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/Problem18_label15_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:56:05,863 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:56:05,865 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:56:05,878 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:56:05,878 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:56:05,880 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:56:05,881 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:56:05,883 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:56:05,885 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:56:05,885 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:56:05,886 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:56:05,887 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:56:05,888 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:56:05,888 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:56:05,890 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:56:05,890 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:56:05,891 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:56:05,893 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:56:05,895 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:56:05,897 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:56:05,898 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:56:05,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:56:05,902 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:56:05,902 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:56:05,903 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:56:05,904 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:56:05,905 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:56:05,906 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:56:05,907 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:56:05,908 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:56:05,908 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:56:05,909 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:56:05,909 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:56:05,909 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:56:05,910 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:56:05,911 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:56:05,911 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 16:56:05,940 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:56:05,940 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:56:05,941 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:56:05,941 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:56:05,942 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:56:05,942 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:56:05,942 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:56:05,942 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:56:05,942 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:56:05,943 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:56:05,943 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:56:05,943 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:56:05,943 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:56:05,943 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:56:05,944 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:56:05,944 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:56:05,944 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:56:05,944 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:56:05,944 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:56:05,945 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:56:05,945 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:56:05,945 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:56:05,945 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:56:05,945 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:56:05,945 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:56:05,946 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:56:05,946 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:56:05,946 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:56:05,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:56:06,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:56:06,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:56:06,023 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:56:06,023 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:56:06,024 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label15_true-unreach-call.c [2018-10-24 16:56:06,087 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6093675f7/1c81552644b1405f9d8000dd53589190/FLAG0d1c62dcf [2018-10-24 16:56:06,824 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:56:06,825 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label15_true-unreach-call.c [2018-10-24 16:56:06,848 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6093675f7/1c81552644b1405f9d8000dd53589190/FLAG0d1c62dcf [2018-10-24 16:56:06,864 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6093675f7/1c81552644b1405f9d8000dd53589190 [2018-10-24 16:56:06,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:56:06,878 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:56:06,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:56:06,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:56:06,883 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:56:06,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:56:06" (1/1) ... [2018-10-24 16:56:06,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:06, skipping insertion in model container [2018-10-24 16:56:06,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:56:06" (1/1) ... [2018-10-24 16:56:06,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:56:07,035 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:56:08,105 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:56:08,116 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:56:08,593 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:56:08,624 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:56:08,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08 WrapperNode [2018-10-24 16:56:08,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:56:08,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:56:08,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:56:08,627 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:56:08,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:08,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:56:09,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:56:09,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:56:09,082 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:56:09,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (1/1) ... [2018-10-24 16:56:09,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:56:09,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:56:09,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:56:09,323 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:56:09,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (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 16:56:09,393 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:56:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:56:09,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:56:16,613 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:56:16,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:56:16 BoogieIcfgContainer [2018-10-24 16:56:16,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:56:16,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:56:16,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:56:16,621 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:56:16,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:56:06" (1/3) ... [2018-10-24 16:56:16,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fc34ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:56:16, skipping insertion in model container [2018-10-24 16:56:16,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:56:08" (2/3) ... [2018-10-24 16:56:16,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fc34ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:56:16, skipping insertion in model container [2018-10-24 16:56:16,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:56:16" (3/3) ... [2018-10-24 16:56:16,625 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label15_true-unreach-call.c [2018-10-24 16:56:16,635 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:56:16,645 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:56:16,664 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:56:16,710 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:56:16,710 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:56:16,711 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:56:16,711 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:56:16,711 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:56:16,711 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:56:16,711 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:56:16,712 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:56:16,712 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:56:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-24 16:56:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-24 16:56:16,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:16,756 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] [2018-10-24 16:56:16,759 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:16,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1502078046, now seen corresponding path program 1 times [2018-10-24 16:56:16,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:16,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:16,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:16,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:17,183 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 16:56:17,383 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 16:56:17,385 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:56:17,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:56:17,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:56:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:56:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:56:17,410 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 6 states. [2018-10-24 16:56:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:35,030 INFO L93 Difference]: Finished difference Result 4292 states and 8414 transitions. [2018-10-24 16:56:35,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:56:35,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-10-24 16:56:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:35,080 INFO L225 Difference]: With dead ends: 4292 [2018-10-24 16:56:35,080 INFO L226 Difference]: Without dead ends: 3521 [2018-10-24 16:56:35,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:56:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2018-10-24 16:56:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2828. [2018-10-24 16:56:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2828 states. [2018-10-24 16:56:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4092 transitions. [2018-10-24 16:56:35,266 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4092 transitions. Word has length 36 [2018-10-24 16:56:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:35,266 INFO L481 AbstractCegarLoop]: Abstraction has 2828 states and 4092 transitions. [2018-10-24 16:56:35,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:56:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4092 transitions. [2018-10-24 16:56:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 16:56:35,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:35,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:35,275 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:35,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1557995980, now seen corresponding path program 1 times [2018-10-24 16:56:35,276 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:35,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:35,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:35,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:35,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:35,849 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 16:56:36,078 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2018-10-24 16:56:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:56:36,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:56:36,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:56:36,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:56:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:56:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:56:36,149 INFO L87 Difference]: Start difference. First operand 2828 states and 4092 transitions. Second operand 5 states. [2018-10-24 16:56:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:47,954 INFO L93 Difference]: Finished difference Result 8418 states and 12613 transitions. [2018-10-24 16:56:47,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:56:47,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-10-24 16:56:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:47,982 INFO L225 Difference]: With dead ends: 8418 [2018-10-24 16:56:47,982 INFO L226 Difference]: Without dead ends: 5592 [2018-10-24 16:56:47,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:56:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2018-10-24 16:56:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5592. [2018-10-24 16:56:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2018-10-24 16:56:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 7127 transitions. [2018-10-24 16:56:48,094 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 7127 transitions. Word has length 130 [2018-10-24 16:56:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:48,095 INFO L481 AbstractCegarLoop]: Abstraction has 5592 states and 7127 transitions. [2018-10-24 16:56:48,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:56:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 7127 transitions. [2018-10-24 16:56:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-24 16:56:48,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:48,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:48,100 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:48,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash 708353098, now seen corresponding path program 1 times [2018-10-24 16:56:48,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:48,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:48,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:48,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:48,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-24 16:56:48,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:56:48,553 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 16:56:48,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:48,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:56:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:56:48,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:56:48,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 16:56:48,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:56:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:56:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:56:48,799 INFO L87 Difference]: Start difference. First operand 5592 states and 7127 transitions. Second operand 5 states. [2018-10-24 16:57:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:01,353 INFO L93 Difference]: Finished difference Result 21563 states and 31341 transitions. [2018-10-24 16:57:01,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:57:01,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2018-10-24 16:57:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:01,420 INFO L225 Difference]: With dead ends: 21563 [2018-10-24 16:57:01,421 INFO L226 Difference]: Without dead ends: 16664 [2018-10-24 16:57:01,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:57:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16664 states. [2018-10-24 16:57:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16664 to 16664. [2018-10-24 16:57:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16664 states. [2018-10-24 16:57:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16664 states to 16664 states and 20659 transitions. [2018-10-24 16:57:01,761 INFO L78 Accepts]: Start accepts. Automaton has 16664 states and 20659 transitions. Word has length 219 [2018-10-24 16:57:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:01,762 INFO L481 AbstractCegarLoop]: Abstraction has 16664 states and 20659 transitions. [2018-10-24 16:57:01,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:57:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16664 states and 20659 transitions. [2018-10-24 16:57:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-10-24 16:57:01,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:01,777 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, 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, 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] [2018-10-24 16:57:01,777 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:01,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1075072866, now seen corresponding path program 1 times [2018-10-24 16:57:01,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:01,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:01,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:01,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:01,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 254 proven. 65 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-10-24 16:57:02,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:57:02,506 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 16:57:02,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:02,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:57:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-24 16:57:02,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:57:02,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 16:57:02,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:57:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:57:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:57:02,860 INFO L87 Difference]: Start difference. First operand 16664 states and 20659 transitions. Second operand 5 states. [2018-10-24 16:57:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:13,834 INFO L93 Difference]: Finished difference Result 58202 states and 76736 transitions. [2018-10-24 16:57:13,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:57:13,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2018-10-24 16:57:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:13,927 INFO L225 Difference]: With dead ends: 58202 [2018-10-24 16:57:13,928 INFO L226 Difference]: Without dead ends: 40848 [2018-10-24 16:57:13,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:57:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40848 states. [2018-10-24 16:57:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40848 to 39466. [2018-10-24 16:57:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39466 states. [2018-10-24 16:57:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39466 states to 39466 states and 46860 transitions. [2018-10-24 16:57:14,468 INFO L78 Accepts]: Start accepts. Automaton has 39466 states and 46860 transitions. Word has length 407 [2018-10-24 16:57:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:14,469 INFO L481 AbstractCegarLoop]: Abstraction has 39466 states and 46860 transitions. [2018-10-24 16:57:14,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:57:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39466 states and 46860 transitions. [2018-10-24 16:57:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-10-24 16:57:14,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:14,484 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:57:14,484 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:14,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1780739334, now seen corresponding path program 1 times [2018-10-24 16:57:14,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:14,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:14,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:15,030 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 16:57:15,471 WARN L179 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-24 16:57:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 431 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-24 16:57:15,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:57:15,862 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 16:57:15,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:15,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:57:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-24 16:57:16,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:57:16,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:57:16,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:57:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:57:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:57:16,263 INFO L87 Difference]: Start difference. First operand 39466 states and 46860 transitions. Second operand 6 states. [2018-10-24 16:57:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:28,894 INFO L93 Difference]: Finished difference Result 92075 states and 107517 transitions. [2018-10-24 16:57:28,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:57:28,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 486 [2018-10-24 16:57:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:28,965 INFO L225 Difference]: With dead ends: 92075 [2018-10-24 16:57:28,965 INFO L226 Difference]: Without dead ends: 39454 [2018-10-24 16:57:28,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 488 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:57:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39454 states. [2018-10-24 16:57:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39454 to 32524. [2018-10-24 16:57:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32524 states. [2018-10-24 16:57:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32524 states to 32524 states and 34848 transitions. [2018-10-24 16:57:29,328 INFO L78 Accepts]: Start accepts. Automaton has 32524 states and 34848 transitions. Word has length 486 [2018-10-24 16:57:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:29,329 INFO L481 AbstractCegarLoop]: Abstraction has 32524 states and 34848 transitions. [2018-10-24 16:57:29,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:57:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 32524 states and 34848 transitions. [2018-10-24 16:57:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2018-10-24 16:57:29,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:29,379 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:57:29,380 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:29,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -15644022, now seen corresponding path program 1 times [2018-10-24 16:57:29,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:29,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:29,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:29,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:29,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-24 16:57:30,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:57:30,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:57:30,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:57:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:57:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:57:30,973 INFO L87 Difference]: Start difference. First operand 32524 states and 34848 transitions. Second operand 4 states. [2018-10-24 16:57:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:36,055 INFO L93 Difference]: Finished difference Result 78866 states and 84847 transitions. [2018-10-24 16:57:36,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:57:36,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1061 [2018-10-24 16:57:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:36,136 INFO L225 Difference]: With dead ends: 78866 [2018-10-24 16:57:36,136 INFO L226 Difference]: Without dead ends: 46343 [2018-10-24 16:57:36,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 16:57:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46343 states. [2018-10-24 16:57:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46343 to 46343. [2018-10-24 16:57:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46343 states. [2018-10-24 16:57:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46343 states to 46343 states and 49080 transitions. [2018-10-24 16:57:36,632 INFO L78 Accepts]: Start accepts. Automaton has 46343 states and 49080 transitions. Word has length 1061 [2018-10-24 16:57:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 46343 states and 49080 transitions. [2018-10-24 16:57:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:57:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46343 states and 49080 transitions. [2018-10-24 16:57:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-10-24 16:57:36,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:36,700 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:57:36,700 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:36,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 705655273, now seen corresponding path program 1 times [2018-10-24 16:57:36,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:36,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:36,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:36,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:36,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 540 proven. 34 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-24 16:57:38,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:57:38,156 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 16:57:38,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:38,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:57:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2018-10-24 16:57:39,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:57:39,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:57:39,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:57:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:57:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:57:39,226 INFO L87 Difference]: Start difference. First operand 46343 states and 49080 transitions. Second operand 5 states. [2018-10-24 16:57:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:49,562 INFO L93 Difference]: Finished difference Result 103740 states and 110391 transitions. [2018-10-24 16:57:49,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:57:49,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1155 [2018-10-24 16:57:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:49,647 INFO L225 Difference]: With dead ends: 103740 [2018-10-24 16:57:49,648 INFO L226 Difference]: Without dead ends: 57397 [2018-10-24 16:57:49,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:57:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2018-10-24 16:57:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 55324. [2018-10-24 16:57:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55324 states. [2018-10-24 16:57:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55324 states to 55324 states and 57552 transitions. [2018-10-24 16:57:50,283 INFO L78 Accepts]: Start accepts. Automaton has 55324 states and 57552 transitions. Word has length 1155 [2018-10-24 16:57:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:50,286 INFO L481 AbstractCegarLoop]: Abstraction has 55324 states and 57552 transitions. [2018-10-24 16:57:50,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:57:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 55324 states and 57552 transitions. [2018-10-24 16:57:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2018-10-24 16:57:50,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:50,646 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:57:50,647 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:50,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -932309146, now seen corresponding path program 1 times [2018-10-24 16:57:50,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:50,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:50,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:50,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:50,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:51,696 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 16:57:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 1528 proven. 567 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2018-10-24 16:57:54,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:57:54,998 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 16:57:55,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:55,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:57:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 1644 proven. 0 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2018-10-24 16:57:57,043 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:57:57,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2018-10-24 16:57:57,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:57:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:57:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:57:57,046 INFO L87 Difference]: Start difference. First operand 55324 states and 57552 transitions. Second operand 10 states. [2018-10-24 16:58:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:18,065 INFO L93 Difference]: Finished difference Result 249314 states and 260878 transitions. [2018-10-24 16:58:18,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 16:58:18,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1669 [2018-10-24 16:58:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:18,306 INFO L225 Difference]: With dead ends: 249314 [2018-10-24 16:58:18,306 INFO L226 Difference]: Without dead ends: 174738 [2018-10-24 16:58:18,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1681 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2018-10-24 16:58:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174738 states. [2018-10-24 16:58:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174738 to 70505. [2018-10-24 16:58:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70505 states. [2018-10-24 16:58:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70505 states to 70505 states and 72815 transitions. [2018-10-24 16:58:19,393 INFO L78 Accepts]: Start accepts. Automaton has 70505 states and 72815 transitions. Word has length 1669 [2018-10-24 16:58:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:58:19,394 INFO L481 AbstractCegarLoop]: Abstraction has 70505 states and 72815 transitions. [2018-10-24 16:58:19,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:58:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 70505 states and 72815 transitions. [2018-10-24 16:58:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1795 [2018-10-24 16:58:19,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:58:19,458 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:58:19,458 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:58:19,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:58:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1903596378, now seen corresponding path program 1 times [2018-10-24 16:58:19,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:58:19,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:58:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:19,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:58:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:58:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2784 backedges. 1982 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2018-10-24 16:58:21,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:58:21,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:58:21,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:58:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:58:21,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:21,836 INFO L87 Difference]: Start difference. First operand 70505 states and 72815 transitions. Second operand 4 states. [2018-10-24 16:58:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:26,298 INFO L93 Difference]: Finished difference Result 157592 states and 162848 transitions. [2018-10-24 16:58:26,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:58:26,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1794 [2018-10-24 16:58:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:26,381 INFO L225 Difference]: With dead ends: 157592 [2018-10-24 16:58:26,382 INFO L226 Difference]: Without dead ends: 87780 [2018-10-24 16:58:26,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87780 states. [2018-10-24 16:58:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87780 to 81561. [2018-10-24 16:58:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81561 states. [2018-10-24 16:58:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81561 states to 81561 states and 83886 transitions. [2018-10-24 16:58:27,146 INFO L78 Accepts]: Start accepts. Automaton has 81561 states and 83886 transitions. Word has length 1794 [2018-10-24 16:58:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:58:27,147 INFO L481 AbstractCegarLoop]: Abstraction has 81561 states and 83886 transitions. [2018-10-24 16:58:27,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:58:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 81561 states and 83886 transitions. [2018-10-24 16:58:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1886 [2018-10-24 16:58:27,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:58:27,231 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:58:27,231 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:58:27,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:58:27,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1545586991, now seen corresponding path program 1 times [2018-10-24 16:58:27,232 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:58:27,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:58:27,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:27,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:58:27,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:58:28,160 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:58:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3312 backedges. 2292 proven. 0 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-10-24 16:58:29,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:58:29,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:58:29,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:58:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:58:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:29,898 INFO L87 Difference]: Start difference. First operand 81561 states and 83886 transitions. Second operand 4 states. [2018-10-24 16:58:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:35,386 INFO L93 Difference]: Finished difference Result 165185 states and 169882 transitions. [2018-10-24 16:58:35,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:58:35,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1885 [2018-10-24 16:58:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:35,471 INFO L225 Difference]: With dead ends: 165185 [2018-10-24 16:58:35,471 INFO L226 Difference]: Without dead ends: 84317 [2018-10-24 16:58:35,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84317 states. [2018-10-24 16:58:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84317 to 82244. [2018-10-24 16:58:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82244 states. [2018-10-24 16:58:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82244 states to 82244 states and 84229 transitions. [2018-10-24 16:58:36,390 INFO L78 Accepts]: Start accepts. Automaton has 82244 states and 84229 transitions. Word has length 1885 [2018-10-24 16:58:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:58:36,391 INFO L481 AbstractCegarLoop]: Abstraction has 82244 states and 84229 transitions. [2018-10-24 16:58:36,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:58:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 82244 states and 84229 transitions. [2018-10-24 16:58:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2018-10-24 16:58:36,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:58:36,465 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:58:36,465 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:58:36,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:58:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 403071248, now seen corresponding path program 1 times [2018-10-24 16:58:36,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:58:36,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:58:36,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:36,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:58:36,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:58:37,207 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:58:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 2243 proven. 0 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2018-10-24 16:58:38,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:58:38,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:58:38,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:58:38,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:58:38,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:38,692 INFO L87 Difference]: Start difference. First operand 82244 states and 84229 transitions. Second operand 4 states. [2018-10-24 16:58:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:43,493 INFO L93 Difference]: Finished difference Result 165177 states and 169154 transitions. [2018-10-24 16:58:43,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:58:43,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1916 [2018-10-24 16:58:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:43,578 INFO L225 Difference]: With dead ends: 165177 [2018-10-24 16:58:43,578 INFO L226 Difference]: Without dead ends: 83626 [2018-10-24 16:58:43,616 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 16:58:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83626 states. [2018-10-24 16:58:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83626 to 81553. [2018-10-24 16:58:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81553 states. [2018-10-24 16:58:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81553 states to 81553 states and 83173 transitions. [2018-10-24 16:58:44,242 INFO L78 Accepts]: Start accepts. Automaton has 81553 states and 83173 transitions. Word has length 1916 [2018-10-24 16:58:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:58:44,242 INFO L481 AbstractCegarLoop]: Abstraction has 81553 states and 83173 transitions. [2018-10-24 16:58:44,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:58:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 81553 states and 83173 transitions. [2018-10-24 16:58:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1963 [2018-10-24 16:58:44,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:58:44,303 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:58:44,303 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:58:44,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:58:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1840010894, now seen corresponding path program 1 times [2018-10-24 16:58:44,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:58:44,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:58:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:44,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:58:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:58:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 1585 proven. 0 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2018-10-24 16:58:47,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:58:47,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:58:47,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:58:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:58:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:58:47,327 INFO L87 Difference]: Start difference. First operand 81553 states and 83173 transitions. Second operand 4 states. [2018-10-24 16:58:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:51,956 INFO L93 Difference]: Finished difference Result 163104 states and 166355 transitions. [2018-10-24 16:58:51,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:58:51,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1962 [2018-10-24 16:58:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:52,038 INFO L225 Difference]: With dead ends: 163104 [2018-10-24 16:58:52,039 INFO L226 Difference]: Without dead ends: 76705 [2018-10-24 16:58:52,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 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 16:58:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76705 states. [2018-10-24 16:58:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76705 to 76705. [2018-10-24 16:58:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76705 states. [2018-10-24 16:58:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76705 states to 76705 states and 77811 transitions. [2018-10-24 16:58:52,772 INFO L78 Accepts]: Start accepts. Automaton has 76705 states and 77811 transitions. Word has length 1962 [2018-10-24 16:58:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:58:52,773 INFO L481 AbstractCegarLoop]: Abstraction has 76705 states and 77811 transitions. [2018-10-24 16:58:52,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:58:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 76705 states and 77811 transitions. [2018-10-24 16:58:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2347 [2018-10-24 16:58:52,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:58:52,851 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:58:52,852 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:58:52,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:58:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash 168307962, now seen corresponding path program 1 times [2018-10-24 16:58:52,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:58:52,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:58:52,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:52,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:58:52,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:58:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:58:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 3233 proven. 0 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2018-10-24 16:58:56,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:58:56,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:58:56,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:58:56,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:58:56,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:58:56,505 INFO L87 Difference]: Start difference. First operand 76705 states and 77811 transitions. Second operand 3 states. [2018-10-24 16:58:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:58:59,563 INFO L93 Difference]: Finished difference Result 152717 states and 154928 transitions. [2018-10-24 16:58:59,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:58:59,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2346 [2018-10-24 16:58:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:58:59,645 INFO L225 Difference]: With dead ends: 152717 [2018-10-24 16:58:59,645 INFO L226 Difference]: Without dead ends: 76705 [2018-10-24 16:58:59,693 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 16:58:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76705 states. [2018-10-24 16:59:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76705 to 75323. [2018-10-24 16:59:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75323 states. [2018-10-24 16:59:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75323 states to 75323 states and 76407 transitions. [2018-10-24 16:59:00,702 INFO L78 Accepts]: Start accepts. Automaton has 75323 states and 76407 transitions. Word has length 2346 [2018-10-24 16:59:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:59:00,702 INFO L481 AbstractCegarLoop]: Abstraction has 75323 states and 76407 transitions. [2018-10-24 16:59:00,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:59:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 75323 states and 76407 transitions. [2018-10-24 16:59:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2347 [2018-10-24 16:59:00,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:59:00,782 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:59:00,782 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:59:00,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:59:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash -852572033, now seen corresponding path program 1 times [2018-10-24 16:59:00,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:59:00,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:59:00,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:00,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:59:00,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:59:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 2623 proven. 1057 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2018-10-24 16:59:04,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:59:04,732 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 16:59:04,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:59:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:59:05,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:59:08,648 WARN L179 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 469 DAG size of output: 21 [2018-10-24 16:59:09,347 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-24 16:59:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 2004 proven. 0 refuted. 0 times theorem prover too weak. 3036 trivial. 0 not checked. [2018-10-24 16:59:17,260 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:59:17,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2018-10-24 16:59:17,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:59:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:59:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:59:17,263 INFO L87 Difference]: Start difference. First operand 75323 states and 76407 transitions. Second operand 9 states. [2018-10-24 16:59:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:59:33,695 INFO L93 Difference]: Finished difference Result 196270 states and 199158 transitions. [2018-10-24 16:59:33,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:59:33,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2346 [2018-10-24 16:59:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:59:33,849 INFO L225 Difference]: With dead ends: 196270 [2018-10-24 16:59:33,850 INFO L226 Difference]: Without dead ends: 121620 [2018-10-24 16:59:33,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2346 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:59:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121620 states. [2018-10-24 16:59:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121620 to 93289. [2018-10-24 16:59:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93289 states. [2018-10-24 16:59:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93289 states to 93289 states and 94619 transitions. [2018-10-24 16:59:35,224 INFO L78 Accepts]: Start accepts. Automaton has 93289 states and 94619 transitions. Word has length 2346 [2018-10-24 16:59:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:59:35,226 INFO L481 AbstractCegarLoop]: Abstraction has 93289 states and 94619 transitions. [2018-10-24 16:59:35,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:59:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 93289 states and 94619 transitions. [2018-10-24 16:59:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3097 [2018-10-24 16:59:35,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:59:35,332 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:59:35,333 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:59:35,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:59:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1879404657, now seen corresponding path program 1 times [2018-10-24 16:59:35,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:59:35,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:59:35,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:35,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:59:35,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:59:36,685 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 16:59:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10380 backedges. 6102 proven. 0 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2018-10-24 16:59:40,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:59:40,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:59:40,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:59:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:59:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:59:40,366 INFO L87 Difference]: Start difference. First operand 93289 states and 94619 transitions. Second operand 4 states. [2018-10-24 16:59:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:59:45,340 INFO L93 Difference]: Finished difference Result 189340 states and 192063 transitions. [2018-10-24 16:59:45,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:59:45,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3096 [2018-10-24 16:59:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:59:45,448 INFO L225 Difference]: With dead ends: 189340 [2018-10-24 16:59:45,448 INFO L226 Difference]: Without dead ends: 96744 [2018-10-24 16:59:45,499 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 16:59:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96744 states. [2018-10-24 16:59:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96744 to 96744. [2018-10-24 16:59:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96744 states. [2018-10-24 16:59:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96744 states to 96744 states and 98060 transitions. [2018-10-24 16:59:46,825 INFO L78 Accepts]: Start accepts. Automaton has 96744 states and 98060 transitions. Word has length 3096 [2018-10-24 16:59:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:59:46,827 INFO L481 AbstractCegarLoop]: Abstraction has 96744 states and 98060 transitions. [2018-10-24 16:59:46,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:59:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 96744 states and 98060 transitions. [2018-10-24 16:59:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3122 [2018-10-24 16:59:46,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:59:46,986 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:59:46,986 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:59:46,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:59:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1545133774, now seen corresponding path program 1 times [2018-10-24 16:59:46,987 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:59:46,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:59:46,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:46,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:59:46,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:59:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:59:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10059 backedges. 6793 proven. 0 refuted. 0 times theorem prover too weak. 3266 trivial. 0 not checked. [2018-10-24 16:59:51,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:59:51,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:59:51,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:59:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:59:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:59:51,983 INFO L87 Difference]: Start difference. First operand 96744 states and 98060 transitions. Second operand 4 states. Received shutdown request... [2018-10-24 16:59:56,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:59:56,583 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:59:56,588 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:59:56,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:59:56 BoogieIcfgContainer [2018-10-24 16:59:56,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:59:56,590 INFO L168 Benchmark]: Toolchain (without parser) took 229713.57 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,591 INFO L168 Benchmark]: CDTParser took 0.21 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 16:59:56,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1746.72 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 454.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 780.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -944.4 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,596 INFO L168 Benchmark]: Boogie Preprocessor took 240.77 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: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,597 INFO L168 Benchmark]: RCFGBuilder took 7293.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 526.6 MB). Peak memory consumption was 526.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,598 INFO L168 Benchmark]: TraceAbstraction took 219971.98 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 2.6 GB in the end (delta: -989.8 MB). Peak memory consumption was 683.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:59:56,603 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1746.72 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 454.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 780.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -944.4 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 240.77 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: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7293.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 526.6 MB). Peak memory consumption was 526.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219971.98 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 2.6 GB in the end (delta: -989.8 MB). Peak memory consumption was 683.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 114). Cancelled while BasicCegarLoop was constructing difference of abstraction (96744states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (150825 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 219.8s OverallTime, 16 OverallIterations, 13 TraceHistogramMax, 152.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7617 SDtfs, 44434 SDslu, 1609 SDs, 0 SdLazy, 97008 SolverSat, 18016 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6414 GetRequests, 6321 SyntacticMatches, 17 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96744occurred 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: 10.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 155389 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 27.4s InterpolantComputationTime, 29911 NumberOfCodeBlocks, 29911 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 29889 ConstructedInterpolants, 564 QuantifiedInterpolants, 137853199 SizeOfPredicates, 6 NumberOfNonLiveVariables, 7274 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 22 InterpolantComputations, 16 PerfectInterpolantSequences, 57185/58917 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown