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_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:54:08,957 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:54:08,959 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:54:08,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:54:08,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:54:08,974 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:54:08,975 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:54:08,976 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:54:08,978 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:54:08,979 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:54:08,980 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:54:08,980 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:54:08,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:54:08,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:54:08,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:54:08,984 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:54:08,985 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:54:08,986 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:54:08,988 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:54:08,990 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:54:08,991 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:54:08,992 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:54:08,994 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:54:08,995 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:54:08,995 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:54:08,996 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:54:08,997 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:54:08,998 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:54:08,998 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:54:08,999 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:54:09,000 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:54:09,000 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:54:09,001 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:54:09,001 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:54:09,002 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:54:09,003 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:54:09,003 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:54:09,025 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:54:09,026 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:54:09,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:54:09,027 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:54:09,028 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:54:09,028 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:54:09,028 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:54:09,028 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:54:09,028 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:54:09,029 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:54:09,029 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:54:09,029 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:54:09,029 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:54:09,029 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:54:09,030 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:54:09,030 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:54:09,030 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:54:09,030 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:54:09,030 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:54:09,031 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:54:09,031 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:54:09,031 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:54:09,031 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:54:09,032 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:54:09,032 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:54:09,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:54:09,032 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:54:09,032 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:54:09,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:54:09,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:54:09,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:54:09,108 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:54:09,108 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:54:09,109 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label29_true-unreach-call.c [2018-10-23 20:54:09,181 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0f73da271/95fb9cbfd5bb45e998ff179e67794667/FLAG090deb764 [2018-10-23 20:54:09,915 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:54:09,916 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label29_true-unreach-call.c [2018-10-23 20:54:09,943 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0f73da271/95fb9cbfd5bb45e998ff179e67794667/FLAG090deb764 [2018-10-23 20:54:09,960 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0f73da271/95fb9cbfd5bb45e998ff179e67794667 [2018-10-23 20:54:09,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:54:09,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:54:09,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:54:09,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:54:09,980 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:54:09,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:54:09" (1/1) ... [2018-10-23 20:54:09,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab4c919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:09, skipping insertion in model container [2018-10-23 20:54:09,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:54:09" (1/1) ... [2018-10-23 20:54:09,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:54:10,145 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:54:11,215 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:54:11,222 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:54:11,702 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:54:11,736 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:54:11,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11 WrapperNode [2018-10-23 20:54:11,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:54:11,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:54:11,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:54:11,739 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:54:11,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:11,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:54:12,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:54:12,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:54:12,249 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:54:12,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... [2018-10-23 20:54:12,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:54:12,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:54:12,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:54:12,511 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:54:12,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:54:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:54:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:54:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:54:19,290 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:54:19,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:54:19 BoogieIcfgContainer [2018-10-23 20:54:19,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:54:19,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:54:19,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:54:19,296 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:54:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:54:09" (1/3) ... [2018-10-23 20:54:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a52de4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:54:19, skipping insertion in model container [2018-10-23 20:54:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:54:11" (2/3) ... [2018-10-23 20:54:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a52de4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:54:19, skipping insertion in model container [2018-10-23 20:54:19,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:54:19" (3/3) ... [2018-10-23 20:54:19,300 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label29_true-unreach-call.c [2018-10-23 20:54:19,310 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:54:19,319 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:54:19,336 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:54:19,379 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:54:19,380 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:54:19,380 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:54:19,381 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:54:19,381 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:54:19,381 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:54:19,381 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:54:19,381 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:54:19,381 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:54:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 20:54:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 20:54:19,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:19,424 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:54:19,427 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:19,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 935177138, now seen corresponding path program 1 times [2018-10-23 20:54:19,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:19,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:19,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:54:19,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:19,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:54:19,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:19,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:19,810 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-23 20:54:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:30,594 INFO L93 Difference]: Finished difference Result 2918 states and 5666 transitions. [2018-10-23 20:54:30,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:54:30,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-10-23 20:54:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:30,654 INFO L225 Difference]: With dead ends: 2918 [2018-10-23 20:54:30,655 INFO L226 Difference]: Without dead ends: 2153 [2018-10-23 20:54:30,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2018-10-23 20:54:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2153. [2018-10-23 20:54:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2018-10-23 20:54:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3448 transitions. [2018-10-23 20:54:30,857 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3448 transitions. Word has length 40 [2018-10-23 20:54:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:30,858 INFO L481 AbstractCegarLoop]: Abstraction has 2153 states and 3448 transitions. [2018-10-23 20:54:30,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3448 transitions. [2018-10-23 20:54:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-23 20:54:30,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:30,866 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:54:30,866 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:30,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1617245730, now seen corresponding path program 1 times [2018-10-23 20:54:30,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:30,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:30,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:30,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:30,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:31,206 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-10-23 20:54:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:54:31,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:31,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:54:31,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:31,304 INFO L87 Difference]: Start difference. First operand 2153 states and 3448 transitions. Second operand 4 states. [2018-10-23 20:54:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:39,671 INFO L93 Difference]: Finished difference Result 6377 states and 10263 transitions. [2018-10-23 20:54:39,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:54:39,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2018-10-23 20:54:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:39,694 INFO L225 Difference]: With dead ends: 6377 [2018-10-23 20:54:39,694 INFO L226 Difference]: Without dead ends: 4226 [2018-10-23 20:54:39,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2018-10-23 20:54:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 4226. [2018-10-23 20:54:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4226 states. [2018-10-23 20:54:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 5833 transitions. [2018-10-23 20:54:39,776 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 5833 transitions. Word has length 106 [2018-10-23 20:54:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:39,777 INFO L481 AbstractCegarLoop]: Abstraction has 4226 states and 5833 transitions. [2018-10-23 20:54:39,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 5833 transitions. [2018-10-23 20:54:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-23 20:54:39,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:39,785 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:54:39,785 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:39,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1519517270, now seen corresponding path program 1 times [2018-10-23 20:54:39,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:39,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:39,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:40,403 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2018-10-23 20:54:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-23 20:54:40,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:40,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:40,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:54:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:54:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:54:40,555 INFO L87 Difference]: Start difference. First operand 4226 states and 5833 transitions. Second operand 5 states. [2018-10-23 20:54:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:49,443 INFO L93 Difference]: Finished difference Result 15360 states and 20468 transitions. [2018-10-23 20:54:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:54:49,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2018-10-23 20:54:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:49,492 INFO L225 Difference]: With dead ends: 15360 [2018-10-23 20:54:49,493 INFO L226 Difference]: Without dead ends: 11136 [2018-10-23 20:54:49,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:54:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11136 states. [2018-10-23 20:54:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11136 to 10445. [2018-10-23 20:54:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10445 states. [2018-10-23 20:54:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 12444 transitions. [2018-10-23 20:54:49,693 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 12444 transitions. Word has length 225 [2018-10-23 20:54:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:49,694 INFO L481 AbstractCegarLoop]: Abstraction has 10445 states and 12444 transitions. [2018-10-23 20:54:49,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:54:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 12444 transitions. [2018-10-23 20:54:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-10-23 20:54:49,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:49,707 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:54:49,707 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:49,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 541678018, now seen corresponding path program 1 times [2018-10-23 20:54:49,711 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:49,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:49,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:50,323 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-23 20:54:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 306 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-10-23 20:54:50,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:54:50,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:54:50,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:50,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:54:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-23 20:54:50,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:54:50,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 20:54:50,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:54:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:54:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:54:50,882 INFO L87 Difference]: Start difference. First operand 10445 states and 12444 transitions. Second operand 6 states. [2018-10-23 20:55:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:03,960 INFO L93 Difference]: Finished difference Result 31269 states and 37248 transitions. [2018-10-23 20:55:03,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:55:03,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 408 [2018-10-23 20:55:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:04,031 INFO L225 Difference]: With dead ends: 31269 [2018-10-23 20:55:04,032 INFO L226 Difference]: Without dead ends: 18750 [2018-10-23 20:55:04,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:55:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18750 states. [2018-10-23 20:55:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18750 to 13883. [2018-10-23 20:55:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13883 states. [2018-10-23 20:55:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13883 states to 13883 states and 15539 transitions. [2018-10-23 20:55:04,348 INFO L78 Accepts]: Start accepts. Automaton has 13883 states and 15539 transitions. Word has length 408 [2018-10-23 20:55:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:04,349 INFO L481 AbstractCegarLoop]: Abstraction has 13883 states and 15539 transitions. [2018-10-23 20:55:04,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:55:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 13883 states and 15539 transitions. [2018-10-23 20:55:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-10-23 20:55:04,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:04,361 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:55:04,362 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:04,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -158281945, now seen corresponding path program 1 times [2018-10-23 20:55:04,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:04,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:04,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:04,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:04,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-23 20:55:05,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:05,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:05,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:05,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:05,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:05,117 INFO L87 Difference]: Start difference. First operand 13883 states and 15539 transitions. Second operand 4 states. [2018-10-23 20:55:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:11,225 INFO L93 Difference]: Finished difference Result 31925 states and 36879 transitions. [2018-10-23 20:55:11,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:11,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 413 [2018-10-23 20:55:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:11,259 INFO L225 Difference]: With dead ends: 31925 [2018-10-23 20:55:11,259 INFO L226 Difference]: Without dead ends: 18044 [2018-10-23 20:55:11,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18044 states. [2018-10-23 20:55:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18044 to 15956. [2018-10-23 20:55:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15956 states. [2018-10-23 20:55:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15956 states to 15956 states and 17936 transitions. [2018-10-23 20:55:11,479 INFO L78 Accepts]: Start accepts. Automaton has 15956 states and 17936 transitions. Word has length 413 [2018-10-23 20:55:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:11,480 INFO L481 AbstractCegarLoop]: Abstraction has 15956 states and 17936 transitions. [2018-10-23 20:55:11,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 15956 states and 17936 transitions. [2018-10-23 20:55:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-10-23 20:55:11,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:11,491 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:55:11,491 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:11,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash -221686447, now seen corresponding path program 1 times [2018-10-23 20:55:11,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:11,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:11,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2018-10-23 20:55:11,966 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:11,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:11,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:11,967 INFO L87 Difference]: Start difference. First operand 15956 states and 17936 transitions. Second operand 4 states. [2018-10-23 20:55:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:17,086 INFO L93 Difference]: Finished difference Result 48494 states and 55980 transitions. [2018-10-23 20:55:17,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:17,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2018-10-23 20:55:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:17,142 INFO L225 Difference]: With dead ends: 48494 [2018-10-23 20:55:17,142 INFO L226 Difference]: Without dead ends: 29066 [2018-10-23 20:55:17,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29066 states. [2018-10-23 20:55:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29066 to 29066. [2018-10-23 20:55:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29066 states. [2018-10-23 20:55:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29066 states to 29066 states and 31982 transitions. [2018-10-23 20:55:17,513 INFO L78 Accepts]: Start accepts. Automaton has 29066 states and 31982 transitions. Word has length 507 [2018-10-23 20:55:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:17,514 INFO L481 AbstractCegarLoop]: Abstraction has 29066 states and 31982 transitions. [2018-10-23 20:55:17,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 29066 states and 31982 transitions. [2018-10-23 20:55:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-10-23 20:55:17,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:17,540 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:55:17,540 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:17,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash 469495703, now seen corresponding path program 1 times [2018-10-23 20:55:17,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:17,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:17,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:17,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:17,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:18,119 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:55:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-23 20:55:18,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:18,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:18,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:18,322 INFO L87 Difference]: Start difference. First operand 29066 states and 31982 transitions. Second operand 4 states. [2018-10-23 20:55:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:24,127 INFO L93 Difference]: Finished difference Result 101663 states and 112527 transitions. [2018-10-23 20:55:24,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:24,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 640 [2018-10-23 20:55:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:24,235 INFO L225 Difference]: With dead ends: 101663 [2018-10-23 20:55:24,235 INFO L226 Difference]: Without dead ends: 72599 [2018-10-23 20:55:24,279 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 [2018-10-23 20:55:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72599 states. [2018-10-23 20:55:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72599 to 70526. [2018-10-23 20:55:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70526 states. [2018-10-23 20:55:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70526 states to 70526 states and 76349 transitions. [2018-10-23 20:55:25,202 INFO L78 Accepts]: Start accepts. Automaton has 70526 states and 76349 transitions. Word has length 640 [2018-10-23 20:55:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:25,203 INFO L481 AbstractCegarLoop]: Abstraction has 70526 states and 76349 transitions. [2018-10-23 20:55:25,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 70526 states and 76349 transitions. [2018-10-23 20:55:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2018-10-23 20:55:25,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:25,226 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:25,226 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:25,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1385656680, now seen corresponding path program 1 times [2018-10-23 20:55:25,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:25,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:25,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:25,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:25,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2018-10-23 20:55:26,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:26,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:55:26,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:55:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:55:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:55:26,654 INFO L87 Difference]: Start difference. First operand 70526 states and 76349 transitions. Second operand 3 states. [2018-10-23 20:55:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:30,436 INFO L93 Difference]: Finished difference Result 141050 states and 152696 transitions. [2018-10-23 20:55:30,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:55:30,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 815 [2018-10-23 20:55:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:30,545 INFO L225 Difference]: With dead ends: 141050 [2018-10-23 20:55:30,545 INFO L226 Difference]: Without dead ends: 70526 [2018-10-23 20:55:30,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:55:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70526 states. [2018-10-23 20:55:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70526 to 70526. [2018-10-23 20:55:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70526 states. [2018-10-23 20:55:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70526 states to 70526 states and 75156 transitions. [2018-10-23 20:55:31,306 INFO L78 Accepts]: Start accepts. Automaton has 70526 states and 75156 transitions. Word has length 815 [2018-10-23 20:55:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:31,308 INFO L481 AbstractCegarLoop]: Abstraction has 70526 states and 75156 transitions. [2018-10-23 20:55:31,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:55:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 70526 states and 75156 transitions. [2018-10-23 20:55:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-10-23 20:55:31,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:31,335 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:55:31,335 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:31,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -463074975, now seen corresponding path program 1 times [2018-10-23 20:55:31,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:31,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:31,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:31,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:31,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2018-10-23 20:55:32,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:32,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:32,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:32,659 INFO L87 Difference]: Start difference. First operand 70526 states and 75156 transitions. Second operand 4 states. [2018-10-23 20:55:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:38,188 INFO L93 Difference]: Finished difference Result 159707 states and 170262 transitions. [2018-10-23 20:55:38,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:38,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 903 [2018-10-23 20:55:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:38,291 INFO L225 Difference]: With dead ends: 159707 [2018-10-23 20:55:38,291 INFO L226 Difference]: Without dead ends: 82257 [2018-10-23 20:55:38,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82257 states. [2018-10-23 20:55:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82257 to 82257. [2018-10-23 20:55:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82257 states. [2018-10-23 20:55:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82257 states to 82257 states and 85911 transitions. [2018-10-23 20:55:39,032 INFO L78 Accepts]: Start accepts. Automaton has 82257 states and 85911 transitions. Word has length 903 [2018-10-23 20:55:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:39,033 INFO L481 AbstractCegarLoop]: Abstraction has 82257 states and 85911 transitions. [2018-10-23 20:55:39,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 82257 states and 85911 transitions. [2018-10-23 20:55:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2018-10-23 20:55:39,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:39,062 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:39,062 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:39,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash -293225857, now seen corresponding path program 1 times [2018-10-23 20:55:39,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:39,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:39,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:39,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:39,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:40,077 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-23 20:55:40,599 WARN L179 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-23 20:55:41,023 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2018-10-23 20:55:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 1041 proven. 201 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-10-23 20:55:42,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:55:42,936 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:55:43,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:43,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:55:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 783 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-10-23 20:55:44,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:55:44,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-23 20:55:44,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 20:55:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 20:55:44,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:55:44,229 INFO L87 Difference]: Start difference. First operand 82257 states and 85911 transitions. Second operand 10 states. [2018-10-23 20:55:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:53,968 INFO L93 Difference]: Finished difference Result 168253 states and 175663 transitions. [2018-10-23 20:55:53,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:55:53,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1012 [2018-10-23 20:55:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:54,096 INFO L225 Difference]: With dead ends: 168253 [2018-10-23 20:55:54,096 INFO L226 Difference]: Without dead ends: 85998 [2018-10-23 20:55:54,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1011 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:55:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85998 states. [2018-10-23 20:55:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85998 to 85712. [2018-10-23 20:55:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85712 states. [2018-10-23 20:55:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85712 states to 85712 states and 89035 transitions. [2018-10-23 20:55:54,881 INFO L78 Accepts]: Start accepts. Automaton has 85712 states and 89035 transitions. Word has length 1012 [2018-10-23 20:55:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:54,881 INFO L481 AbstractCegarLoop]: Abstraction has 85712 states and 89035 transitions. [2018-10-23 20:55:54,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 20:55:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85712 states and 89035 transitions. [2018-10-23 20:55:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1564 [2018-10-23 20:55:54,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:54,919 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:54,919 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:54,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 48584363, now seen corresponding path program 1 times [2018-10-23 20:55:54,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:54,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:54,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:54,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:54,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:56,270 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:55:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1811 proven. 0 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2018-10-23 20:55:57,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:57,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:57,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:57,944 INFO L87 Difference]: Start difference. First operand 85712 states and 89035 transitions. Second operand 4 states. [2018-10-23 20:56:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:56:03,586 INFO L93 Difference]: Finished difference Result 197673 states and 205794 transitions. [2018-10-23 20:56:03,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:56:03,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1563 [2018-10-23 20:56:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:56:03,707 INFO L225 Difference]: With dead ends: 197673 [2018-10-23 20:56:03,708 INFO L226 Difference]: Without dead ends: 111962 [2018-10-23 20:56:03,764 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 [2018-10-23 20:56:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111962 states. [2018-10-23 20:56:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111962 to 109889. [2018-10-23 20:56:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109889 states. [2018-10-23 20:56:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109889 states to 109889 states and 113623 transitions. [2018-10-23 20:56:04,686 INFO L78 Accepts]: Start accepts. Automaton has 109889 states and 113623 transitions. Word has length 1563 [2018-10-23 20:56:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:56:04,687 INFO L481 AbstractCegarLoop]: Abstraction has 109889 states and 113623 transitions. [2018-10-23 20:56:04,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:56:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 109889 states and 113623 transitions. [2018-10-23 20:56:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1751 [2018-10-23 20:56:04,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:56:04,737 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, 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, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:56:04,737 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:56:04,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:56:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash 154353234, now seen corresponding path program 1 times [2018-10-23 20:56:04,738 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:56:04,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:56:04,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:56:04,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:56:04,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:56:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:56:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3399 backedges. 2286 proven. 535 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:56:08,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:56:08,915 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:56:08,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:56:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:56:09,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:56:10,244 WARN L179 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2018-10-23 20:56:10,990 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-23 20:56:12,178 WARN L179 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 29 [2018-10-23 20:56:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3399 backedges. 1162 proven. 1659 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:56:23,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:56:23,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-10-23 20:56:23,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:56:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:56:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:56:23,416 INFO L87 Difference]: Start difference. First operand 109889 states and 113623 transitions. Second operand 12 states. [2018-10-23 20:56:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:56:59,712 INFO L93 Difference]: Finished difference Result 266409 states and 276468 transitions. [2018-10-23 20:56:59,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 20:56:59,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1750 [2018-10-23 20:56:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:56:59,873 INFO L225 Difference]: With dead ends: 266409 [2018-10-23 20:56:59,873 INFO L226 Difference]: Without dead ends: 157213 [2018-10-23 20:56:59,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1764 GetRequests, 1749 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-23 20:57:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157213 states. [2018-10-23 20:57:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157213 to 141675. [2018-10-23 20:57:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141675 states. [2018-10-23 20:57:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141675 states to 141675 states and 146660 transitions. [2018-10-23 20:57:01,441 INFO L78 Accepts]: Start accepts. Automaton has 141675 states and 146660 transitions. Word has length 1750 [2018-10-23 20:57:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:57:01,442 INFO L481 AbstractCegarLoop]: Abstraction has 141675 states and 146660 transitions. [2018-10-23 20:57:01,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:57:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 141675 states and 146660 transitions. [2018-10-23 20:57:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1809 [2018-10-23 20:57:01,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:57:01,495 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, 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, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:57:01,495 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:57:01,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:57:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1973696351, now seen corresponding path program 1 times [2018-10-23 20:57:01,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:57:01,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:57:01,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:01,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:57:01,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:57:03,149 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2018-10-23 20:57:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3462 backedges. 1015 proven. 1869 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:57:09,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:57:09,208 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:57:09,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:57:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:57:09,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:57:10,113 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-10-23 20:57:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3462 backedges. 1174 proven. 1710 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:57:14,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:57:14,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 12 [2018-10-23 20:57:14,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:57:14,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:57:14,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:57:14,462 INFO L87 Difference]: Start difference. First operand 141675 states and 146660 transitions. Second operand 13 states. [2018-10-23 20:57:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:57:41,279 INFO L93 Difference]: Finished difference Result 336183 states and 348657 transitions. [2018-10-23 20:57:41,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 20:57:41,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1808 [2018-10-23 20:57:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:57:41,462 INFO L225 Difference]: With dead ends: 336183 [2018-10-23 20:57:41,462 INFO L226 Difference]: Without dead ends: 195201 [2018-10-23 20:57:41,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1833 GetRequests, 1807 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2018-10-23 20:57:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195201 states. [2018-10-23 20:57:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195201 to 142291. [2018-10-23 20:57:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142291 states. [2018-10-23 20:57:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142291 states to 142291 states and 146913 transitions. [2018-10-23 20:57:43,577 INFO L78 Accepts]: Start accepts. Automaton has 142291 states and 146913 transitions. Word has length 1808 [2018-10-23 20:57:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:57:43,579 INFO L481 AbstractCegarLoop]: Abstraction has 142291 states and 146913 transitions. [2018-10-23 20:57:43,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:57:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 142291 states and 146913 transitions. [2018-10-23 20:57:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2018-10-23 20:57:43,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:57:43,634 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:57:43,634 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:57:43,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:57:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 780107720, now seen corresponding path program 1 times [2018-10-23 20:57:43,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:57:43,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:57:43,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:43,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:57:43,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:57:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 2960 proven. 0 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2018-10-23 20:57:47,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:57:47,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:57:47,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:57:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:57:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:57:47,256 INFO L87 Difference]: Start difference. First operand 142291 states and 146913 transitions. Second operand 4 states. [2018-10-23 20:57:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:57:51,961 INFO L93 Difference]: Finished difference Result 283889 states and 293132 transitions. [2018-10-23 20:57:51,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:57:51,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1916 [2018-10-23 20:57:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:57:52,112 INFO L225 Difference]: With dead ends: 283889 [2018-10-23 20:57:52,112 INFO L226 Difference]: Without dead ends: 136755 [2018-10-23 20:57:52,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:57:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136755 states. [2018-10-23 20:57:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136755 to 136006. [2018-10-23 20:57:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136006 states. [2018-10-23 20:57:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136006 states to 136006 states and 139881 transitions. [2018-10-23 20:57:53,563 INFO L78 Accepts]: Start accepts. Automaton has 136006 states and 139881 transitions. Word has length 1916 [2018-10-23 20:57:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:57:53,564 INFO L481 AbstractCegarLoop]: Abstraction has 136006 states and 139881 transitions. [2018-10-23 20:57:53,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:57:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 136006 states and 139881 transitions. [2018-10-23 20:57:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1992 [2018-10-23 20:57:53,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:57:53,620 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-23 20:57:53,621 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:57:53,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:57:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1503172476, now seen corresponding path program 1 times [2018-10-23 20:57:53,622 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:57:53,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:57:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:53,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:57:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:57:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:57:55,351 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 Received shutdown request... [2018-10-23 20:58:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 2002 proven. 1989 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2018-10-23 20:58:00,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:58:00,260 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:58:00,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:58:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:58:00,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:58:00,721 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 20:58:00,922 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:58:00,923 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:58:00,928 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:58:00,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:58:00 BoogieIcfgContainer [2018-10-23 20:58:00,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:58:00,929 INFO L168 Benchmark]: Toolchain (without parser) took 230956.47 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -133.5 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,932 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:58:00,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1762.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 510.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -914.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,939 INFO L168 Benchmark]: Boogie Preprocessor took 261.44 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,940 INFO L168 Benchmark]: RCFGBuilder took 6780.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 544.0 MB). Peak memory consumption was 544.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,941 INFO L168 Benchmark]: TraceAbstraction took 221636.63 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 60.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-23 20:58:00,954 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1762.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 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 510.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -914.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 261.44 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6780.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 544.0 MB). Peak memory consumption was 544.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221636.63 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 60.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 126]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 126). Cancelled while BasicCegarLoop was analyzing trace of length 1992 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 221.5s OverallTime, 15 OverallIterations, 9 TraceHistogramMax, 152.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6782 SDtfs, 37295 SDslu, 1495 SDs, 0 SdLazy, 99956 SolverSat, 11018 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 121.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5093 GetRequests, 4997 SyntacticMatches, 24 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142291occurred in iteration=13, 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, 14 MinimizatonAttempts, 81275 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 31.1s InterpolantComputationTime, 17084 NumberOfCodeBlocks, 17084 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 17066 ConstructedInterpolants, 754 QuantifiedInterpolants, 141442841 SizeOfPredicates, 6 NumberOfNonLiveVariables, 5682 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 22054/28032 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown