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-new/count_by_k_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:40:20,979 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:40:20,982 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:40:20,994 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:40:20,994 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:40:20,995 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:40:20,997 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:40:20,998 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:40:21,000 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:40:21,001 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:40:21,002 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:40:21,003 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:40:21,004 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:40:21,005 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:40:21,006 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:40:21,007 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:40:21,008 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:40:21,010 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:40:21,012 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:40:21,017 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:40:21,018 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:40:21,019 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:40:21,022 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:40:21,031 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 09:40:21,055 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:40:21,055 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:40:21,059 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:40:21,059 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:40:21,060 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:40:21,060 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:40:21,060 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:40:21,061 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:40:21,061 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:40:21,061 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:40:21,061 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:40:21,062 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:40:21,062 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:40:21,063 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:40:21,063 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:40:21,063 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:40:21,063 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:40:21,063 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:40:21,064 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:40:21,064 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:40:21,064 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:40:21,064 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:40:21,064 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:40:21,065 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:40:21,065 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:40:21,065 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:40:21,065 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:40:21,066 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:40:21,127 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:40:21,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:40:21,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:40:21,150 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:40:21,151 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:40:21,152 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-23 09:40:21,211 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4127ff172/1905832bf1f14e1da6a661bb06d192c2/FLAG2dc807f9d [2018-10-23 09:40:21,684 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:40:21,684 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-23 09:40:21,691 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4127ff172/1905832bf1f14e1da6a661bb06d192c2/FLAG2dc807f9d [2018-10-23 09:40:21,707 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4127ff172/1905832bf1f14e1da6a661bb06d192c2 [2018-10-23 09:40:21,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:40:21,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:40:21,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:21,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:40:21,727 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:40:21,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:21,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21, skipping insertion in model container [2018-10-23 09:40:21,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:21,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:40:21,762 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:40:21,938 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:21,943 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:40:21,960 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:21,978 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:40:21,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21 WrapperNode [2018-10-23 09:40:21,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:21,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:21,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:40:21,981 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:40:21,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:22,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:40:22,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:40:22,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:40:22,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... [2018-10-23 09:40:22,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:40:22,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:40:22,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:40:22,048 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:40:22,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:40:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:40:22,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:40:22,384 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:40:22,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:22 BoogieIcfgContainer [2018-10-23 09:40:22,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:40:22,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:40:22,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:40:22,390 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:40:22,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:40:21" (1/3) ... [2018-10-23 09:40:22,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c91243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:22, skipping insertion in model container [2018-10-23 09:40:22,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:21" (2/3) ... [2018-10-23 09:40:22,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c91243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:22, skipping insertion in model container [2018-10-23 09:40:22,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:22" (3/3) ... [2018-10-23 09:40:22,394 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i [2018-10-23 09:40:22,404 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:40:22,413 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:40:22,431 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:40:22,464 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:40:22,465 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:40:22,465 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:40:22,466 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:40:22,466 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:40:22,466 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:40:22,466 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:40:22,466 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:40:22,467 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:40:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-23 09:40:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 09:40:22,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:22,490 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:22,492 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:22,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1807151048, now seen corresponding path program 1 times [2018-10-23 09:40:22,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:22,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:22,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:22,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:22,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:22,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 09:40:22,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 09:40:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 09:40:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:40:22,648 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-23 09:40:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:22,666 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-23 09:40:22,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 09:40:22,667 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-23 09:40:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:22,678 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:40:22,678 INFO L226 Difference]: Without dead ends: 10 [2018-10-23 09:40:22,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:40:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-23 09:40:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-23 09:40:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-23 09:40:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-23 09:40:22,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-23 09:40:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:22,725 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-23 09:40:22,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 09:40:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-23 09:40:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-23 09:40:22,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:22,727 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:22,727 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:22,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:22,728 INFO L82 PathProgramCache]: Analyzing trace with hash 178554705, now seen corresponding path program 1 times [2018-10-23 09:40:22,728 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:22,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:22,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:22,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:22,916 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-23 09:40:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:23,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:23,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 09:40:23,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 09:40:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 09:40:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 09:40:23,055 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2018-10-23 09:40:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:23,185 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-23 09:40:23,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 09:40:23,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-23 09:40:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:23,187 INFO L225 Difference]: With dead ends: 16 [2018-10-23 09:40:23,187 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 09:40:23,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:40:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 09:40:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-23 09:40:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-23 09:40:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-23 09:40:23,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-10-23 09:40:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:23,193 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-23 09:40:23,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 09:40:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-23 09:40:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 09:40:23,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:23,195 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:23,196 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:23,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:23,198 INFO L82 PathProgramCache]: Analyzing trace with hash -494066964, now seen corresponding path program 1 times [2018-10-23 09:40:23,198 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:23,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:23,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:23,296 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:23,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:23,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:23,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:23,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-23 09:40:23,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:40:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:40:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:40:23,551 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-10-23 09:40:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:23,817 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-23 09:40:23,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 09:40:23,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-23 09:40:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:23,819 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:40:23,819 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:40:23,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:40:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:40:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-23 09:40:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-23 09:40:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-23 09:40:23,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2018-10-23 09:40:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:23,825 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-23 09:40:23,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:40:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-23 09:40:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 09:40:23,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:23,826 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:23,826 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:23,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash 211590033, now seen corresponding path program 2 times [2018-10-23 09:40:23,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:23,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:24,005 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:24,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:24,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:24,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:24,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:24,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-10-23 09:40:24,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 09:40:24,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 09:40:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:40:24,268 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-10-23 09:40:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:24,887 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-23 09:40:24,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 09:40:24,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-23 09:40:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:24,889 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:40:24,889 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 09:40:24,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:40:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 09:40:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-23 09:40:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-23 09:40:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-23 09:40:24,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2018-10-23 09:40:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:24,897 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-23 09:40:24,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 09:40:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-23 09:40:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 09:40:24,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:24,898 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:24,899 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:24,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1547039604, now seen corresponding path program 3 times [2018-10-23 09:40:24,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:24,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:24,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:24,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:25,140 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:25,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:25,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-23 09:40:25,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:25,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:25,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2018-10-23 09:40:25,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:40:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:40:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:40:25,324 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 13 states. [2018-10-23 09:40:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:25,819 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-23 09:40:25,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 09:40:25,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-10-23 09:40:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:25,822 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:40:25,822 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:40:25,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:40:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-23 09:40:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-23 09:40:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-23 09:40:25,831 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 29 [2018-10-23 09:40:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:25,832 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-23 09:40:25,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:40:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-23 09:40:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 09:40:25,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:25,833 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:25,834 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:25,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512113, now seen corresponding path program 4 times [2018-10-23 09:40:25,834 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:25,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:25,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:25,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:26,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:26,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:26,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:26,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:26,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:26,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-23 09:40:26,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:40:26,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:40:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:26,726 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-10-23 09:40:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:27,551 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-23 09:40:27,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:40:27,556 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-23 09:40:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:27,557 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:40:27,557 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:40:27,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:40:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:40:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-23 09:40:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 09:40:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-23 09:40:27,565 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2018-10-23 09:40:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-23 09:40:27,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:40:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-23 09:40:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 09:40:27,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:27,568 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:27,568 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:27,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1417949652, now seen corresponding path program 5 times [2018-10-23 09:40:27,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:27,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:27,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:28,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:28,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:28,515 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:28,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-23 09:40:28,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:28,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:28,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:28,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-10-23 09:40:28,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:40:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:40:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:40:28,679 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-10-23 09:40:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:29,567 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-23 09:40:29,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:40:29,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-10-23 09:40:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:29,569 INFO L225 Difference]: With dead ends: 61 [2018-10-23 09:40:29,570 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 09:40:29,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 09:40:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-23 09:40:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-23 09:40:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-23 09:40:29,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 47 [2018-10-23 09:40:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:29,581 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-23 09:40:29,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:40:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-23 09:40:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-23 09:40:29,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:29,583 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:29,583 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:29,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1873110959, now seen corresponding path program 6 times [2018-10-23 09:40:29,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:29,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:29,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:29,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:29,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:29,981 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:29,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:30,054 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-23 09:40:30,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:30,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:30,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:30,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-10-23 09:40:30,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:40:30,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:40:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:30,178 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 22 states. [2018-10-23 09:40:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:31,276 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-10-23 09:40:31,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:40:31,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2018-10-23 09:40:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:31,278 INFO L225 Difference]: With dead ends: 70 [2018-10-23 09:40:31,278 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 09:40:31,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 09:40:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-23 09:40:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-23 09:40:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-23 09:40:31,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 56 [2018-10-23 09:40:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:31,288 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-23 09:40:31,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:40:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-23 09:40:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-23 09:40:31,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:31,289 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:31,289 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:31,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181556, now seen corresponding path program 7 times [2018-10-23 09:40:31,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:31,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:31,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:31,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:31,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:31,983 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:31,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:32,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:32,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:32,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2018-10-23 09:40:32,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:40:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:40:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:32,145 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 25 states. [2018-10-23 09:40:32,430 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 8 [2018-10-23 09:40:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:33,397 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-23 09:40:33,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 09:40:33,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2018-10-23 09:40:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:33,400 INFO L225 Difference]: With dead ends: 79 [2018-10-23 09:40:33,400 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 09:40:33,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:40:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 09:40:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-23 09:40:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-23 09:40:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-23 09:40:33,410 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 65 [2018-10-23 09:40:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:33,410 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-23 09:40:33,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:40:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-23 09:40:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-23 09:40:33,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:33,412 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:33,412 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:33,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1530712753, now seen corresponding path program 8 times [2018-10-23 09:40:33,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:33,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:33,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:33,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:33,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:33,876 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:33,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:33,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:33,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:33,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:34,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:34,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2018-10-23 09:40:34,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:40:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:40:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:34,379 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 28 states. [2018-10-23 09:40:34,744 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 8 [2018-10-23 09:40:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:36,185 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-10-23 09:40:36,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:40:36,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2018-10-23 09:40:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:36,187 INFO L225 Difference]: With dead ends: 88 [2018-10-23 09:40:36,187 INFO L226 Difference]: Without dead ends: 84 [2018-10-23 09:40:36,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=705, Invalid=1947, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:40:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-23 09:40:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-23 09:40:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-23 09:40:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-23 09:40:36,198 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 74 [2018-10-23 09:40:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:36,198 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-23 09:40:36,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:40:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-23 09:40:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-23 09:40:36,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:36,200 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:36,200 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:36,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 430299500, now seen corresponding path program 9 times [2018-10-23 09:40:36,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:36,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:36,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:36,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:36,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:36,994 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:37,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:37,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-23 09:40:37,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:37,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:37,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:37,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-10-23 09:40:37,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:40:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:40:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:40:37,234 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 31 states. [2018-10-23 09:40:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:38,989 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-10-23 09:40:38,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 09:40:38,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2018-10-23 09:40:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:38,991 INFO L225 Difference]: With dead ends: 97 [2018-10-23 09:40:38,992 INFO L226 Difference]: Without dead ends: 93 [2018-10-23 09:40:38,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:40:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-23 09:40:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-23 09:40:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-23 09:40:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-23 09:40:39,003 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 83 [2018-10-23 09:40:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:39,003 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-23 09:40:39,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:40:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-23 09:40:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-23 09:40:39,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:39,005 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:39,006 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:39,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1414974191, now seen corresponding path program 10 times [2018-10-23 09:40:39,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:39,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:39,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:39,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:39,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:39,966 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:39,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:40,029 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:40,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:40,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:40,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:40,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2018-10-23 09:40:40,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 09:40:40,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 09:40:40,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:40,205 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 34 states. [2018-10-23 09:40:40,481 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 8 [2018-10-23 09:40:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:42,964 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2018-10-23 09:40:42,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:40:42,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2018-10-23 09:40:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:42,966 INFO L225 Difference]: With dead ends: 106 [2018-10-23 09:40:42,967 INFO L226 Difference]: Without dead ends: 102 [2018-10-23 09:40:42,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:40:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-23 09:40:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-23 09:40:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-23 09:40:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-23 09:40:42,978 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 92 [2018-10-23 09:40:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:42,978 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-23 09:40:42,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 09:40:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-23 09:40:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-23 09:40:42,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:42,980 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:42,981 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:42,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash 999432972, now seen corresponding path program 11 times [2018-10-23 09:40:42,981 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:42,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:42,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:42,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:42,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:43,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:43,752 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:43,760 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:43,830 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-23 09:40:43,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:43,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:44,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:44,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2018-10-23 09:40:44,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:40:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:40:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:44,049 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 37 states. [2018-10-23 09:40:45,289 WARN L179 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2018-10-23 09:40:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:47,476 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-23 09:40:47,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:40:47,477 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2018-10-23 09:40:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:47,478 INFO L225 Difference]: With dead ends: 115 [2018-10-23 09:40:47,478 INFO L226 Difference]: Without dead ends: 111 [2018-10-23 09:40:47,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1263, Invalid=3567, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:40:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-23 09:40:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-23 09:40:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-23 09:40:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-23 09:40:47,489 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2018-10-23 09:40:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:47,490 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-23 09:40:47,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:40:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-23 09:40:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-23 09:40:47,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:47,492 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:47,492 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:47,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1838825615, now seen corresponding path program 12 times [2018-10-23 09:40:47,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:47,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:47,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:47,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:48,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:48,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:48,375 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:48,408 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-23 09:40:48,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:48,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:48,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:48,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2018-10-23 09:40:48,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:40:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:40:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:48,658 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2018-10-23 09:40:49,055 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2018-10-23 09:40:49,359 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 11 [2018-10-23 09:40:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:51,858 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-23 09:40:51,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:40:51,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2018-10-23 09:40:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:51,861 INFO L225 Difference]: With dead ends: 124 [2018-10-23 09:40:51,861 INFO L226 Difference]: Without dead ends: 120 [2018-10-23 09:40:51,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1485, Invalid=4215, Unknown=0, NotChecked=0, Total=5700 [2018-10-23 09:40:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-23 09:40:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-23 09:40:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-23 09:40:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-23 09:40:51,873 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 110 [2018-10-23 09:40:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:51,874 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-23 09:40:51,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:40:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-23 09:40:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-23 09:40:51,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:51,877 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:51,877 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:51,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1524319404, now seen corresponding path program 13 times [2018-10-23 09:40:51,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:51,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:51,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:51,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:52,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:52,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:52,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:52,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:53,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:53,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-10-23 09:40:53,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:40:53,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:40:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:40:53,124 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 43 states. [2018-10-23 09:40:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:56,893 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2018-10-23 09:40:56,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:40:56,893 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 119 [2018-10-23 09:40:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:56,895 INFO L225 Difference]: With dead ends: 133 [2018-10-23 09:40:56,895 INFO L226 Difference]: Without dead ends: 129 [2018-10-23 09:40:56,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1725, Invalid=4917, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:40:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-23 09:40:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-23 09:40:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-23 09:40:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-23 09:40:56,904 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 119 [2018-10-23 09:40:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:56,904 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-23 09:40:56,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:40:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-23 09:40:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-23 09:40:56,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:56,906 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:56,907 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:56,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1162317359, now seen corresponding path program 14 times [2018-10-23 09:40:56,907 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:56,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:56,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:56,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:58,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:58,843 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:58,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:58,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:58,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:59,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:59,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:59,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2018-10-23 09:40:59,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:40:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:40:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:40:59,209 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 46 states. [2018-10-23 09:41:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:03,751 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-10-23 09:41:03,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:41:03,753 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 128 [2018-10-23 09:41:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:03,754 INFO L225 Difference]: With dead ends: 142 [2018-10-23 09:41:03,754 INFO L226 Difference]: Without dead ends: 138 [2018-10-23 09:41:03,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1983, Invalid=5673, Unknown=0, NotChecked=0, Total=7656 [2018-10-23 09:41:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-23 09:41:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-23 09:41:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-23 09:41:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-23 09:41:03,764 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 128 [2018-10-23 09:41:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:03,765 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-23 09:41:03,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:41:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-23 09:41:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-23 09:41:03,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:03,766 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:03,767 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:03,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 452673100, now seen corresponding path program 15 times [2018-10-23 09:41:03,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:03,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:03,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:03,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:05,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:05,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:05,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:05,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-23 09:41:05,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:05,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:05,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:05,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2018-10-23 09:41:05,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:41:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:41:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:41:05,682 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 49 states. [2018-10-23 09:41:06,143 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-23 09:41:06,283 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-23 09:41:06,417 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-10-23 09:41:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:10,857 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-23 09:41:10,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 09:41:10,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 137 [2018-10-23 09:41:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:10,862 INFO L225 Difference]: With dead ends: 151 [2018-10-23 09:41:10,862 INFO L226 Difference]: Without dead ends: 147 [2018-10-23 09:41:10,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2259, Invalid=6483, Unknown=0, NotChecked=0, Total=8742 [2018-10-23 09:41:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-23 09:41:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-23 09:41:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-23 09:41:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-23 09:41:10,871 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 137 [2018-10-23 09:41:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:10,872 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-23 09:41:10,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:41:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-23 09:41:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-23 09:41:10,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:10,873 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:10,873 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:10,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -899199951, now seen corresponding path program 16 times [2018-10-23 09:41:10,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:10,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:10,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:10,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:12,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:12,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:12,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:12,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:12,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:12,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:12,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:12,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2018-10-23 09:41:12,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:41:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:41:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:12,526 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 52 states. [2018-10-23 09:41:12,891 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-23 09:41:13,017 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:41:13,269 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-23 09:41:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:18,433 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2018-10-23 09:41:18,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:41:18,441 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 146 [2018-10-23 09:41:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:18,442 INFO L225 Difference]: With dead ends: 160 [2018-10-23 09:41:18,442 INFO L226 Difference]: Without dead ends: 156 [2018-10-23 09:41:18,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2553, Invalid=7347, Unknown=0, NotChecked=0, Total=9900 [2018-10-23 09:41:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-23 09:41:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-23 09:41:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-23 09:41:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-23 09:41:18,450 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 146 [2018-10-23 09:41:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:18,450 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-23 09:41:18,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:41:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-23 09:41:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-23 09:41:18,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:18,451 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:18,452 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:18,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -185856020, now seen corresponding path program 17 times [2018-10-23 09:41:18,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:18,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:18,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:18,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:18,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:19,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:19,945 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:19,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:20,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-10-23 09:41:20,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:20,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:20,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:20,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2018-10-23 09:41:20,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-23 09:41:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-23 09:41:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2858, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:41:20,490 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 55 states. [2018-10-23 09:41:20,768 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2018-10-23 09:41:20,888 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2018-10-23 09:41:21,010 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:41:21,143 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:41:21,409 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:41:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:27,170 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2018-10-23 09:41:27,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-23 09:41:27,171 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 155 [2018-10-23 09:41:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:27,173 INFO L225 Difference]: With dead ends: 169 [2018-10-23 09:41:27,173 INFO L226 Difference]: Without dead ends: 165 [2018-10-23 09:41:27,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2865, Invalid=8265, Unknown=0, NotChecked=0, Total=11130 [2018-10-23 09:41:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-23 09:41:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-23 09:41:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-23 09:41:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-23 09:41:27,180 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 155 [2018-10-23 09:41:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:27,181 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-23 09:41:27,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-23 09:41:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-23 09:41:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-23 09:41:27,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:27,182 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:27,182 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:27,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1044885871, now seen corresponding path program 18 times [2018-10-23 09:41:27,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:27,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:27,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:27,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:28,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:28,912 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:28,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:28,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-10-23 09:41:28,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:28,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:29,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:29,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2018-10-23 09:41:29,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-23 09:41:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-23 09:41:29,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:41:29,211 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 58 states. [2018-10-23 09:41:29,383 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2018-10-23 09:41:29,510 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-23 09:41:29,638 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-23 09:41:29,776 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:41:29,919 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:41:30,055 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:41:30,197 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:41:30,360 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:41:30,524 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:41:30,692 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:41:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:37,032 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-23 09:41:37,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-23 09:41:37,033 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 164 [2018-10-23 09:41:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:37,034 INFO L225 Difference]: With dead ends: 178 [2018-10-23 09:41:37,034 INFO L226 Difference]: Without dead ends: 174 [2018-10-23 09:41:37,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3195, Invalid=9237, Unknown=0, NotChecked=0, Total=12432 [2018-10-23 09:41:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-23 09:41:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-23 09:41:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-23 09:41:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-23 09:41:37,043 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2018-10-23 09:41:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:37,044 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-23 09:41:37,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-23 09:41:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-23 09:41:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-23 09:41:37,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:37,045 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:37,045 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:37,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash -685262452, now seen corresponding path program 19 times [2018-10-23 09:41:37,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:37,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:38,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:38,879 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:38,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:39,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:39,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:39,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2018-10-23 09:41:39,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-23 09:41:39,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-23 09:41:39,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3536, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:41:39,526 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 61 states. [2018-10-23 09:41:39,723 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-23 09:41:39,854 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2018-10-23 09:41:39,993 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2018-10-23 09:41:40,136 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:41:40,288 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:41:40,439 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:41:40,620 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:41:40,822 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:41:40,987 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:41:41,149 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:41:41,315 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:41:41,492 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:41:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:48,454 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-23 09:41:48,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-23 09:41:48,455 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 173 [2018-10-23 09:41:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:48,456 INFO L225 Difference]: With dead ends: 187 [2018-10-23 09:41:48,457 INFO L226 Difference]: Without dead ends: 183 [2018-10-23 09:41:48,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3543, Invalid=10263, Unknown=0, NotChecked=0, Total=13806 [2018-10-23 09:41:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-23 09:41:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-23 09:41:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-23 09:41:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-23 09:41:48,466 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 173 [2018-10-23 09:41:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:48,466 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-23 09:41:48,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-23 09:41:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-23 09:41:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-23 09:41:48,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:48,468 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:48,468 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:48,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1534163185, now seen corresponding path program 20 times [2018-10-23 09:41:48,468 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:48,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:48,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:48,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:48,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:50,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:50,491 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:50,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:50,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:50,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:50,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:51,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:51,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2018-10-23 09:41:51,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-23 09:41:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-23 09:41:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:41:51,310 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 64 states. [2018-10-23 09:41:51,507 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2018-10-23 09:41:51,651 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-23 09:41:51,805 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-23 09:41:51,967 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:41:52,135 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:41:52,298 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:41:52,464 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:41:52,650 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:41:52,820 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:41:52,992 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:41:53,182 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:41:53,363 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:41:53,549 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:41:53,736 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:41:54,117 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:42:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:01,564 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-10-23 09:42:01,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-23 09:42:01,567 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 182 [2018-10-23 09:42:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:01,568 INFO L225 Difference]: With dead ends: 196 [2018-10-23 09:42:01,569 INFO L226 Difference]: Without dead ends: 192 [2018-10-23 09:42:01,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3909, Invalid=11343, Unknown=0, NotChecked=0, Total=15252 [2018-10-23 09:42:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-23 09:42:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-23 09:42:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-23 09:42:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-10-23 09:42:01,577 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 182 [2018-10-23 09:42:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:01,578 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-10-23 09:42:01,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-23 09:42:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-10-23 09:42:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-23 09:42:01,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:01,579 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:01,579 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:01,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -978830548, now seen corresponding path program 21 times [2018-10-23 09:42:01,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:01,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:01,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:01,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:03,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:03,955 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:03,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:04,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-10-23 09:42:04,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:04,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:04,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:04,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2018-10-23 09:42:04,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-23 09:42:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-23 09:42:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4286, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:42:04,305 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 67 states. [2018-10-23 09:42:04,517 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-23 09:42:04,674 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2018-10-23 09:42:04,842 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2018-10-23 09:42:05,009 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:42:05,187 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:42:05,360 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:42:05,542 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:42:05,726 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:42:05,909 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:42:06,097 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:42:06,316 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:42:06,528 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:42:06,732 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:42:06,931 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:42:07,133 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:42:07,337 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:42:07,538 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:42:07,753 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:42:14,544 WARN L179 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2018-10-23 09:42:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:17,279 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2018-10-23 09:42:17,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-23 09:42:17,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 191 [2018-10-23 09:42:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:17,282 INFO L225 Difference]: With dead ends: 205 [2018-10-23 09:42:17,282 INFO L226 Difference]: Without dead ends: 201 [2018-10-23 09:42:17,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4293, Invalid=12477, Unknown=0, NotChecked=0, Total=16770 [2018-10-23 09:42:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-23 09:42:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-23 09:42:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-23 09:42:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-23 09:42:17,290 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 191 [2018-10-23 09:42:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:17,290 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-23 09:42:17,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-23 09:42:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-23 09:42:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-23 09:42:17,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:17,291 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:17,292 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:17,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1826147153, now seen corresponding path program 22 times [2018-10-23 09:42:17,292 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:17,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:17,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:17,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:19,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:19,743 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:19,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:20,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:20,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:20,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:20,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:20,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-10-23 09:42:20,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-23 09:42:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-23 09:42:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:42:20,397 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 70 states. [2018-10-23 09:42:20,628 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2018-10-23 09:42:20,799 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-23 09:42:20,979 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-23 09:42:21,161 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:42:21,351 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:42:21,534 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:42:21,761 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:42:21,982 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:42:22,179 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:42:22,366 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:42:22,570 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:42:22,779 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:42:22,999 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:42:23,210 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:42:23,428 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:42:23,645 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:42:23,867 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:42:24,084 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:42:24,300 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:42:24,518 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:42:24,745 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:42:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:33,145 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-10-23 09:42:33,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-23 09:42:33,145 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 200 [2018-10-23 09:42:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:33,147 INFO L225 Difference]: With dead ends: 214 [2018-10-23 09:42:33,147 INFO L226 Difference]: Without dead ends: 210 [2018-10-23 09:42:33,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4695, Invalid=13665, Unknown=0, NotChecked=0, Total=18360 [2018-10-23 09:42:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-23 09:42:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-23 09:42:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-23 09:42:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-10-23 09:42:33,156 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 200 [2018-10-23 09:42:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:33,156 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-10-23 09:42:33,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-23 09:42:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-10-23 09:42:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-23 09:42:33,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:33,158 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:33,158 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:33,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2045220044, now seen corresponding path program 23 times [2018-10-23 09:42:33,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:33,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:33,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:33,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:33,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:36,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:36,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:36,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:36,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-10-23 09:42:36,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:36,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:37,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:37,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2018-10-23 09:42:37,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-23 09:42:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-23 09:42:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5108, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:42:37,541 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 73 states. [2018-10-23 09:42:37,832 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-23 09:42:38,011 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2018-10-23 09:42:38,193 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2018-10-23 09:42:38,389 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-23 09:42:38,588 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-23 09:42:38,792 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-23 09:42:38,999 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:42:39,216 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:42:39,433 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:42:39,651 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:42:39,877 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:42:40,099 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:42:40,322 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:42:40,544 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:42:40,772 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:42:41,005 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:42:41,236 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:42:41,472 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:42:41,714 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:42:41,973 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:42:42,242 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:42:42,489 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:42:42,729 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:42:43,228 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:42:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:51,955 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-10-23 09:42:51,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-23 09:42:51,955 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 209 [2018-10-23 09:42:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:51,957 INFO L225 Difference]: With dead ends: 223 [2018-10-23 09:42:51,957 INFO L226 Difference]: Without dead ends: 219 [2018-10-23 09:42:51,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=5115, Invalid=14907, Unknown=0, NotChecked=0, Total=20022 [2018-10-23 09:42:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-23 09:42:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-23 09:42:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-23 09:42:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-23 09:42:51,967 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 209 [2018-10-23 09:42:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:51,968 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-23 09:42:51,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-23 09:42:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-23 09:42:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-23 09:42:51,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:51,969 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:51,969 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:51,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1169442225, now seen corresponding path program 24 times [2018-10-23 09:42:51,970 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:51,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:51,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:51,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:51,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:55,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:55,076 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:55,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:55,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-10-23 09:42:55,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:55,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:55,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:55,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-10-23 09:42:55,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-23 09:42:55,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-23 09:42:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2018-10-23 09:42:55,542 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 76 states. [2018-10-23 09:42:55,874 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2018-10-23 09:42:56,074 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-23 09:42:56,271 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-23 09:42:56,474 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-23 09:42:56,690 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-23 09:42:56,906 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-23 09:42:57,129 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-23 09:42:57,367 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-23 09:42:57,634 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-23 09:42:57,872 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:42:58,113 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:42:58,365 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:42:58,609 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:42:58,856 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:42:59,115 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:42:59,366 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:42:59,629 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:42:59,888 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:43:00,147 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:43:00,411 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:43:00,668 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:43:00,922 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:43:01,183 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:43:01,440 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:43:01,706 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:43:01,978 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:43:02,239 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:43:02,531 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-23 09:43:02,823 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-23 09:43:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:11,651 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-10-23 09:43:11,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-23 09:43:11,651 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 218 [2018-10-23 09:43:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:11,653 INFO L225 Difference]: With dead ends: 232 [2018-10-23 09:43:11,653 INFO L226 Difference]: Without dead ends: 228 [2018-10-23 09:43:11,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=5553, Invalid=16203, Unknown=0, NotChecked=0, Total=21756 [2018-10-23 09:43:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-23 09:43:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-23 09:43:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-23 09:43:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-10-23 09:43:11,663 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 218 [2018-10-23 09:43:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:11,663 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-10-23 09:43:11,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-23 09:43:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-10-23 09:43:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-23 09:43:11,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:11,665 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:11,665 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:11,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash 48219756, now seen corresponding path program 25 times [2018-10-23 09:43:11,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:11,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:11,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:11,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:15,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:15,080 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:15,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:15,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:16,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:16,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2018-10-23 09:43:16,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-23 09:43:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-23 09:43:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6002, Unknown=0, NotChecked=0, Total=6162 [2018-10-23 09:43:16,376 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 79 states. [2018-10-23 09:43:16,655 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-23 09:43:16,866 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 8 [2018-10-23 09:43:17,075 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2018-10-23 09:43:17,295 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-23 09:43:17,525 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-23 09:43:17,754 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-23 09:43:18,021 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-23 09:43:18,280 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-23 09:43:18,522 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-23 09:43:18,766 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-23 09:43:19,028 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-23 09:43:19,286 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-23 09:43:19,548 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:43:19,820 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:43:20,079 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:43:20,334 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:43:20,610 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:43:20,892 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:43:21,170 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:43:21,442 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:43:21,729 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:43:22,000 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:43:22,272 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:43:22,559 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:43:22,820 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:43:23,111 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:43:23,401 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:43:23,691 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:43:23,979 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:43:24,267 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:43:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:34,248 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-23 09:43:34,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-23 09:43:34,249 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 227 [2018-10-23 09:43:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:34,251 INFO L225 Difference]: With dead ends: 241 [2018-10-23 09:43:34,251 INFO L226 Difference]: Without dead ends: 237 [2018-10-23 09:43:34,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=6009, Invalid=17553, Unknown=0, NotChecked=0, Total=23562 [2018-10-23 09:43:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-23 09:43:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-10-23 09:43:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-23 09:43:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-10-23 09:43:34,262 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2018-10-23 09:43:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:34,262 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-10-23 09:43:34,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-23 09:43:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-10-23 09:43:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-23 09:43:34,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:34,264 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:34,264 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:34,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:34,264 INFO L82 PathProgramCache]: Analyzing trace with hash 273278993, now seen corresponding path program 26 times [2018-10-23 09:43:34,265 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:34,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:34,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:34,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:38,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:38,217 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:38,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:39,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:39,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:39,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:39,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:39,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-10-23 09:43:39,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-23 09:43:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-23 09:43:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:43:39,757 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 82 states. [2018-10-23 09:43:40,052 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2018-10-23 09:43:40,273 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-10-23 09:43:40,502 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-23 09:43:40,740 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-23 09:43:40,985 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-23 09:43:41,224 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-23 09:43:41,476 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-23 09:43:41,730 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-23 09:43:41,982 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-23 09:43:42,248 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-23 09:43:42,515 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-23 09:43:42,798 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-23 09:43:43,067 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-23 09:43:43,350 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-23 09:43:43,655 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-23 09:43:43,942 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:43:44,288 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:43:44,580 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:43:44,878 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:43:45,181 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:43:45,481 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:43:45,769 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:43:46,061 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:43:46,357 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:43:46,657 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:43:46,960 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:43:47,252 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:43:47,567 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:43:47,884 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:43:48,176 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:43:48,473 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:43:49,052 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:43:49,364 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:43:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:59,787 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-10-23 09:43:59,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-23 09:43:59,787 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 236 [2018-10-23 09:43:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:59,789 INFO L225 Difference]: With dead ends: 250 [2018-10-23 09:43:59,789 INFO L226 Difference]: Without dead ends: 246 [2018-10-23 09:43:59,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=6483, Invalid=18957, Unknown=0, NotChecked=0, Total=25440 [2018-10-23 09:43:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-23 09:43:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-23 09:43:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-23 09:43:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-10-23 09:43:59,800 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 236 [2018-10-23 09:43:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:59,801 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-10-23 09:43:59,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-23 09:43:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-10-23 09:43:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-23 09:43:59,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:59,802 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:59,802 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:59,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1695207436, now seen corresponding path program 27 times [2018-10-23 09:43:59,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:59,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:59,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:59,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:59,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:04,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:04,159 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:44:04,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:44:04,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2018-10-23 09:44:04,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:04,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:05,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:05,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2018-10-23 09:44:05,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-23 09:44:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-23 09:44:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6968, Unknown=0, NotChecked=0, Total=7140 [2018-10-23 09:44:05,597 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 85 states. [2018-10-23 09:44:05,900 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-10-23 09:44:06,136 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2018-10-23 09:44:06,389 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2018-10-23 09:44:06,643 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-23 09:44:06,905 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-23 09:44:07,159 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-23 09:44:07,426 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-23 09:44:07,703 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-23 09:44:07,981 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-23 09:44:08,265 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-23 09:44:08,549 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-23 09:44:08,836 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-23 09:44:09,142 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-23 09:44:09,451 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-23 09:44:09,765 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-23 09:44:10,064 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-23 09:44:10,369 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-23 09:44:10,684 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-23 09:44:11,003 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-23 09:44:11,309 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-23 09:44:11,622 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-23 09:44:11,942 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-23 09:44:12,277 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-23 09:44:12,588 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-23 09:44:12,896 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-23 09:44:13,225 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-23 09:44:13,562 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-23 09:44:13,892 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-23 09:44:14,219 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-23 09:44:14,554 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-23 09:44:14,880 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-23 09:44:15,218 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-23 09:44:15,555 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-23 09:44:15,889 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-23 09:44:16,246 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-23 09:44:16,583 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-23 09:44:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:27,538 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-10-23 09:44:27,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-23 09:44:27,538 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 245 [2018-10-23 09:44:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:27,540 INFO L225 Difference]: With dead ends: 259 [2018-10-23 09:44:27,540 INFO L226 Difference]: Without dead ends: 255 [2018-10-23 09:44:27,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=6975, Invalid=20415, Unknown=0, NotChecked=0, Total=27390 [2018-10-23 09:44:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-23 09:44:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-23 09:44:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-23 09:44:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-23 09:44:27,551 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 245 [2018-10-23 09:44:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:27,551 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-23 09:44:27,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-23 09:44:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-23 09:44:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-23 09:44:27,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:27,553 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:27,553 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:27,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 828355185, now seen corresponding path program 28 times [2018-10-23 09:44:27,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:27,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:27,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:27,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:27,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-23 09:44:30,973 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 09:44:30,978 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 09:44:30,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:44:30 BoogieIcfgContainer [2018-10-23 09:44:30,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:44:30,979 INFO L168 Benchmark]: Toolchain (without parser) took 249258.98 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 697.8 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -254.9 MB). Peak memory consumption was 443.0 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:30,979 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:44:30,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:30,980 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:44:30,980 INFO L168 Benchmark]: Boogie Preprocessor took 24.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:44:30,981 INFO L168 Benchmark]: RCFGBuilder took 338.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:30,981 INFO L168 Benchmark]: TraceAbstraction took 248591.71 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -51.9 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 534.7 MB). Peak memory consumption was 482.8 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:30,983 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 338.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248591.71 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -51.9 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 534.7 MB). Peak memory consumption was 482.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 255 with TraceHistMax 83,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 56 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 248.5s OverallTime, 30 OverallIterations, 83 TraceHistogramMax, 187.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 273 SDtfs, 4086 SDslu, 4852 SDs, 0 SdLazy, 6340 SolverSat, 2545 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5747 GetRequests, 3424 SyntacticMatches, 0 SemanticMatches, 2323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31773 ImplicationChecksByTransitivity, 219.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=255occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 29 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 46.8s InterpolantComputationTime, 6927 NumberOfCodeBlocks, 6927 NumberOfCodeBlocksAsserted, 612 NumberOfCheckSat, 6871 ConstructedInterpolants, 0 QuantifiedInterpolants, 5566483 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4806 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 0/174906 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown