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/Problem12_label21_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 17:57:39,165 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 17:57:39,171 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 17:57:39,188 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 17:57:39,188 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 17:57:39,189 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 17:57:39,191 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 17:57:39,193 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 17:57:39,194 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 17:57:39,195 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 17:57:39,196 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 17:57:39,196 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 17:57:39,197 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 17:57:39,198 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 17:57:39,200 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 17:57:39,200 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 17:57:39,201 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 17:57:39,203 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 17:57:39,205 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 17:57:39,207 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 17:57:39,208 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 17:57:39,209 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 17:57:39,212 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 17:57:39,212 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 17:57:39,213 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 17:57:39,214 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 17:57:39,215 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 17:57:39,216 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 17:57:39,216 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 17:57:39,218 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 17:57:39,218 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 17:57:39,219 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 17:57:39,222 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 17:57:39,246 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 17:57:39,246 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 17:57:39,247 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 17:57:39,247 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 17:57:39,248 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 17:57:39,248 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 17:57:39,248 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 17:57:39,248 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 17:57:39,249 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 17:57:39,249 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 17:57:39,249 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 17:57:39,249 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 17:57:39,249 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 17:57:39,250 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 17:57:39,250 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 17:57:39,250 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 17:57:39,250 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 17:57:39,250 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 17:57:39,251 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 17:57:39,251 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:57:39,251 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 17:57:39,251 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 17:57:39,251 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 17:57:39,252 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 17:57:39,252 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 17:57:39,252 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 17:57:39,252 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 17:57:39,252 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 17:57:39,297 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 17:57:39,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 17:57:39,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 17:57:39,321 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 17:57:39,321 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 17:57:39,322 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label21_false-unreach-call.c [2018-10-23 17:57:39,387 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d22fd44d1/4c34cc4bc7184be58b4b7e05d28e2760/FLAG49fdccc0f [2018-10-23 17:57:40,260 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 17:57:40,261 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label21_false-unreach-call.c [2018-10-23 17:57:40,295 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d22fd44d1/4c34cc4bc7184be58b4b7e05d28e2760/FLAG49fdccc0f [2018-10-23 17:57:40,315 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d22fd44d1/4c34cc4bc7184be58b4b7e05d28e2760 [2018-10-23 17:57:40,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 17:57:40,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 17:57:40,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 17:57:40,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 17:57:40,340 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 17:57:40,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:40" (1/1) ... [2018-10-23 17:57:40,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7897d110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:40, skipping insertion in model container [2018-10-23 17:57:40,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:40" (1/1) ... [2018-10-23 17:57:40,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 17:57:40,525 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 17:57:41,822 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:57:41,831 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 17:57:42,398 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:57:42,434 INFO L193 MainTranslator]: Completed translation [2018-10-23 17:57:42,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42 WrapperNode [2018-10-23 17:57:42,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 17:57:42,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 17:57:42,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 17:57:42,437 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 17:57:42,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:42,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 17:57:43,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 17:57:43,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 17:57:43,077 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 17:57:43,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (1/1) ... [2018-10-23 17:57:43,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 17:57:43,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 17:57:43,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 17:57:43,332 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 17:57:43,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (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 17:57:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 17:57:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 17:57:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 17:57:52,599 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 17:57:52,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:52 BoogieIcfgContainer [2018-10-23 17:57:52,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 17:57:52,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 17:57:52,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 17:57:52,605 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 17:57:52,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:40" (1/3) ... [2018-10-23 17:57:52,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acfc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:52, skipping insertion in model container [2018-10-23 17:57:52,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:42" (2/3) ... [2018-10-23 17:57:52,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acfc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:52, skipping insertion in model container [2018-10-23 17:57:52,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:52" (3/3) ... [2018-10-23 17:57:52,610 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label21_false-unreach-call.c [2018-10-23 17:57:52,620 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 17:57:52,630 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 17:57:52,647 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 17:57:52,689 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 17:57:52,689 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 17:57:52,689 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 17:57:52,690 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 17:57:52,690 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 17:57:52,690 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 17:57:52,690 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 17:57:52,690 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 17:57:52,690 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 17:57:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-23 17:57:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 17:57:52,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:57:52,732 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] [2018-10-23 17:57:52,734 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:57:52,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:57:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash -314381782, now seen corresponding path program 1 times [2018-10-23 17:57:52,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:57:52,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:57:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:52,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:57:52,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:57:53,156 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 17:57:53,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:57:53,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:57:53,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:57:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:57:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:57:53,185 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-23 17:58:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:09,484 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-23 17:58:09,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:58:09,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-23 17:58:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:09,529 INFO L225 Difference]: With dead ends: 3146 [2018-10-23 17:58:09,529 INFO L226 Difference]: Without dead ends: 2320 [2018-10-23 17:58:09,537 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 17:58:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-23 17:58:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-23 17:58:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-23 17:58:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-23 17:58:09,689 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 23 [2018-10-23 17:58:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:09,690 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-23 17:58:09,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:58:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-23 17:58:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-23 17:58:09,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:09,694 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 17:58:09,695 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:09,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash -595425670, now seen corresponding path program 1 times [2018-10-23 17:58:09,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:09,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:09,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-23 17:58:09,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:58:09,950 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 17:58:09,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:10,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:58:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:58:10,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:58:10,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 17:58:10,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:58:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:58:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:58:10,175 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 5 states. [2018-10-23 17:58:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:32,979 INFO L93 Difference]: Finished difference Result 15934 states and 26705 transitions. [2018-10-23 17:58:32,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 17:58:32,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2018-10-23 17:58:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:33,047 INFO L225 Difference]: With dead ends: 15934 [2018-10-23 17:58:33,048 INFO L226 Difference]: Without dead ends: 13616 [2018-10-23 17:58:33,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:58:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13616 states. [2018-10-23 17:58:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13616 to 13616. [2018-10-23 17:58:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13616 states. [2018-10-23 17:58:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13616 states to 13616 states and 18154 transitions. [2018-10-23 17:58:33,316 INFO L78 Accepts]: Start accepts. Automaton has 13616 states and 18154 transitions. Word has length 95 [2018-10-23 17:58:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:33,317 INFO L481 AbstractCegarLoop]: Abstraction has 13616 states and 18154 transitions. [2018-10-23 17:58:33,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:58:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13616 states and 18154 transitions. [2018-10-23 17:58:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-23 17:58:33,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:33,334 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:58:33,335 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:33,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1257795092, now seen corresponding path program 1 times [2018-10-23 17:58:33,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:33,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:33,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:33,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:33,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:33,747 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 17:58:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-23 17:58:33,924 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:58:33,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 17:58:33,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 17:58:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 17:58:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 17:58:33,926 INFO L87 Difference]: Start difference. First operand 13616 states and 18154 transitions. Second operand 6 states. [2018-10-23 17:58:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:45,471 INFO L93 Difference]: Finished difference Result 43022 states and 56898 transitions. [2018-10-23 17:58:45,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:58:45,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2018-10-23 17:58:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:45,560 INFO L225 Difference]: With dead ends: 43022 [2018-10-23 17:58:45,561 INFO L226 Difference]: Without dead ends: 29408 [2018-10-23 17:58:45,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:58:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29408 states. [2018-10-23 17:58:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29408 to 29408. [2018-10-23 17:58:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29408 states. [2018-10-23 17:58:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29408 states to 29408 states and 38078 transitions. [2018-10-23 17:58:46,108 INFO L78 Accepts]: Start accepts. Automaton has 29408 states and 38078 transitions. Word has length 171 [2018-10-23 17:58:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:46,109 INFO L481 AbstractCegarLoop]: Abstraction has 29408 states and 38078 transitions. [2018-10-23 17:58:46,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 17:58:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29408 states and 38078 transitions. [2018-10-23 17:58:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-23 17:58:46,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:46,115 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:58:46,116 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:46,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1131822492, now seen corresponding path program 1 times [2018-10-23 17:58:46,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:46,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:46,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:46,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:46,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:46,853 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-23 17:58:47,157 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-10-23 17:58:47,610 WARN L179 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-10-23 17:58:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 211 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-23 17:58:47,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:58:47,704 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 17:58:47,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:47,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:58:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-23 17:58:47,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:58:47,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 17:58:47,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:58:47,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:58:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:58:47,984 INFO L87 Difference]: Start difference. First operand 29408 states and 38078 transitions. Second operand 7 states. [2018-10-23 17:59:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:05,241 INFO L93 Difference]: Finished difference Result 113738 states and 145208 transitions. [2018-10-23 17:59:05,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 17:59:05,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 243 [2018-10-23 17:59:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:05,383 INFO L225 Difference]: With dead ends: 113738 [2018-10-23 17:59:05,383 INFO L226 Difference]: Without dead ends: 82072 [2018-10-23 17:59:05,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-23 17:59:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82072 states. [2018-10-23 17:59:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82072 to 60229. [2018-10-23 17:59:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60229 states. [2018-10-23 17:59:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60229 states to 60229 states and 70905 transitions. [2018-10-23 17:59:06,846 INFO L78 Accepts]: Start accepts. Automaton has 60229 states and 70905 transitions. Word has length 243 [2018-10-23 17:59:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:06,847 INFO L481 AbstractCegarLoop]: Abstraction has 60229 states and 70905 transitions. [2018-10-23 17:59:06,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:59:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 60229 states and 70905 transitions. [2018-10-23 17:59:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-23 17:59:06,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:06,858 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:59:06,859 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:06,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1849148943, now seen corresponding path program 1 times [2018-10-23 17:59:06,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:06,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:06,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-23 17:59:07,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:59:07,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:59:07,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:59:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:59:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:59:07,201 INFO L87 Difference]: Start difference. First operand 60229 states and 70905 transitions. Second operand 3 states. [2018-10-23 17:59:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:15,540 INFO L93 Difference]: Finished difference Result 132488 states and 155995 transitions. [2018-10-23 17:59:15,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:59:15,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2018-10-23 17:59:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:15,623 INFO L225 Difference]: With dead ends: 132488 [2018-10-23 17:59:15,624 INFO L226 Difference]: Without dead ends: 73013 [2018-10-23 17:59:15,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:59:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73013 states. [2018-10-23 17:59:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73013 to 70757. [2018-10-23 17:59:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70757 states. [2018-10-23 17:59:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70757 states to 70757 states and 80674 transitions. [2018-10-23 17:59:16,425 INFO L78 Accepts]: Start accepts. Automaton has 70757 states and 80674 transitions. Word has length 325 [2018-10-23 17:59:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:16,425 INFO L481 AbstractCegarLoop]: Abstraction has 70757 states and 80674 transitions. [2018-10-23 17:59:16,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:59:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 70757 states and 80674 transitions. [2018-10-23 17:59:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-10-23 17:59:16,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:16,436 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:59:16,437 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:16,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2033308095, now seen corresponding path program 1 times [2018-10-23 17:59:16,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:16,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:16,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 17:59:17,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:59:17,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:59:17,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:59:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:59:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:59:17,038 INFO L87 Difference]: Start difference. First operand 70757 states and 80674 transitions. Second operand 5 states. [2018-10-23 17:59:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:28,050 INFO L93 Difference]: Finished difference Result 204730 states and 233278 transitions. [2018-10-23 17:59:28,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:59:28,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 357 [2018-10-23 17:59:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:28,205 INFO L225 Difference]: With dead ends: 204730 [2018-10-23 17:59:28,206 INFO L226 Difference]: Without dead ends: 134727 [2018-10-23 17:59:28,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:59:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134727 states. [2018-10-23 17:59:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134727 to 106903. [2018-10-23 17:59:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106903 states. [2018-10-23 17:59:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106903 states to 106903 states and 117667 transitions. [2018-10-23 17:59:30,148 INFO L78 Accepts]: Start accepts. Automaton has 106903 states and 117667 transitions. Word has length 357 [2018-10-23 17:59:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:30,149 INFO L481 AbstractCegarLoop]: Abstraction has 106903 states and 117667 transitions. [2018-10-23 17:59:30,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:59:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 106903 states and 117667 transitions. [2018-10-23 17:59:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-10-23 17:59:30,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:30,235 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:30,235 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:30,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:30,236 INFO L82 PathProgramCache]: Analyzing trace with hash -38771310, now seen corresponding path program 1 times [2018-10-23 17:59:30,236 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:30,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:30,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:30,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:30,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 17:59:31,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:59:31,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:59:31,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:59:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:59:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:59:31,448 INFO L87 Difference]: Start difference. First operand 106903 states and 117667 transitions. Second operand 4 states. [2018-10-23 17:59:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:41,690 INFO L93 Difference]: Finished difference Result 254408 states and 282056 transitions. [2018-10-23 17:59:41,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:59:41,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 708 [2018-10-23 17:59:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:41,914 INFO L225 Difference]: With dead ends: 254408 [2018-10-23 17:59:41,914 INFO L226 Difference]: Without dead ends: 139211 [2018-10-23 17:59:41,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:59:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139211 states. [2018-10-23 17:59:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139211 to 124171. [2018-10-23 17:59:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124171 states. [2018-10-23 17:59:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124171 states to 124171 states and 134945 transitions. [2018-10-23 17:59:43,225 INFO L78 Accepts]: Start accepts. Automaton has 124171 states and 134945 transitions. Word has length 708 [2018-10-23 17:59:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:43,226 INFO L481 AbstractCegarLoop]: Abstraction has 124171 states and 134945 transitions. [2018-10-23 17:59:43,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:59:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 124171 states and 134945 transitions. [2018-10-23 17:59:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2018-10-23 17:59:43,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:43,300 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2018-10-23 17:59:43,301 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:43,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash 304312078, now seen corresponding path program 1 times [2018-10-23 17:59:43,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:43,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:43,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:43,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:43,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:44,149 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-23 17:59:44,470 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-23 17:59:44,872 WARN L179 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2018-10-23 17:59:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 778 proven. 5 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:46,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:59:46,675 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 17:59:46,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:46,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:59:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 609 proven. 174 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:48,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:59:48,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 9 [2018-10-23 17:59:48,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 17:59:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 17:59:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-23 17:59:48,323 INFO L87 Difference]: Start difference. First operand 124171 states and 134945 transitions. Second operand 9 states. [2018-10-23 18:00:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:14,462 INFO L93 Difference]: Finished difference Result 314507 states and 342884 transitions. [2018-10-23 18:00:14,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 18:00:14,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 812 [2018-10-23 18:00:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:14,660 INFO L225 Difference]: With dead ends: 314507 [2018-10-23 18:00:14,661 INFO L226 Difference]: Without dead ends: 183558 [2018-10-23 18:00:14,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 811 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:00:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183558 states. [2018-10-23 18:00:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183558 to 172274. [2018-10-23 18:00:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172274 states. [2018-10-23 18:00:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172274 states to 172274 states and 183065 transitions. [2018-10-23 18:00:16,987 INFO L78 Accepts]: Start accepts. Automaton has 172274 states and 183065 transitions. Word has length 812 [2018-10-23 18:00:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:00:16,988 INFO L481 AbstractCegarLoop]: Abstraction has 172274 states and 183065 transitions. [2018-10-23 18:00:16,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:00:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 172274 states and 183065 transitions. [2018-10-23 18:00:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2018-10-23 18:00:17,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:00:17,052 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:00:17,053 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:00:17,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:00:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1109618244, now seen corresponding path program 1 times [2018-10-23 18:00:17,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:00:17,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:00:17,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:17,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 1031 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-23 18:00:18,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:00:18,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:00:18,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:00:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:00:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:00:18,640 INFO L87 Difference]: Start difference. First operand 172274 states and 183065 transitions. Second operand 5 states. [2018-10-23 18:00:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:32,245 INFO L93 Difference]: Finished difference Result 435557 states and 462949 transitions. [2018-10-23 18:00:32,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:00:32,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 869 [2018-10-23 18:00:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:32,658 INFO L225 Difference]: With dead ends: 435557 [2018-10-23 18:00:32,658 INFO L226 Difference]: Without dead ends: 264037 [2018-10-23 18:00:32,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:00:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264037 states. [2018-10-23 18:00:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264037 to 249744. [2018-10-23 18:00:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249744 states. [2018-10-23 18:00:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249744 states to 249744 states and 264706 transitions. [2018-10-23 18:00:36,233 INFO L78 Accepts]: Start accepts. Automaton has 249744 states and 264706 transitions. Word has length 869 [2018-10-23 18:00:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:00:36,234 INFO L481 AbstractCegarLoop]: Abstraction has 249744 states and 264706 transitions. [2018-10-23 18:00:36,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:00:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 249744 states and 264706 transitions. [2018-10-23 18:00:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2018-10-23 18:00:36,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:00:36,301 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 18:00:36,302 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:00:36,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:00:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash 532999506, now seen corresponding path program 1 times [2018-10-23 18:00:36,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:00:36,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:00:36,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:36,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:36,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 1074 proven. 6 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-23 18:00:38,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:00:38,180 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 18:00:38,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:38,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:00:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 1002 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-10-23 18:00:39,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:00:39,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-23 18:00:39,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:00:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:00:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:00:39,206 INFO L87 Difference]: Start difference. First operand 249744 states and 264706 transitions. Second operand 8 states. [2018-10-23 18:00:57,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:57,311 INFO L93 Difference]: Finished difference Result 505179 states and 536677 transitions. [2018-10-23 18:00:57,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 18:00:57,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 876 [2018-10-23 18:00:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:57,626 INFO L225 Difference]: With dead ends: 505179 [2018-10-23 18:00:57,626 INFO L226 Difference]: Without dead ends: 256189 [2018-10-23 18:00:57,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:00:57,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256189 states. [2018-10-23 18:01:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256189 to 251237. [2018-10-23 18:01:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251237 states. [2018-10-23 18:01:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251237 states to 251237 states and 262806 transitions. [2018-10-23 18:01:00,882 INFO L78 Accepts]: Start accepts. Automaton has 251237 states and 262806 transitions. Word has length 876 [2018-10-23 18:01:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:01:00,882 INFO L481 AbstractCegarLoop]: Abstraction has 251237 states and 262806 transitions. [2018-10-23 18:01:00,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:01:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 251237 states and 262806 transitions. [2018-10-23 18:01:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2018-10-23 18:01:00,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:01:00,947 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 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, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:00,948 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:01:00,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:01:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2101636456, now seen corresponding path program 1 times [2018-10-23 18:01:00,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:01:00,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:01:00,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:01:00,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:01:00,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:01:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:01:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2018-10-23 18:01:02,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:01:02,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:01:02,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:01:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:01:02,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:01:02,815 INFO L87 Difference]: Start difference. First operand 251237 states and 262806 transitions. Second operand 4 states. [2018-10-23 18:01:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:01:13,696 INFO L93 Difference]: Finished difference Result 538562 states and 562917 transitions. [2018-10-23 18:01:13,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:01:13,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2018-10-23 18:01:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:01:14,043 INFO L225 Difference]: With dead ends: 538562 [2018-10-23 18:01:14,043 INFO L226 Difference]: Without dead ends: 289584 [2018-10-23 18:01:14,173 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 18:01:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289584 states. [2018-10-23 18:01:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289584 to 256496. [2018-10-23 18:01:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256496 states. [2018-10-23 18:01:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256496 states to 256496 states and 267951 transitions. [2018-10-23 18:01:17,385 INFO L78 Accepts]: Start accepts. Automaton has 256496 states and 267951 transitions. Word has length 917 [2018-10-23 18:01:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:01:17,386 INFO L481 AbstractCegarLoop]: Abstraction has 256496 states and 267951 transitions. [2018-10-23 18:01:17,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:01:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 256496 states and 267951 transitions. [2018-10-23 18:01:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2018-10-23 18:01:17,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:01:17,450 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:01:17,450 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:01:17,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:01:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1889350481, now seen corresponding path program 1 times [2018-10-23 18:01:17,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:01:17,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:01:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:01:17,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:01:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:01:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:01:18,378 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-23 18:01:18,721 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-10-23 18:01:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 905 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-23 18:01:20,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:01:20,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:01:20,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:01:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:01:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:01:20,454 INFO L87 Difference]: Start difference. First operand 256496 states and 267951 transitions. Second operand 6 states. Received shutdown request... [2018-10-23 18:01:24,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:01:24,842 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:01:24,847 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:01:24,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:01:24 BoogieIcfgContainer [2018-10-23 18:01:24,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:01:24,848 INFO L168 Benchmark]: Toolchain (without parser) took 224518.99 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,849 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:01:24,850 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2100.96 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 639.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,852 INFO L168 Benchmark]: Boogie Preprocessor took 255.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,852 INFO L168 Benchmark]: RCFGBuilder took 9268.33 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 222.3 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -160.3 MB). Peak memory consumption was 621.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,853 INFO L168 Benchmark]: TraceAbstraction took 212246.42 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: -493.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-23 18:01:24,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2100.96 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 639.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 255.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9268.33 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 222.3 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -160.3 MB). Peak memory consumption was 621.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212246.42 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: -493.4 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: 78]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 78). Cancelled while BasicCegarLoop was constructing difference of abstraction (256496states) and FLOYD_HOARE automaton (currently 6 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (21467 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 212.1s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 173.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8190 SDtfs, 33201 SDslu, 1555 SDs, 0 SdLazy, 87994 SolverSat, 16867 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 138.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2103 GetRequests, 2043 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=256496occurred in iteration=11, 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: 18.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 130580 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 8354 NumberOfCodeBlocks, 8354 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 8338 ConstructedInterpolants, 0 QuantifiedInterpolants, 19288952 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2545 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 9110/9304 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown