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 0.1.23-1dbac8b [2018-10-26 22:22:29,510 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:22:29,513 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:22:29,529 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:22:29,529 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:22:29,530 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:22:29,532 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:22:29,535 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:22:29,537 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:22:29,538 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:22:29,545 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:22:29,546 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:22:29,547 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:22:29,550 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:22:29,552 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:22:29,553 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:22:29,556 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:22:29,557 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:22:29,560 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:22:29,561 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:22:29,562 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:22:29,563 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:22:29,565 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:22:29,576 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 [2018-10-26 22:22:29,601 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:22:29,601 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:22:29,602 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:22:29,602 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:22:29,603 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:22:29,604 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:22:29,604 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:22:29,604 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:22:29,604 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:22:29,604 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:22:29,605 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:22:29,605 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:22:29,605 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:22:29,605 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:22:29,605 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:22:29,606 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:22:29,606 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:22:29,606 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:22:29,606 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:22:29,607 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:22:29,607 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:22:29,607 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:22:29,607 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:22:29,607 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:22:29,607 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:22:29,608 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:22:29,608 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:22:29,608 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:22:29,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:22:29,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:22:29,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:22:29,678 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:22:29,679 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:22:29,680 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-26 22:22:29,740 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5d16c5b/df84bd9202934bf8a4e62de44d75bcfd/FLAGf473d15bf [2018-10-26 22:22:30,159 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:22:30,160 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-26 22:22:30,165 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5d16c5b/df84bd9202934bf8a4e62de44d75bcfd/FLAGf473d15bf [2018-10-26 22:22:30,181 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5d16c5b/df84bd9202934bf8a4e62de44d75bcfd [2018-10-26 22:22:30,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:22:30,193 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:22:30,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:22:30,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:22:30,199 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:22:30,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8d5e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30, skipping insertion in model container [2018-10-26 22:22:30,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:22:30,235 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:22:30,462 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:22:30,466 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:22:30,489 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:22:30,514 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:22:30,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30 WrapperNode [2018-10-26 22:22:30,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:22:30,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:22:30,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:22:30,516 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:22:30,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:22:30,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:22:30,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:22:30,568 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:22:30,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (1/1) ... [2018-10-26 22:22:30,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:22:30,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:22:30,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:22:30,614 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:22:30,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (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 [2018-10-26 22:22:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:22:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:22:31,015 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:22:31,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:22:31 BoogieIcfgContainer [2018-10-26 22:22:31,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:22:31,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:22:31,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:22:31,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:22:31,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:22:30" (1/3) ... [2018-10-26 22:22:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67721748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:22:31, skipping insertion in model container [2018-10-26 22:22:31,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:30" (2/3) ... [2018-10-26 22:22:31,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67721748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:22:31, skipping insertion in model container [2018-10-26 22:22:31,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:22:31" (3/3) ... [2018-10-26 22:22:31,032 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call1_true-termination.i [2018-10-26 22:22:31,046 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:22:31,058 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:22:31,085 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:22:31,150 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:22:31,151 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:22:31,151 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:22:31,151 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:22:31,151 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:22:31,151 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:22:31,156 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:22:31,158 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:22:31,158 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:22:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-26 22:22:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-26 22:22:31,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:31,188 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-26 22:22:31,190 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:31,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-10-26 22:22:31,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:31,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:31,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:22:31,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:22:31,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:22:31,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:22:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:22:31,339 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-26 22:22:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:31,356 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-26 22:22:31,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:22:31,358 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-26 22:22:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:31,370 INFO L225 Difference]: With dead ends: 21 [2018-10-26 22:22:31,370 INFO L226 Difference]: Without dead ends: 9 [2018-10-26 22:22:31,374 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 [2018-10-26 22:22:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-26 22:22:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-26 22:22:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-26 22:22:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-26 22:22:31,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-26 22:22:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:31,412 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-26 22:22:31,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:22:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-26 22:22:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 22:22:31,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:31,413 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:31,414 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:31,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-10-26 22:22:31,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:31,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:31,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:31,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:22:31,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:22:31,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:22:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:22:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:22:31,473 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-26 22:22:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:31,509 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 22:22:31,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:22:31,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 22:22:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:31,512 INFO L225 Difference]: With dead ends: 16 [2018-10-26 22:22:31,512 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:22:31,513 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 [2018-10-26 22:22:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:22:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-26 22:22:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-26 22:22:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-26 22:22:31,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-26 22:22:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:31,517 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-26 22:22:31,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:22:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-26 22:22:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 22:22:31,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:31,518 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:31,519 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:31,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:31,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-10-26 22:22:31,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:31,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:31,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:31,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:31,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:31,625 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 [2018-10-26 22:22:31,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:31,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:31,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:31,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-26 22:22:31,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:22:31,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:22:31,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:22:31,755 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-10-26 22:22:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:31,835 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 22:22:31,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:22:31,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-26 22:22:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:31,836 INFO L225 Difference]: With dead ends: 19 [2018-10-26 22:22:31,837 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 22:22:31,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:22:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 22:22:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-26 22:22:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 22:22:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 22:22:31,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-26 22:22:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:31,841 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 22:22:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:22:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 22:22:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:22:31,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:31,843 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:31,843 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:31,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-10-26 22:22:31,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:31,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:31,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:31,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:31,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:31,960 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 [2018-10-26 22:22:31,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:32,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:32,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:32,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:32,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:32,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-26 22:22:32,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:22:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:22:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:22:32,167 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-26 22:22:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:32,250 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-26 22:22:32,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:22:32,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-26 22:22:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:32,251 INFO L225 Difference]: With dead ends: 22 [2018-10-26 22:22:32,252 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 22:22:32,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:22:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 22:22:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-26 22:22:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 22:22:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-26 22:22:32,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-26 22:22:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:32,257 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-26 22:22:32,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:22:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-26 22:22:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:22:32,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:32,258 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:32,258 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:32,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-10-26 22:22:32,259 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:32,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:32,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:32,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:32,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:32,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:32,445 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 [2018-10-26 22:22:32,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:32,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:22:32,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:32,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:32,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:32,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-26 22:22:32,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:22:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:22:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:22:32,605 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-26 22:22:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:32,672 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-26 22:22:32,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:22:32,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-26 22:22:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:32,674 INFO L225 Difference]: With dead ends: 25 [2018-10-26 22:22:32,675 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:22:32,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:22:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:22:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-26 22:22:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 22:22:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 22:22:32,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-26 22:22:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:32,680 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 22:22:32,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:22:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 22:22:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 22:22:32,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:32,681 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:32,682 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:32,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-10-26 22:22:32,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:32,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:32,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:32,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:32,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:32,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:32,845 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 [2018-10-26 22:22:32,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:32,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:32,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:32,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:33,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:33,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-26 22:22:33,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:22:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:22:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:22:33,011 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-26 22:22:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:33,065 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-26 22:22:33,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:22:33,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-26 22:22:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:33,069 INFO L225 Difference]: With dead ends: 28 [2018-10-26 22:22:33,069 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 22:22:33,070 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 [2018-10-26 22:22:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 22:22:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-26 22:22:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 22:22:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-26 22:22:33,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-26 22:22:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:33,075 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-26 22:22:33,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:22:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-26 22:22:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 22:22:33,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:33,076 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:33,077 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:33,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-10-26 22:22:33,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:33,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:33,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:33,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:33,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:33,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:33,230 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 [2018-10-26 22:22:33,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:33,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:22:33,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:33,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:33,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:33,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-26 22:22:33,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:22:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:22:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:22:33,466 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-26 22:22:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:33,722 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-26 22:22:33,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:22:33,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-26 22:22:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:33,723 INFO L225 Difference]: With dead ends: 31 [2018-10-26 22:22:33,724 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 22:22:33,724 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 [2018-10-26 22:22:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 22:22:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-26 22:22:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 22:22:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-26 22:22:33,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-26 22:22:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:33,729 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-26 22:22:33,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:22:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-26 22:22:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 22:22:33,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:33,730 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:33,731 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:33,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-10-26 22:22:33,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:33,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:33,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:33,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:33,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:33,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:33,922 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 [2018-10-26 22:22:33,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:33,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:22:33,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:33,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:34,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:34,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-26 22:22:34,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:22:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:22:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:22:34,055 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-26 22:22:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:34,153 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-26 22:22:34,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:22:34,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-26 22:22:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:34,155 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:22:34,155 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 22:22:34,155 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 [2018-10-26 22:22:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 22:22:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-26 22:22:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-26 22:22:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-26 22:22:34,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-26 22:22:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:34,161 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-26 22:22:34,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:22:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-26 22:22:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 22:22:34,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:34,163 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:34,164 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:34,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:34,164 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-10-26 22:22:34,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:34,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:34,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:34,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:34,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:34,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:34,385 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 [2018-10-26 22:22:34,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:34,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:34,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:34,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-26 22:22:34,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:22:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:22:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:22:34,477 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-26 22:22:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:34,561 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-26 22:22:34,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:22:34,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-26 22:22:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:34,564 INFO L225 Difference]: With dead ends: 37 [2018-10-26 22:22:34,564 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 22:22:34,565 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 [2018-10-26 22:22:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 22:22:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-26 22:22:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-26 22:22:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-26 22:22:34,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-26 22:22:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:34,570 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-26 22:22:34,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:22:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-26 22:22:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 22:22:34,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:34,571 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:34,572 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:34,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-10-26 22:22:34,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:34,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:34,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:34,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:34,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:34,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:34,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:22:34,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:34,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:34,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:34,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:34,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:34,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-26 22:22:34,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:22:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:22:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:22:34,905 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-26 22:22:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:35,106 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-26 22:22:35,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:22:35,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-26 22:22:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:35,108 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:22:35,108 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:22:35,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:22:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:22:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-26 22:22:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 22:22:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-26 22:22:35,113 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-26 22:22:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:35,113 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-26 22:22:35,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:22:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-26 22:22:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:22:35,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,115 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,115 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-10-26 22:22:35,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:35,506 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 [2018-10-26 22:22:35,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:35,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:22:35,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:35,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:35,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-26 22:22:35,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:22:35,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:22:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:22:35,799 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-26 22:22:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:35,874 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-26 22:22:35,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:22:35,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-26 22:22:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:35,878 INFO L225 Difference]: With dead ends: 43 [2018-10-26 22:22:35,878 INFO L226 Difference]: Without dead ends: 39 [2018-10-26 22:22:35,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:22:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-26 22:22:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-26 22:22:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:22:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-26 22:22:35,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-26 22:22:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:35,887 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-26 22:22:35,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:22:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-26 22:22:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 22:22:35,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,891 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,891 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-10-26 22:22:35,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:35,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:36,096 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 [2018-10-26 22:22:36,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:36,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:36,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:36,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:36,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-26 22:22:36,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:22:36,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:22:36,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:22:36,194 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-26 22:22:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:36,306 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-26 22:22:36,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:22:36,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-26 22:22:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:36,307 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:22:36,308 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 22:22:36,308 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 [2018-10-26 22:22:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 22:22:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-26 22:22:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-26 22:22:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-26 22:22:36,315 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-26 22:22:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:36,316 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-26 22:22:36,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:22:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-26 22:22:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 22:22:36,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:36,317 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:36,317 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:36,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-10-26 22:22:36,318 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:36,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:36,905 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 [2018-10-26 22:22:36,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:36,992 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:22:36,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:36,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:37,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:37,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-26 22:22:37,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:22:37,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:22:37,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:22:37,051 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-26 22:22:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:37,127 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-26 22:22:37,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:22:37,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-26 22:22:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:37,129 INFO L225 Difference]: With dead ends: 49 [2018-10-26 22:22:37,129 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 22:22:37,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:22:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 22:22:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-26 22:22:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:22:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-26 22:22:37,134 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-26 22:22:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:37,134 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-26 22:22:37,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:22:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-26 22:22:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 22:22:37,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:37,135 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:37,136 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:37,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-10-26 22:22:37,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:37,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:37,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:37,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:38,011 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 [2018-10-26 22:22:38,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:38,137 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 22:22:38,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:38,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:38,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-26 22:22:38,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:22:38,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:22:38,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:22:38,201 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-26 22:22:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:38,287 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-26 22:22:38,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:22:38,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-26 22:22:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:38,290 INFO L225 Difference]: With dead ends: 52 [2018-10-26 22:22:38,290 INFO L226 Difference]: Without dead ends: 48 [2018-10-26 22:22:38,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:22:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-26 22:22:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-26 22:22:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-26 22:22:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-26 22:22:38,295 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-26 22:22:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:38,296 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-26 22:22:38,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:22:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-26 22:22:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-26 22:22:38,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:38,297 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:38,297 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:38,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-10-26 22:22:38,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:38,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:38,512 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 [2018-10-26 22:22:38,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:38,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:38,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-26 22:22:38,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:22:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:22:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:22:38,619 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-26 22:22:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:38,687 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-26 22:22:38,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:22:38,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-26 22:22:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:38,688 INFO L225 Difference]: With dead ends: 55 [2018-10-26 22:22:38,689 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 22:22:38,690 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 [2018-10-26 22:22:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 22:22:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-26 22:22:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-26 22:22:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-26 22:22:38,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-26 22:22:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:38,695 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-26 22:22:38,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:22:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-26 22:22:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-26 22:22:38,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:38,696 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:38,697 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:38,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-10-26 22:22:38,697 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:38,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:38,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:38,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:39,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:39,139 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 [2018-10-26 22:22:39,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:39,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:39,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:39,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:39,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:39,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-26 22:22:39,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:22:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:22:39,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:22:39,313 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-26 22:22:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:39,508 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-26 22:22:39,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:22:39,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-26 22:22:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:39,520 INFO L225 Difference]: With dead ends: 58 [2018-10-26 22:22:39,520 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 22:22:39,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:22:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 22:22:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-26 22:22:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:22:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-26 22:22:39,525 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-26 22:22:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:39,526 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-26 22:22:39,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:22:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-26 22:22:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:22:39,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:39,527 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:39,527 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:39,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-10-26 22:22:39,528 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:39,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:39,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:39,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:39,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:39,819 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 [2018-10-26 22:22:39,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:40,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 22:22:40,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:40,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:40,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-26 22:22:40,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:22:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:22:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:22:40,273 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-26 22:22:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:40,342 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-26 22:22:40,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:22:40,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-26 22:22:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:40,344 INFO L225 Difference]: With dead ends: 61 [2018-10-26 22:22:40,344 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 22:22:40,345 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 [2018-10-26 22:22:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 22:22:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-26 22:22:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 22:22:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-26 22:22:40,350 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-26 22:22:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:40,350 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-26 22:22:40,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:22:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-26 22:22:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 22:22:40,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:40,351 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:40,352 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:40,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:40,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-10-26 22:22:40,352 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:40,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:40,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:40,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:40,741 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 [2018-10-26 22:22:40,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:40,790 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:40,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:40,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:40,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-26 22:22:40,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:22:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:22:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:22:40,854 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-26 22:22:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:40,968 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-26 22:22:40,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:22:40,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-26 22:22:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:40,970 INFO L225 Difference]: With dead ends: 64 [2018-10-26 22:22:40,970 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 22:22:40,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:22:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 22:22:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-26 22:22:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-26 22:22:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-26 22:22:40,976 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-26 22:22:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:40,977 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-26 22:22:40,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:22:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-26 22:22:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-26 22:22:40,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:40,978 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:40,978 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:40,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-10-26 22:22:40,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:40,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:40,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:40,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:41,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:41,392 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 [2018-10-26 22:22:41,400 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:41,601 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 22:22:41,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:41,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:41,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:41,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-26 22:22:41,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:22:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:22:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:22:41,662 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-26 22:22:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:41,848 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-26 22:22:41,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:22:41,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-26 22:22:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:41,850 INFO L225 Difference]: With dead ends: 67 [2018-10-26 22:22:41,850 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 22:22:41,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:22:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 22:22:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-26 22:22:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:22:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-26 22:22:41,856 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-26 22:22:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:41,857 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-26 22:22:41,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:22:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-26 22:22:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-26 22:22:41,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:41,858 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:41,858 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:41,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:41,858 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-10-26 22:22:41,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:41,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:41,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:41,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:41,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:42,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:42,207 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 [2018-10-26 22:22:42,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:42,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 22:22:42,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:42,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:42,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:42,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-26 22:22:42,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:22:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:22:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:22:42,679 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-26 22:22:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:42,786 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-26 22:22:42,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:22:42,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-26 22:22:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:42,787 INFO L225 Difference]: With dead ends: 70 [2018-10-26 22:22:42,787 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 22:22:42,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:22:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 22:22:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-26 22:22:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-26 22:22:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-26 22:22:42,793 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-26 22:22:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:42,793 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-26 22:22:42,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:22:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-26 22:22:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:22:42,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:42,794 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:42,794 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:42,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-10-26 22:22:42,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:42,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:42,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:43,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:43,610 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 [2018-10-26 22:22:43,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:43,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:43,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:43,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-26 22:22:43,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:22:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:22:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:22:43,716 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-26 22:22:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:43,902 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-26 22:22:43,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:22:43,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-26 22:22:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:43,903 INFO L225 Difference]: With dead ends: 73 [2018-10-26 22:22:43,903 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 22:22:43,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:22:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 22:22:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-26 22:22:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-26 22:22:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-26 22:22:43,909 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-26 22:22:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:43,909 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-26 22:22:43,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:22:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-26 22:22:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 22:22:43,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:43,910 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:43,910 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:43,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-10-26 22:22:43,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:43,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:43,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:43,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:44,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:44,237 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 [2018-10-26 22:22:44,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:44,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:44,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:44,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:44,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:44,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-26 22:22:44,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:22:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:22:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:22:44,368 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-26 22:22:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:44,549 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-26 22:22:44,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:22:44,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-26 22:22:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:44,553 INFO L225 Difference]: With dead ends: 76 [2018-10-26 22:22:44,553 INFO L226 Difference]: Without dead ends: 72 [2018-10-26 22:22:44,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:22:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-26 22:22:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-26 22:22:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:22:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-26 22:22:44,558 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-26 22:22:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:44,558 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-26 22:22:44,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:22:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-26 22:22:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-26 22:22:44,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:44,559 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:44,560 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:44,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-10-26 22:22:44,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:44,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:44,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:44,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:44,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:45,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:45,456 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 [2018-10-26 22:22:45,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:46,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-26 22:22:46,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:46,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:46,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:46,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-26 22:22:46,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:22:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:22:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:22:46,373 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-26 22:22:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:46,475 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-26 22:22:46,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:22:46,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-26 22:22:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:46,477 INFO L225 Difference]: With dead ends: 79 [2018-10-26 22:22:46,477 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 22:22:46,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:22:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 22:22:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-26 22:22:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-26 22:22:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-26 22:22:46,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-26 22:22:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:46,484 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-26 22:22:46,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:22:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-26 22:22:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-26 22:22:46,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:46,485 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:46,485 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:46,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-10-26 22:22:46,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:46,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:46,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:46,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:46,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:46,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:46,851 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 [2018-10-26 22:22:46,859 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:46,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:46,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:46,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:47,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:47,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-26 22:22:47,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:22:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:22:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:22:47,097 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-26 22:22:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:47,526 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-26 22:22:47,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 22:22:47,527 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-26 22:22:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:47,528 INFO L225 Difference]: With dead ends: 82 [2018-10-26 22:22:47,528 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 22:22:47,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:22:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 22:22:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-26 22:22:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-26 22:22:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-26 22:22:47,532 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-26 22:22:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:47,532 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-26 22:22:47,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:22:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-26 22:22:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 22:22:47,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:47,533 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:47,534 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:47,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-10-26 22:22:47,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:47,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:47,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:47,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:47,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:48,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:48,017 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 [2018-10-26 22:22:48,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:48,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-26 22:22:48,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:48,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:48,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:48,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-26 22:22:48,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:22:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:22:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:22:48,646 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-26 22:22:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:48,767 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-26 22:22:48,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:22:48,768 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-26 22:22:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:48,769 INFO L225 Difference]: With dead ends: 85 [2018-10-26 22:22:48,769 INFO L226 Difference]: Without dead ends: 81 [2018-10-26 22:22:48,770 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 [2018-10-26 22:22:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-26 22:22:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-26 22:22:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:22:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-26 22:22:48,773 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-26 22:22:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:48,773 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-26 22:22:48,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:22:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-26 22:22:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 22:22:48,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:48,774 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:48,774 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:48,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-10-26 22:22:48,775 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:48,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:48,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:48,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:48,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:50,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:50,716 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 [2018-10-26 22:22:50,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:51,665 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-26 22:22:51,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:51,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:51,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:51,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-26 22:22:51,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:22:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:22:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:22:51,769 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-26 22:22:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:51,916 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-26 22:22:51,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:22:51,917 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-26 22:22:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:51,918 INFO L225 Difference]: With dead ends: 88 [2018-10-26 22:22:51,918 INFO L226 Difference]: Without dead ends: 84 [2018-10-26 22:22:51,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:22:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-26 22:22:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-26 22:22:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 22:22:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-26 22:22:51,921 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-26 22:22:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:51,922 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-26 22:22:51,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:22:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-26 22:22:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 22:22:51,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:51,923 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:51,923 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:51,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-10-26 22:22:51,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:51,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:51,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:51,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:51,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:54,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:54,153 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 [2018-10-26 22:22:54,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:54,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:54,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:54,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-26 22:22:54,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:22:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:22:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:22:54,311 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-26 22:22:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:54,453 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-26 22:22:54,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:22:54,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-26 22:22:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:54,455 INFO L225 Difference]: With dead ends: 91 [2018-10-26 22:22:54,455 INFO L226 Difference]: Without dead ends: 87 [2018-10-26 22:22:54,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:22:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-26 22:22:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-26 22:22:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-26 22:22:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-26 22:22:54,460 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-26 22:22:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:54,460 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-26 22:22:54,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:22:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-26 22:22:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-26 22:22:54,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:54,461 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:54,461 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:54,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-10-26 22:22:54,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:54,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:54,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:54,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:54,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:55,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:55,876 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 [2018-10-26 22:22:55,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:55,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:55,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:55,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:56,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:56,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-26 22:22:56,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:22:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:22:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:22:56,010 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-26 22:22:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:56,124 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-26 22:22:56,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:22:56,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-26 22:22:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:56,126 INFO L225 Difference]: With dead ends: 94 [2018-10-26 22:22:56,127 INFO L226 Difference]: Without dead ends: 90 [2018-10-26 22:22:56,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:22:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-26 22:22:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-26 22:22:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:22:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-26 22:22:56,130 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-26 22:22:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:56,131 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-26 22:22:56,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:22:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-26 22:22:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-26 22:22:56,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:56,132 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:56,132 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:56,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:56,132 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-10-26 22:22:56,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:56,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:56,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:56,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:56,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:56,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:56,624 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 [2018-10-26 22:22:56,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:59,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-26 22:22:59,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:59,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:59,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:59,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-26 22:22:59,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:22:59,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:22:59,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:22:59,358 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-26 22:22:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:59,452 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-26 22:22:59,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:22:59,453 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-26 22:22:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:59,453 INFO L225 Difference]: With dead ends: 97 [2018-10-26 22:22:59,454 INFO L226 Difference]: Without dead ends: 93 [2018-10-26 22:22:59,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:22:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-26 22:22:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-26 22:22:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-26 22:22:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-26 22:22:59,458 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-26 22:22:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:59,459 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-26 22:22:59,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:22:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-26 22:22:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-26 22:22:59,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:59,461 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:59,461 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:59,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-10-26 22:22:59,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:59,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:59,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:59,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:59,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:00,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:00,298 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 [2018-10-26 22:23:00,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:23:00,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:23:00,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:00,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:00,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:00,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-26 22:23:00,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:23:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:23:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:23:00,424 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-26 22:23:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:00,544 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-26 22:23:00,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:23:00,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-26 22:23:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:00,546 INFO L225 Difference]: With dead ends: 100 [2018-10-26 22:23:00,546 INFO L226 Difference]: Without dead ends: 96 [2018-10-26 22:23:00,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:23:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-26 22:23:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-26 22:23:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-26 22:23:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-26 22:23:00,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-26 22:23:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:00,551 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-26 22:23:00,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:23:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-26 22:23:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-26 22:23:00,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:00,552 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:00,552 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:00,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-10-26 22:23:00,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:00,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:00,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:00,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:00,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:01,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:01,620 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 [2018-10-26 22:23:01,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:23:02,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-26 22:23:02,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:02,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:02,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:02,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-26 22:23:02,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:23:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:23:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:23:02,662 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-26 22:23:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:02,942 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-26 22:23:02,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:23:02,943 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-26 22:23:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:02,944 INFO L225 Difference]: With dead ends: 103 [2018-10-26 22:23:02,944 INFO L226 Difference]: Without dead ends: 99 [2018-10-26 22:23:02,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:23:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-26 22:23:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-26 22:23:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:23:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-26 22:23:02,948 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-26 22:23:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:02,948 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-26 22:23:02,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:23:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-26 22:23:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 22:23:02,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:02,949 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:02,949 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:02,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-10-26 22:23:02,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:02,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:02,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:02,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:03,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:03,481 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 [2018-10-26 22:23:03,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:23:12,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-26 22:23:12,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:12,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:12,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:12,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-26 22:23:12,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:23:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:23:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:23:12,691 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-26 22:23:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:12,881 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-26 22:23:12,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:23:12,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-26 22:23:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:12,882 INFO L225 Difference]: With dead ends: 106 [2018-10-26 22:23:12,882 INFO L226 Difference]: Without dead ends: 102 [2018-10-26 22:23:12,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:23:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-26 22:23:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-26 22:23:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-26 22:23:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-26 22:23:12,887 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-26 22:23:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:12,888 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-26 22:23:12,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:23:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-26 22:23:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-26 22:23:12,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:12,889 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:12,889 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:12,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-10-26 22:23:12,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:12,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:12,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:12,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:12,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:13,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:13,541 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 [2018-10-26 22:23:13,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:13,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:13,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:13,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-26 22:23:13,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:23:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:23:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:23:13,686 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-26 22:23:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:13,852 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-26 22:23:13,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:23:13,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-26 22:23:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:13,854 INFO L225 Difference]: With dead ends: 109 [2018-10-26 22:23:13,854 INFO L226 Difference]: Without dead ends: 105 [2018-10-26 22:23:13,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:23:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-26 22:23:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-26 22:23:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-26 22:23:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-26 22:23:13,858 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-26 22:23:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:13,859 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-26 22:23:13,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:23:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-26 22:23:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-26 22:23:13,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:13,860 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:13,860 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:13,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-10-26 22:23:13,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:13,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:13,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:13,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:13,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:14,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:14,816 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 [2018-10-26 22:23:14,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:23:14,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:23:14,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:14,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:14,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:14,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-26 22:23:14,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:23:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:23:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:23:14,945 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-26 22:23:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:15,080 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-26 22:23:15,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:23:15,081 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-26 22:23:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:15,081 INFO L225 Difference]: With dead ends: 112 [2018-10-26 22:23:15,081 INFO L226 Difference]: Without dead ends: 108 [2018-10-26 22:23:15,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:23:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-26 22:23:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-26 22:23:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:23:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-26 22:23:15,085 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-26 22:23:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:15,086 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-26 22:23:15,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:23:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-26 22:23:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-26 22:23:15,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:15,086 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:15,087 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:15,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-10-26 22:23:15,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:15,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:15,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:15,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:15,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:16,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:16,518 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 [2018-10-26 22:23:16,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:23:22,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-26 22:23:22,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:22,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:22,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:22,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-26 22:23:22,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:23:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:23:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:23:22,759 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-26 22:23:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:22,918 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-26 22:23:22,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 22:23:22,919 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-26 22:23:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:22,920 INFO L225 Difference]: With dead ends: 115 [2018-10-26 22:23:22,920 INFO L226 Difference]: Without dead ends: 111 [2018-10-26 22:23:22,921 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 [2018-10-26 22:23:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-26 22:23:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-26 22:23:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-26 22:23:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-26 22:23:22,924 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-26 22:23:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:22,925 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-26 22:23:22,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:23:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-26 22:23:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 22:23:22,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:22,926 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:22,926 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:22,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:22,926 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-10-26 22:23:22,926 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:22,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:22,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:22,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:22,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:23,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:23,621 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 [2018-10-26 22:23:23,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:23:23,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:23:23,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:23,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:23,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:23,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-26 22:23:23,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:23:23,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:23:23,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:23:23,785 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-26 22:23:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:23,931 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-26 22:23:23,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-26 22:23:23,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-26 22:23:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:23,933 INFO L225 Difference]: With dead ends: 118 [2018-10-26 22:23:23,933 INFO L226 Difference]: Without dead ends: 114 [2018-10-26 22:23:23,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:23:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-26 22:23:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-26 22:23:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-26 22:23:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-26 22:23:23,937 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-26 22:23:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:23,937 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-26 22:23:23,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:23:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-26 22:23:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-26 22:23:23,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:23,938 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:23,938 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:23,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-10-26 22:23:23,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:23,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:23,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:23,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:23,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:24,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:24,689 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 [2018-10-26 22:23:24,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:23:31,006 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-26 22:23:31,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:31,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:31,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:31,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-26 22:23:31,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:23:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:23:31,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:23:31,070 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-26 22:23:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:31,220 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-26 22:23:31,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:23:31,220 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-26 22:23:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:31,221 INFO L225 Difference]: With dead ends: 121 [2018-10-26 22:23:31,222 INFO L226 Difference]: Without dead ends: 117 [2018-10-26 22:23:31,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:23:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-26 22:23:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-26 22:23:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:23:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-26 22:23:31,226 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-26 22:23:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:31,226 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-26 22:23:31,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:23:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-26 22:23:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-26 22:23:31,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:31,227 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:31,228 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:31,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-10-26 22:23:31,228 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:31,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:31,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:31,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:31,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:31,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:31,883 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 [2018-10-26 22:23:31,896 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:23:43,625 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-26 22:23:43,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:43,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:43,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:43,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-26 22:23:43,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:23:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:23:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:23:43,705 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-26 22:23:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:44,173 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-26 22:23:44,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:23:44,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-26 22:23:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:44,175 INFO L225 Difference]: With dead ends: 124 [2018-10-26 22:23:44,176 INFO L226 Difference]: Without dead ends: 120 [2018-10-26 22:23:44,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:23:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-26 22:23:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-26 22:23:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-26 22:23:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-26 22:23:44,180 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-26 22:23:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:44,181 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-26 22:23:44,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:23:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-26 22:23:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 22:23:44,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:44,182 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:44,182 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:44,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-10-26 22:23:44,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:44,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:44,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:44,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:44,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:44,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:44,990 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 [2018-10-26 22:23:44,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:45,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:45,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:45,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-26 22:23:45,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:23:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:23:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:23:45,219 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-26 22:23:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:45,376 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-26 22:23:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-26 22:23:45,377 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-26 22:23:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:45,378 INFO L225 Difference]: With dead ends: 127 [2018-10-26 22:23:45,378 INFO L226 Difference]: Without dead ends: 123 [2018-10-26 22:23:45,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:23:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-26 22:23:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-26 22:23:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-26 22:23:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-26 22:23:45,383 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-26 22:23:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:45,383 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-26 22:23:45,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:23:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-26 22:23:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-26 22:23:45,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:45,384 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:45,384 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:45,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-10-26 22:23:45,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:45,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:45,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:45,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:45,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:46,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:46,521 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 [2018-10-26 22:23:46,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:23:46,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:23:46,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:46,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:46,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:46,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-26 22:23:46,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:23:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:23:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:23:46,779 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-26 22:23:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:47,869 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-26 22:23:47,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:23:47,873 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-26 22:23:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:47,874 INFO L225 Difference]: With dead ends: 130 [2018-10-26 22:23:47,874 INFO L226 Difference]: Without dead ends: 126 [2018-10-26 22:23:47,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:23:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-26 22:23:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-26 22:23:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:23:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-26 22:23:47,878 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-26 22:23:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:47,879 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-26 22:23:47,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:23:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-26 22:23:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-26 22:23:47,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:47,880 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:47,880 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:47,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-10-26 22:23:47,880 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:47,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:47,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:48,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:48,700 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:48,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:24:01,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-26 22:24:01,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:01,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:01,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:01,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-26 22:24:01,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:24:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:24:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:24:01,393 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-26 22:24:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:01,698 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-26 22:24:01,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:24:01,699 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-26 22:24:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:01,700 INFO L225 Difference]: With dead ends: 133 [2018-10-26 22:24:01,700 INFO L226 Difference]: Without dead ends: 129 [2018-10-26 22:24:01,702 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 [2018-10-26 22:24:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-26 22:24:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-26 22:24:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-26 22:24:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-26 22:24:01,705 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-26 22:24:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:01,705 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-26 22:24:01,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:24:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-26 22:24:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 22:24:01,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:01,706 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:01,707 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:01,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-10-26 22:24:01,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:01,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:01,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:01,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:01,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:02,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:02,616 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 [2018-10-26 22:24:02,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:24:02,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:24:02,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:02,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:02,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:02,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-26 22:24:02,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:24:02,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:24:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:24:02,793 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-26 22:24:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:03,018 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-26 22:24:03,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:24:03,018 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-26 22:24:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:03,020 INFO L225 Difference]: With dead ends: 136 [2018-10-26 22:24:03,020 INFO L226 Difference]: Without dead ends: 132 [2018-10-26 22:24:03,020 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 [2018-10-26 22:24:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-26 22:24:03,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-26 22:24:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-26 22:24:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-26 22:24:03,024 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-26 22:24:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:03,024 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-26 22:24:03,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:24:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-26 22:24:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-26 22:24:03,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:03,026 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:03,026 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:03,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-10-26 22:24:03,026 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:03,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:03,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:03,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:03,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:03,977 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 [2018-10-26 22:24:03,984 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:24:18,334 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-26 22:24:18,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:18,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:18,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:18,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-26 22:24:18,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:24:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:24:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:24:18,484 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-26 22:24:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:18,890 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-26 22:24:18,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:24:18,890 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-26 22:24:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:18,892 INFO L225 Difference]: With dead ends: 139 [2018-10-26 22:24:18,892 INFO L226 Difference]: Without dead ends: 135 [2018-10-26 22:24:18,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:24:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-26 22:24:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-26 22:24:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-26 22:24:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-26 22:24:18,897 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-26 22:24:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:18,897 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-26 22:24:18,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:24:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-26 22:24:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-26 22:24:18,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:18,898 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:18,899 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:18,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-10-26 22:24:18,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:18,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:18,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:18,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:18,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:19,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:19,753 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 [2018-10-26 22:24:19,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:24:56,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-26 22:24:56,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:56,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:56,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:56,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-26 22:24:56,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:24:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:24:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:24:56,746 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-26 22:24:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:57,439 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-26 22:24:57,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 22:24:57,439 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-26 22:24:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:57,441 INFO L225 Difference]: With dead ends: 142 [2018-10-26 22:24:57,441 INFO L226 Difference]: Without dead ends: 138 [2018-10-26 22:24:57,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:24:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-26 22:24:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-26 22:24:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-26 22:24:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-26 22:24:57,445 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-26 22:24:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:57,445 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-26 22:24:57,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:24:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-26 22:24:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-26 22:24:57,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:57,446 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:57,446 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:57,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-10-26 22:24:57,447 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:57,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:57,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:58,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:58,334 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 [2018-10-26 22:24:58,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:58,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:58,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:58,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-26 22:24:58,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 22:24:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 22:24:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:24:58,598 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-26 22:24:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:58,817 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-26 22:24:58,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 22:24:58,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-26 22:24:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:58,819 INFO L225 Difference]: With dead ends: 145 [2018-10-26 22:24:58,819 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 22:24:58,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:24:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 22:24:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-26 22:24:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-26 22:24:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-26 22:24:58,825 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-26 22:24:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:58,825 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-26 22:24:58,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 22:24:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-26 22:24:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 22:24:58,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:58,826 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:58,826 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:58,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-10-26 22:24:58,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:58,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:58,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:58,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:58,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:00,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:00,407 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 [2018-10-26 22:25:00,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:25:00,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:25:00,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:00,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:00,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:00,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-26 22:25:00,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:25:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:25:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:25:00,652 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-26 22:25:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:00,842 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-26 22:25:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:25:00,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-26 22:25:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:00,844 INFO L225 Difference]: With dead ends: 148 [2018-10-26 22:25:00,844 INFO L226 Difference]: Without dead ends: 144 [2018-10-26 22:25:00,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:25:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-26 22:25:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-26 22:25:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-26 22:25:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-26 22:25:00,849 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-26 22:25:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:00,849 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-26 22:25:00,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:25:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-26 22:25:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-26 22:25:00,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:00,850 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:00,851 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:00,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-10-26 22:25:00,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:00,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:00,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:00,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:01,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:01,775 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 [2018-10-26 22:25:01,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:25:36,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-26 22:25:36,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:36,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:36,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:36,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-10-26 22:25:36,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:25:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:25:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:25:36,248 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-26 22:25:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:36,431 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-26 22:25:36,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 22:25:36,431 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-26 22:25:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:36,433 INFO L225 Difference]: With dead ends: 151 [2018-10-26 22:25:36,433 INFO L226 Difference]: Without dead ends: 147 [2018-10-26 22:25:36,434 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 [2018-10-26 22:25:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-26 22:25:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-26 22:25:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-26 22:25:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-26 22:25:36,437 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-26 22:25:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:36,438 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-26 22:25:36,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:25:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-26 22:25:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-26 22:25:36,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:36,439 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:36,439 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:36,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-10-26 22:25:36,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:36,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:36,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:37,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:37,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:25:37,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:25:37,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:25:37,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:37,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:37,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:37,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-26 22:25:37,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 22:25:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 22:25:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:25:37,669 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-26 22:25:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:37,978 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-26 22:25:37,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 22:25:37,979 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-26 22:25:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:37,980 INFO L225 Difference]: With dead ends: 154 [2018-10-26 22:25:37,980 INFO L226 Difference]: Without dead ends: 150 [2018-10-26 22:25:37,981 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 [2018-10-26 22:25:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-26 22:25:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-26 22:25:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-26 22:25:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-26 22:25:37,984 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-26 22:25:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:37,985 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-26 22:25:37,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 22:25:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-26 22:25:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-26 22:25:37,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:37,986 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:37,986 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:37,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-10-26 22:25:37,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:37,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:37,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:39,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:39,079 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 [2018-10-26 22:25:39,086 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:25:51,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-26 22:25:51,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:51,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:52,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:52,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-10-26 22:25:52,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 22:25:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 22:25:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:25:52,023 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-26 22:25:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:52,276 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-26 22:25:52,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 22:25:52,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-26 22:25:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:52,278 INFO L225 Difference]: With dead ends: 157 [2018-10-26 22:25:52,278 INFO L226 Difference]: Without dead ends: 153 [2018-10-26 22:25:52,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:25:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-26 22:25:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-26 22:25:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-26 22:25:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-26 22:25:52,282 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-26 22:25:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:52,282 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-26 22:25:52,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 22:25:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-26 22:25:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-26 22:25:52,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:52,283 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:52,283 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:52,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-10-26 22:25:52,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:52,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:52,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:52,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:52,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:53,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:53,321 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 [2018-10-26 22:25:53,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:26:40,790 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-26 22:26:40,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:26:40,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:40,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:40,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-26 22:26:40,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:26:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:26:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:26:40,890 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 52 states. [2018-10-26 22:26:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:41,062 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-26 22:26:41,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:26:41,063 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2018-10-26 22:26:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:41,064 INFO L225 Difference]: With dead ends: 160 [2018-10-26 22:26:41,064 INFO L226 Difference]: Without dead ends: 156 [2018-10-26 22:26:41,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:26:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-26 22:26:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-26 22:26:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-26 22:26:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-26 22:26:41,069 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-26 22:26:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:41,069 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-26 22:26:41,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:26:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-26 22:26:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-26 22:26:41,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:41,070 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:41,070 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:41,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1964450443, now seen corresponding path program 49 times [2018-10-26 22:26:41,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:41,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:41,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:41,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:26:41,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:42,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:42,210 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:42,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:26:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:42,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:42,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:42,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-10-26 22:26:42,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 22:26:42,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 22:26:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:26:42,383 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 53 states. [2018-10-26 22:26:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:42,582 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-26 22:26:42,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:26:42,583 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-26 22:26:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:42,584 INFO L225 Difference]: With dead ends: 163 [2018-10-26 22:26:42,584 INFO L226 Difference]: Without dead ends: 159 [2018-10-26 22:26:42,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:26:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-26 22:26:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-26 22:26:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-26 22:26:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-26 22:26:42,587 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-26 22:26:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:42,587 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-26 22:26:42,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 22:26:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-26 22:26:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-26 22:26:42,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:42,589 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:42,589 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:42,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1365963277, now seen corresponding path program 50 times [2018-10-26 22:26:42,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:42,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:42,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:26:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:43,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:43,897 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:43,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:26:44,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:26:44,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:26:44,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:44,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:44,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-26 22:26:44,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-26 22:26:44,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-26 22:26:44,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:26:44,073 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 54 states. [2018-10-26 22:26:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:44,300 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-26 22:26:44,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 22:26:44,300 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2018-10-26 22:26:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:44,302 INFO L225 Difference]: With dead ends: 166 [2018-10-26 22:26:44,302 INFO L226 Difference]: Without dead ends: 162 [2018-10-26 22:26:44,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:26:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-26 22:26:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-26 22:26:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-26 22:26:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-26 22:26:44,307 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-26 22:26:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:44,308 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-26 22:26:44,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-26 22:26:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-26 22:26:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 22:26:44,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:44,309 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:44,309 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:44,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 244046667, now seen corresponding path program 51 times [2018-10-26 22:26:44,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:44,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:44,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:26:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:45,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:45,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:45,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown