23,511 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-23 15:47:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:47:24,736 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-23 15:47:24,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-23 15:47:24,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-23 15:47:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:47:24,738 INFO L225 Difference]: With dead ends: 151 [2018-10-23 15:47:24,738 INFO L226 Difference]: Without dead ends: 147 [2018-10-23 15:47:24,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 15:47:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-23 15:47:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-23 15:47:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-23 15:47:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-23 15:47:24,742 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-23 15:47:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:47:24,742 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-23 15:47:24,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 15:47:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-23 15:47:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-23 15:47:24,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:47:24,743 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-23 15:47:24,743 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:47:24,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:47:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-10-23 15:47:24,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:47:24,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:47:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:24,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:47:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:47:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:25,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:47:25,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:47:25,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:47:25,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:47:25,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:47:25,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:47:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:25,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:47:25,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-23 15:47:25,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 15:47:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 15:47:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 15:47:25,984 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-23 15:47:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:47:26,334 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-23 15:47:26,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 15:47:26,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-23 15:47:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:47:26,336 INFO L225 Difference]: With dead ends: 154 [2018-10-23 15:47:26,336 INFO L226 Difference]: Without dead ends: 150 [2018-10-23 15:47:26,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 15:47:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-23 15:47:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-23 15:47:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-23 15:47:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-23 15:47:26,341 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-23 15:47:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:47:26,341 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-23 15:47:26,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 15:47:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-23 15:47:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-23 15:47:26,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:47:26,342 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-23 15:47:26,342 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:47:26,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:47:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-10-23 15:47:26,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:47:26,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:47:26,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:26,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:47:26,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:47:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:27,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:47:27,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:47:27,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:47:41,694 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-23 15:47:41,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:47:41,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:47:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:41,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:47:41,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-10-23 15:47:41,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-23 15:47:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-23 15:47:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 15:47:41,776 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-23 15:47:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:47:41,971 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-23 15:47:41,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 15:47:41,972 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-23 15:47:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:47:41,973 INFO L225 Difference]: With dead ends: 157 [2018-10-23 15:47:41,973 INFO L226 Difference]: Without dead ends: 153 [2018-10-23 15:47:41,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 15:47:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-23 15:47:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-23 15:47:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-23 15:47:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-23 15:47:41,978 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-23 15:47:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:47:41,978 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-23 15:47:41,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-23 15:47:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-23 15:47:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-23 15:47:41,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:47:41,979 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-23 15:47:41,980 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:47:41,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:47:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-10-23 15:47:41,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:47:41,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:47:41,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:41,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:47:41,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:47:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:47:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:47:43,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:47:43,042 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:47:43,049 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown