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/eca-rers2012/Problem17_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:52:36,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:52:36,869 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:52:36,882 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:52:36,883 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:52:36,884 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:52:36,885 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:52:36,887 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:52:36,889 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:52:36,889 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:52:36,890 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:52:36,891 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:52:36,892 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:52:36,893 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:52:36,894 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:52:36,895 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:52:36,896 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:52:36,903 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:52:36,905 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:52:36,909 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:52:36,910 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:52:36,914 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:52:36,921 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:52:36,921 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:52:36,922 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:52:36,922 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:52:36,924 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:52:36,925 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:52:36,928 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:52:36,929 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:52:36,929 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:52:36,930 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:52:36,934 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 [2018-10-24 16:52:36,963 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:52:36,963 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:52:36,964 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:52:36,964 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:52:36,964 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:52:36,965 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:52:36,966 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:52:36,966 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:52:36,966 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:52:36,966 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:52:36,966 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:52:36,967 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:52:36,967 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:52:36,967 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:52:36,967 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:52:36,967 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:52:36,968 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:52:36,969 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:52:36,969 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:52:36,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:52:36,969 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:52:36,969 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:52:36,969 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:52:36,970 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:52:36,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:52:36,970 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:52:36,970 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:52:36,971 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:52:37,037 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:52:37,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:52:37,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:52:37,058 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:52:37,058 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:52:37,059 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label47_true-unreach-call.c [2018-10-24 16:52:37,123 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/189522af6/491ef2a7620d4825a34d80302a8c7812/FLAG150518860 [2018-10-24 16:52:37,856 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:52:37,857 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label47_true-unreach-call.c [2018-10-24 16:52:37,884 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/189522af6/491ef2a7620d4825a34d80302a8c7812/FLAG150518860 [2018-10-24 16:52:37,906 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/189522af6/491ef2a7620d4825a34d80302a8c7812 [2018-10-24 16:52:37,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:52:37,920 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:52:37,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:52:37,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:52:37,926 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:52:37,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:52:37" (1/1) ... [2018-10-24 16:52:37,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35da2c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:37, skipping insertion in model container [2018-10-24 16:52:37,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:52:37" (1/1) ... [2018-10-24 16:52:37,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:52:38,069 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:52:39,212 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:52:39,217 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:52:39,583 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:52:39,604 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:52:39,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39 WrapperNode [2018-10-24 16:52:39,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:52:39,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:52:39,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:52:39,607 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:52:39,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:39,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:52:40,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:52:40,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:52:40,137 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:52:40,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (1/1) ... [2018-10-24 16:52:40,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:52:40,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:52:40,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:52:40,396 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:52:40,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (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 [2018-10-24 16:52:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:52:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:52:40,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:52:50,690 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:52:50,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:52:50 BoogieIcfgContainer [2018-10-24 16:52:50,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:52:50,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:52:50,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:52:50,696 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:52:50,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:52:37" (1/3) ... [2018-10-24 16:52:50,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdc43bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:52:50, skipping insertion in model container [2018-10-24 16:52:50,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:52:39" (2/3) ... [2018-10-24 16:52:50,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdc43bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:52:50, skipping insertion in model container [2018-10-24 16:52:50,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:52:50" (3/3) ... [2018-10-24 16:52:50,703 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label47_true-unreach-call.c [2018-10-24 16:52:50,713 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:52:50,725 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:52:50,743 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:52:50,784 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:52:50,785 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:52:50,785 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:52:50,786 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:52:50,786 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:52:50,786 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:52:50,786 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:52:50,786 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:52:50,787 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:52:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:52:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-24 16:52:50,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:50,830 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:52:50,832 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:50,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 147574146, now seen corresponding path program 1 times [2018-10-24 16:52:50,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:50,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:50,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:50,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:50,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:52:51,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:51,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:52:51,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:52:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:52:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:52:51,370 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:53:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:03,066 INFO L93 Difference]: Finished difference Result 2102 states and 3914 transitions. [2018-10-24 16:53:03,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:53:03,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-10-24 16:53:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:03,106 INFO L225 Difference]: With dead ends: 2102 [2018-10-24 16:53:03,107 INFO L226 Difference]: Without dead ends: 1504 [2018-10-24 16:53:03,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:53:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2018-10-24 16:53:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1491. [2018-10-24 16:53:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2018-10-24 16:53:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2416 transitions. [2018-10-24 16:53:03,252 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2416 transitions. Word has length 45 [2018-10-24 16:53:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:03,252 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 2416 transitions. [2018-10-24 16:53:03,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:53:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2416 transitions. [2018-10-24 16:53:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 16:53:03,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:03,258 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:53:03,259 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:03,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -445685495, now seen corresponding path program 1 times [2018-10-24 16:53:03,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:03,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:03,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:53:03,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:53:03,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:53:03,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:53:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:53:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:53:03,527 INFO L87 Difference]: Start difference. First operand 1491 states and 2416 transitions. Second operand 4 states. [2018-10-24 16:53:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:13,803 INFO L93 Difference]: Finished difference Result 4268 states and 6993 transitions. [2018-10-24 16:53:13,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:53:13,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2018-10-24 16:53:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:13,818 INFO L225 Difference]: With dead ends: 4268 [2018-10-24 16:53:13,819 INFO L226 Difference]: Without dead ends: 2779 [2018-10-24 16:53:13,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:53:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2018-10-24 16:53:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2779. [2018-10-24 16:53:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2779 states. [2018-10-24 16:53:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3841 transitions. [2018-10-24 16:53:13,876 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3841 transitions. Word has length 113 [2018-10-24 16:53:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:13,876 INFO L481 AbstractCegarLoop]: Abstraction has 2779 states and 3841 transitions. [2018-10-24 16:53:13,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:53:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3841 transitions. [2018-10-24 16:53:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-24 16:53:13,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:13,881 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:53:13,881 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:13,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1602757590, now seen corresponding path program 1 times [2018-10-24 16:53:13,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:13,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:13,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:13,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:13,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:53:14,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:53:14,148 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 [2018-10-24 16:53:14,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:14,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:53:14,770 WARN L179 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2018-10-24 16:53:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:53:15,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:53:15,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-24 16:53:15,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:53:15,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:53:15,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:53:15,201 INFO L87 Difference]: Start difference. First operand 2779 states and 3841 transitions. Second operand 8 states. [2018-10-24 16:53:27,382 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-24 16:53:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:48,694 INFO L93 Difference]: Finished difference Result 17528 states and 24013 transitions. [2018-10-24 16:53:48,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:53:48,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2018-10-24 16:53:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:48,741 INFO L225 Difference]: With dead ends: 17528 [2018-10-24 16:53:48,741 INFO L226 Difference]: Without dead ends: 9535 [2018-10-24 16:53:48,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:53:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2018-10-24 16:53:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 8676. [2018-10-24 16:53:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8676 states. [2018-10-24 16:53:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 10459 transitions. [2018-10-24 16:53:48,909 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 10459 transitions. Word has length 116 [2018-10-24 16:53:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:48,910 INFO L481 AbstractCegarLoop]: Abstraction has 8676 states and 10459 transitions. [2018-10-24 16:53:48,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:53:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 10459 transitions. [2018-10-24 16:53:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-24 16:53:48,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:48,915 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:53:48,915 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:48,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1967348037, now seen corresponding path program 1 times [2018-10-24 16:53:48,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:48,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:48,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:48,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:48,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-24 16:53:49,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:53:49,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:53:49,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:53:49,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:53:49,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:53:49,159 INFO L87 Difference]: Start difference. First operand 8676 states and 10459 transitions. Second operand 3 states. [2018-10-24 16:53:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:52,124 INFO L93 Difference]: Finished difference Result 21180 states and 25882 transitions. [2018-10-24 16:53:52,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:53:52,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 266 [2018-10-24 16:53:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:52,178 INFO L225 Difference]: With dead ends: 21180 [2018-10-24 16:53:52,178 INFO L226 Difference]: Without dead ends: 12933 [2018-10-24 16:53:52,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:53:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12933 states. [2018-10-24 16:53:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12933 to 12933. [2018-10-24 16:53:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12933 states. [2018-10-24 16:53:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12933 states to 12933 states and 15114 transitions. [2018-10-24 16:53:52,416 INFO L78 Accepts]: Start accepts. Automaton has 12933 states and 15114 transitions. Word has length 266 [2018-10-24 16:53:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:52,416 INFO L481 AbstractCegarLoop]: Abstraction has 12933 states and 15114 transitions. [2018-10-24 16:53:52,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:53:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12933 states and 15114 transitions. [2018-10-24 16:53:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-10-24 16:53:52,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:52,429 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:53:52,431 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:52,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1375808652, now seen corresponding path program 1 times [2018-10-24 16:53:52,431 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:52,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:52,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:52,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 369 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-10-24 16:53:53,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:53:53,309 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 [2018-10-24 16:53:53,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:53,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:53:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 369 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-10-24 16:53:53,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:53:53,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 16:53:53,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:53:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:53:53,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:53:53,652 INFO L87 Difference]: Start difference. First operand 12933 states and 15114 transitions. Second operand 7 states. [2018-10-24 16:54:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:06,137 INFO L93 Difference]: Finished difference Result 38685 states and 45422 transitions. [2018-10-24 16:54:06,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:54:06,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 371 [2018-10-24 16:54:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:06,193 INFO L225 Difference]: With dead ends: 38685 [2018-10-24 16:54:06,194 INFO L226 Difference]: Without dead ends: 24020 [2018-10-24 16:54:06,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:54:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24020 states. [2018-10-24 16:54:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24020 to 21440. [2018-10-24 16:54:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21440 states. [2018-10-24 16:54:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21440 states to 21440 states and 24176 transitions. [2018-10-24 16:54:06,562 INFO L78 Accepts]: Start accepts. Automaton has 21440 states and 24176 transitions. Word has length 371 [2018-10-24 16:54:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 21440 states and 24176 transitions. [2018-10-24 16:54:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:54:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21440 states and 24176 transitions. [2018-10-24 16:54:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-24 16:54:06,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:06,577 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:06,577 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:06,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1457262941, now seen corresponding path program 1 times [2018-10-24 16:54:06,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:06,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:06,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:06,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:06,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:07,366 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-24 16:54:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 274 proven. 83 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-24 16:54:07,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:54:07,698 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 [2018-10-24 16:54:07,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:07,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:54:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 274 proven. 83 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-24 16:54:08,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:54:08,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2018-10-24 16:54:08,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:54:08,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:54:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:54:08,199 INFO L87 Difference]: Start difference. First operand 21440 states and 24176 transitions. Second operand 9 states. [2018-10-24 16:54:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:23,458 INFO L93 Difference]: Finished difference Result 45983 states and 51573 transitions. [2018-10-24 16:54:23,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:54:23,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 410 [2018-10-24 16:54:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:23,499 INFO L225 Difference]: With dead ends: 45983 [2018-10-24 16:54:23,499 INFO L226 Difference]: Without dead ends: 24971 [2018-10-24 16:54:23,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 408 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:54:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2018-10-24 16:54:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 21866. [2018-10-24 16:54:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21866 states. [2018-10-24 16:54:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21866 states to 21866 states and 24605 transitions. [2018-10-24 16:54:23,829 INFO L78 Accepts]: Start accepts. Automaton has 21866 states and 24605 transitions. Word has length 410 [2018-10-24 16:54:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 21866 states and 24605 transitions. [2018-10-24 16:54:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:54:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21866 states and 24605 transitions. [2018-10-24 16:54:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2018-10-24 16:54:23,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:23,845 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:23,845 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:23,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 435632359, now seen corresponding path program 1 times [2018-10-24 16:54:23,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:23,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:23,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:23,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:23,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:24,457 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:54:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:54:24,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:24,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:54:24,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:54:24,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:54:24,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:24,786 INFO L87 Difference]: Start difference. First operand 21866 states and 24605 transitions. Second operand 4 states. [2018-10-24 16:54:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:28,719 INFO L93 Difference]: Finished difference Result 53570 states and 60381 transitions. [2018-10-24 16:54:28,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:54:28,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2018-10-24 16:54:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:28,769 INFO L225 Difference]: With dead ends: 53570 [2018-10-24 16:54:28,770 INFO L226 Difference]: Without dead ends: 32558 [2018-10-24 16:54:28,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32558 states. [2018-10-24 16:54:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32558 to 19724. [2018-10-24 16:54:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19724 states. [2018-10-24 16:54:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19724 states to 19724 states and 22070 transitions. [2018-10-24 16:54:29,096 INFO L78 Accepts]: Start accepts. Automaton has 19724 states and 22070 transitions. Word has length 491 [2018-10-24 16:54:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 19724 states and 22070 transitions. [2018-10-24 16:54:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:54:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19724 states and 22070 transitions. [2018-10-24 16:54:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2018-10-24 16:54:29,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:29,120 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:29,120 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:29,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1531410331, now seen corresponding path program 1 times [2018-10-24 16:54:29,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:29,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:29,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 171 proven. 480 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:54:30,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:54:30,517 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 [2018-10-24 16:54:30,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:30,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:54:31,054 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2018-10-24 16:54:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 503 proven. 149 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 16:54:31,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:54:31,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 16:54:31,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:54:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:54:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:54:31,878 INFO L87 Difference]: Start difference. First operand 19724 states and 22070 transitions. Second operand 8 states. [2018-10-24 16:54:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:45,976 INFO L93 Difference]: Finished difference Result 51833 states and 57617 transitions. [2018-10-24 16:54:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 16:54:45,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 536 [2018-10-24 16:54:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:46,011 INFO L225 Difference]: With dead ends: 51833 [2018-10-24 16:54:46,011 INFO L226 Difference]: Without dead ends: 32963 [2018-10-24 16:54:46,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:54:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32963 states. [2018-10-24 16:54:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32963 to 21847. [2018-10-24 16:54:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21847 states. [2018-10-24 16:54:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 24100 transitions. [2018-10-24 16:54:46,552 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 24100 transitions. Word has length 536 [2018-10-24 16:54:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:46,553 INFO L481 AbstractCegarLoop]: Abstraction has 21847 states and 24100 transitions. [2018-10-24 16:54:46,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:54:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 24100 transitions. [2018-10-24 16:54:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-10-24 16:54:46,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:46,569 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:46,569 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:46,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1531969789, now seen corresponding path program 1 times [2018-10-24 16:54:46,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:46,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:46,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:46,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:46,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:47,139 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:54:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:54:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:47,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:54:47,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:54:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:54:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:47,390 INFO L87 Difference]: Start difference. First operand 21847 states and 24100 transitions. Second operand 4 states. [2018-10-24 16:54:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:51,691 INFO L93 Difference]: Finished difference Result 49670 states and 54776 transitions. [2018-10-24 16:54:51,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:54:51,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 545 [2018-10-24 16:54:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:51,725 INFO L225 Difference]: With dead ends: 49670 [2018-10-24 16:54:51,725 INFO L226 Difference]: Without dead ends: 28677 [2018-10-24 16:54:51,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28677 states. [2018-10-24 16:54:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28677 to 24827. [2018-10-24 16:54:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24827 states. [2018-10-24 16:54:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24827 states to 24827 states and 27174 transitions. [2018-10-24 16:54:52,046 INFO L78 Accepts]: Start accepts. Automaton has 24827 states and 27174 transitions. Word has length 545 [2018-10-24 16:54:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 24827 states and 27174 transitions. [2018-10-24 16:54:52,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:54:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24827 states and 27174 transitions. [2018-10-24 16:54:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2018-10-24 16:54:52,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:52,060 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:52,060 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:52,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 817002961, now seen corresponding path program 1 times [2018-10-24 16:54:52,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:52,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:52,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:52,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:52,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-24 16:54:52,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:52,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:54:52,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:54:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:54:52,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:54:52,500 INFO L87 Difference]: Start difference. First operand 24827 states and 27174 transitions. Second operand 5 states. [2018-10-24 16:55:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:00,527 INFO L93 Difference]: Finished difference Result 62883 states and 68877 transitions. [2018-10-24 16:55:00,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:55:00,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 553 [2018-10-24 16:55:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:00,571 INFO L225 Difference]: With dead ends: 62883 [2018-10-24 16:55:00,571 INFO L226 Difference]: Without dead ends: 37632 [2018-10-24 16:55:00,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:55:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37632 states. [2018-10-24 16:55:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37632 to 35926. [2018-10-24 16:55:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35926 states. [2018-10-24 16:55:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35926 states to 35926 states and 39130 transitions. [2018-10-24 16:55:01,064 INFO L78 Accepts]: Start accepts. Automaton has 35926 states and 39130 transitions. Word has length 553 [2018-10-24 16:55:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:01,065 INFO L481 AbstractCegarLoop]: Abstraction has 35926 states and 39130 transitions. [2018-10-24 16:55:01,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:55:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35926 states and 39130 transitions. [2018-10-24 16:55:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-10-24 16:55:01,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:01,080 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:01,080 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:01,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -166352926, now seen corresponding path program 1 times [2018-10-24 16:55:01,081 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:01,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:01,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:01,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:01,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 521 proven. 404 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-24 16:55:01,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:55:01,900 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 [2018-10-24 16:55:01,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:02,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:55:02,293 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2018-10-24 16:55:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2018-10-24 16:55:03,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:55:03,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 16:55:03,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:55:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:55:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:55:03,442 INFO L87 Difference]: Start difference. First operand 35926 states and 39130 transitions. Second operand 7 states. [2018-10-24 16:55:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:14,730 INFO L93 Difference]: Finished difference Result 92359 states and 100802 transitions. [2018-10-24 16:55:14,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:55:14,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 571 [2018-10-24 16:55:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:14,784 INFO L225 Difference]: With dead ends: 92359 [2018-10-24 16:55:14,784 INFO L226 Difference]: Without dead ends: 57286 [2018-10-24 16:55:14,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 570 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:55:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57286 states. [2018-10-24 16:55:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57286 to 50430. [2018-10-24 16:55:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50430 states. [2018-10-24 16:55:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50430 states to 50430 states and 53966 transitions. [2018-10-24 16:55:15,438 INFO L78 Accepts]: Start accepts. Automaton has 50430 states and 53966 transitions. Word has length 571 [2018-10-24 16:55:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:15,439 INFO L481 AbstractCegarLoop]: Abstraction has 50430 states and 53966 transitions. [2018-10-24 16:55:15,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:55:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 50430 states and 53966 transitions. [2018-10-24 16:55:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-10-24 16:55:15,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:15,454 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:15,454 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:15,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash -315031014, now seen corresponding path program 1 times [2018-10-24 16:55:15,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:15,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:15,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:15,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:16,155 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-24 16:55:16,636 WARN L179 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2018-10-24 16:55:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 547 proven. 501 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-24 16:55:17,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:55:17,112 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 [2018-10-24 16:55:17,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:17,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:55:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 545 proven. 293 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-10-24 16:55:18,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:55:18,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 11 [2018-10-24 16:55:18,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:55:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:55:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:55:18,237 INFO L87 Difference]: Start difference. First operand 50430 states and 53966 transitions. Second operand 11 states. [2018-10-24 16:55:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:40,599 INFO L93 Difference]: Finished difference Result 114004 states and 121686 transitions. [2018-10-24 16:55:40,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 16:55:40,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 597 [2018-10-24 16:55:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:40,662 INFO L225 Difference]: With dead ends: 114004 [2018-10-24 16:55:40,662 INFO L226 Difference]: Without dead ends: 64428 [2018-10-24 16:55:40,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 603 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2018-10-24 16:55:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64428 states. [2018-10-24 16:55:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64428 to 51283. [2018-10-24 16:55:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51283 states. [2018-10-24 16:55:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51283 states to 51283 states and 54837 transitions. [2018-10-24 16:55:41,238 INFO L78 Accepts]: Start accepts. Automaton has 51283 states and 54837 transitions. Word has length 597 [2018-10-24 16:55:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:41,238 INFO L481 AbstractCegarLoop]: Abstraction has 51283 states and 54837 transitions. [2018-10-24 16:55:41,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:55:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 51283 states and 54837 transitions. [2018-10-24 16:55:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2018-10-24 16:55:41,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:41,251 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:41,252 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:41,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash -199105205, now seen corresponding path program 1 times [2018-10-24 16:55:41,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:41,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:41,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:41,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:41,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2018-10-24 16:55:42,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:42,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:55:42,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:55:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:55:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:55:42,055 INFO L87 Difference]: Start difference. First operand 51283 states and 54837 transitions. Second operand 3 states. [2018-10-24 16:55:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:43,975 INFO L93 Difference]: Finished difference Result 98720 states and 105660 transitions. [2018-10-24 16:55:43,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:55:43,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 610 [2018-10-24 16:55:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:44,022 INFO L225 Difference]: With dead ends: 98720 [2018-10-24 16:55:44,023 INFO L226 Difference]: Without dead ends: 49995 [2018-10-24 16:55:44,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:55:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49995 states. [2018-10-24 16:55:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49995 to 47010. [2018-10-24 16:55:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47010 states. [2018-10-24 16:55:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47010 states to 47010 states and 50365 transitions. [2018-10-24 16:55:44,498 INFO L78 Accepts]: Start accepts. Automaton has 47010 states and 50365 transitions. Word has length 610 [2018-10-24 16:55:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:44,499 INFO L481 AbstractCegarLoop]: Abstraction has 47010 states and 50365 transitions. [2018-10-24 16:55:44,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:55:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 47010 states and 50365 transitions. [2018-10-24 16:55:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2018-10-24 16:55:44,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:44,508 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:44,508 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:44,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:44,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1072770807, now seen corresponding path program 1 times [2018-10-24 16:55:44,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:44,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:44,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:44,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:44,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 614 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-10-24 16:55:45,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:45,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:55:45,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:55:45,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:55:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:55:45,272 INFO L87 Difference]: Start difference. First operand 47010 states and 50365 transitions. Second operand 5 states. [2018-10-24 16:55:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:54,872 INFO L93 Difference]: Finished difference Result 102974 states and 110337 transitions. [2018-10-24 16:55:54,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:55:54,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 610 [2018-10-24 16:55:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:54,945 INFO L225 Difference]: With dead ends: 102974 [2018-10-24 16:55:54,946 INFO L226 Difference]: Without dead ends: 60232 [2018-10-24 16:55:54,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:55:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60232 states. [2018-10-24 16:55:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60232 to 47434. [2018-10-24 16:55:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47434 states. [2018-10-24 16:55:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47434 states to 47434 states and 50770 transitions. [2018-10-24 16:55:55,811 INFO L78 Accepts]: Start accepts. Automaton has 47434 states and 50770 transitions. Word has length 610 [2018-10-24 16:55:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:55,811 INFO L481 AbstractCegarLoop]: Abstraction has 47434 states and 50770 transitions. [2018-10-24 16:55:55,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:55:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47434 states and 50770 transitions. [2018-10-24 16:55:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2018-10-24 16:55:55,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:55,820 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:55,821 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:55,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:55,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1476758056, now seen corresponding path program 1 times [2018-10-24 16:55:55,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:55,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:55,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:55,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:55,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 176 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:55:56,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:55:56,595 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 [2018-10-24 16:55:56,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:56,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:55:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:55:57,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:55:57,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:55:57,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:55:57,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:55:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:55:57,486 INFO L87 Difference]: Start difference. First operand 47434 states and 50770 transitions. Second operand 8 states. [2018-10-24 16:56:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:10,080 INFO L93 Difference]: Finished difference Result 131975 states and 140449 transitions. [2018-10-24 16:56:10,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 16:56:10,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 629 [2018-10-24 16:56:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:10,180 INFO L225 Difference]: With dead ends: 131975 [2018-10-24 16:56:10,180 INFO L226 Difference]: Without dead ends: 84968 [2018-10-24 16:56:10,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:56:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84968 states. [2018-10-24 16:56:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84968 to 63162. [2018-10-24 16:56:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63162 states. [2018-10-24 16:56:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63162 states to 63162 states and 66771 transitions. [2018-10-24 16:56:11,085 INFO L78 Accepts]: Start accepts. Automaton has 63162 states and 66771 transitions. Word has length 629 [2018-10-24 16:56:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:11,086 INFO L481 AbstractCegarLoop]: Abstraction has 63162 states and 66771 transitions. [2018-10-24 16:56:11,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:56:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 63162 states and 66771 transitions. [2018-10-24 16:56:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-10-24 16:56:11,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:11,103 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:11,104 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:11,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2181000, now seen corresponding path program 1 times [2018-10-24 16:56:11,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:11,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:11,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:11,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:11,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-24 16:56:11,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:56:11,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:56:11,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:56:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:56:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:11,888 INFO L87 Difference]: Start difference. First operand 63162 states and 66771 transitions. Second operand 4 states. [2018-10-24 16:56:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:15,809 INFO L93 Difference]: Finished difference Result 124628 states and 131810 transitions. [2018-10-24 16:56:15,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:56:15,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 697 [2018-10-24 16:56:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:15,878 INFO L225 Difference]: With dead ends: 124628 [2018-10-24 16:56:15,878 INFO L226 Difference]: Without dead ends: 62320 [2018-10-24 16:56:15,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62320 states. [2018-10-24 16:56:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62320 to 58896. [2018-10-24 16:56:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58896 states. [2018-10-24 16:56:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58896 states to 58896 states and 61907 transitions. [2018-10-24 16:56:16,571 INFO L78 Accepts]: Start accepts. Automaton has 58896 states and 61907 transitions. Word has length 697 [2018-10-24 16:56:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:16,571 INFO L481 AbstractCegarLoop]: Abstraction has 58896 states and 61907 transitions. [2018-10-24 16:56:16,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:56:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 58896 states and 61907 transitions. [2018-10-24 16:56:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2018-10-24 16:56:16,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:16,584 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:16,585 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:16,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -348548639, now seen corresponding path program 1 times [2018-10-24 16:56:16,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:16,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:16,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:16,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:16,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 645 proven. 526 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-24 16:56:18,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:56:18,326 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 [2018-10-24 16:56:18,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:18,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-24 16:56:35,394 WARN L187 SmtUtils]: Removed 6 from assertion stack [2018-10-24 16:56:35,394 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 16:56:35,596 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:56:35,596 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:56:35,602 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:56:35,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:56:35 BoogieIcfgContainer [2018-10-24 16:56:35,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:56:35,603 INFO L168 Benchmark]: Toolchain (without parser) took 237684.80 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.0 GB). Peak memory consumption was 495.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:56:35,605 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. [2018-10-24 16:56:35,610 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1684.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:56:35,611 INFO L168 Benchmark]: Boogie Procedure Inliner took 530.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -921.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:56:35,612 INFO L168 Benchmark]: Boogie Preprocessor took 258.10 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 40.7 MB). Peak memory consumption was 40.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:56:35,612 INFO L168 Benchmark]: RCFGBuilder took 10295.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 472.4 MB). Peak memory consumption was 472.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:56:35,613 INFO L168 Benchmark]: TraceAbstraction took 224910.64 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:56:35,619 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 1684.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 530.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -921.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 258.10 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 40.7 MB). Peak memory consumption was 40.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10295.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 472.4 MB). Peak memory consumption was 472.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224910.64 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 140]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 140). Cancelled while BasicCegarLoop was analyzing trace of length 718 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 208. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 224.8s OverallTime, 17 OverallIterations, 6 TraceHistogramMax, 179.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5024 SDtfs, 33290 SDslu, 3268 SDs, 0 SdLazy, 74355 SolverSat, 9321 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 155.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3344 GetRequests, 3241 SyntacticMatches, 18 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63162occurred in iteration=15, 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: 6.7s AutomataMinimizationTime, 16 MinimizatonAttempts, 97077 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 10390 NumberOfCodeBlocks, 10390 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 10367 ConstructedInterpolants, 728 QuantifiedInterpolants, 25208079 SizeOfPredicates, 5 NumberOfNonLiveVariables, 4152 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 23 InterpolantComputations, 11 PerfectInterpolantSequences, 12920/15720 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown