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/Problem15_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:16:50,141 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:16:50,143 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:16:50,162 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:16:50,162 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:16:50,163 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:16:50,165 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:16:50,167 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:16:50,170 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:16:50,171 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:16:50,176 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:16:50,176 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:16:50,177 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:16:50,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:16:50,182 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:16:50,183 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:16:50,184 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:16:50,189 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:16:50,199 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:16:50,201 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:16:50,206 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:16:50,207 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:16:50,212 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:16:50,212 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:16:50,212 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:16:50,213 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:16:50,215 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:16:50,216 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:16:50,219 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:16:50,221 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:16:50,221 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:16:50,222 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 14:16:50,226 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:16:50,256 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:16:50,256 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:16:50,257 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:16:50,257 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:16:50,258 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:16:50,259 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:16:50,259 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:16:50,259 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:16:50,259 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:16:50,260 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:16:50,260 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:16:50,260 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:16:50,260 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:16:50,260 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:16:50,261 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:16:50,262 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:16:50,262 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:16:50,262 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:16:50,262 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:16:50,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:16:50,264 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:16:50,264 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:16:50,264 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:16:50,265 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:16:50,265 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:16:50,265 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:16:50,265 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:16:50,265 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:16:50,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:16:50,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:16:50,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:16:50,353 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:16:50,353 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:16:50,354 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label00_false-unreach-call.c [2018-10-24 14:16:50,430 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5cb36f72f/5a1ad13341f249f48750f101647a8860/FLAG2bb72bb3d [2018-10-24 14:16:51,130 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:16:51,132 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label00_false-unreach-call.c [2018-10-24 14:16:51,150 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5cb36f72f/5a1ad13341f249f48750f101647a8860/FLAG2bb72bb3d [2018-10-24 14:16:51,168 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5cb36f72f/5a1ad13341f249f48750f101647a8860 [2018-10-24 14:16:51,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:16:51,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:16:51,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:16:51,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:16:51,188 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:16:51,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:51" (1/1) ... [2018-10-24 14:16:51,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:51, skipping insertion in model container [2018-10-24 14:16:51,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:51" (1/1) ... [2018-10-24 14:16:51,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:16:51,312 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:16:52,266 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:16:52,270 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:16:52,597 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:16:52,620 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:16:52,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52 WrapperNode [2018-10-24 14:16:52,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:16:52,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:16:52,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:16:52,622 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:16:52,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:52,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:16:53,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:16:53,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:16:53,037 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:16:53,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... [2018-10-24 14:16:53,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:16:53,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:16:53,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:16:53,251 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:16:53,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:16:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:16:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:16:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:17:00,334 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:17:00,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:17:00 BoogieIcfgContainer [2018-10-24 14:17:00,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:17:00,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:17:00,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:17:00,340 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:17:00,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:16:51" (1/3) ... [2018-10-24 14:17:00,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f138ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:17:00, skipping insertion in model container [2018-10-24 14:17:00,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:52" (2/3) ... [2018-10-24 14:17:00,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f138ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:17:00, skipping insertion in model container [2018-10-24 14:17:00,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:17:00" (3/3) ... [2018-10-24 14:17:00,345 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label00_false-unreach-call.c [2018-10-24 14:17:00,355 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:17:00,364 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:17:00,382 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:17:00,421 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:17:00,422 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:17:00,422 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:17:00,422 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:17:00,423 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:17:00,423 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:17:00,423 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:17:00,423 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:17:00,423 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:17:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 14:17:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 14:17:00,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:00,462 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:17:00,464 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:00,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1805984234, now seen corresponding path program 1 times [2018-10-24 14:17:00,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:00,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:00,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:00,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:00,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:17:00,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:17:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:17:00,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:17:00,725 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 3 states. [2018-10-24 14:17:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:05,258 INFO L93 Difference]: Finished difference Result 1157 states and 2109 transitions. [2018-10-24 14:17:05,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:17:05,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 14:17:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:05,398 INFO L225 Difference]: With dead ends: 1157 [2018-10-24 14:17:05,398 INFO L226 Difference]: Without dead ends: 728 [2018-10-24 14:17:05,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:17:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2018-10-24 14:17:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2018-10-24 14:17:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2018-10-24 14:17:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1105 transitions. [2018-10-24 14:17:05,532 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1105 transitions. Word has length 7 [2018-10-24 14:17:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:05,532 INFO L481 AbstractCegarLoop]: Abstraction has 726 states and 1105 transitions. [2018-10-24 14:17:05,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:17:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1105 transitions. [2018-10-24 14:17:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-24 14:17:05,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:05,535 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:17:05,536 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:05,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 696208782, now seen corresponding path program 1 times [2018-10-24 14:17:05,537 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:05,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:05,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:05,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:05,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:06,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:06,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:17:06,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:17:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:17:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:17:06,027 INFO L87 Difference]: Start difference. First operand 726 states and 1105 transitions. Second operand 5 states. [2018-10-24 14:17:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:15,247 INFO L93 Difference]: Finished difference Result 2375 states and 3553 transitions. [2018-10-24 14:17:15,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:15,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2018-10-24 14:17:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:15,265 INFO L225 Difference]: With dead ends: 2375 [2018-10-24 14:17:15,267 INFO L226 Difference]: Without dead ends: 1651 [2018-10-24 14:17:15,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:17:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2018-10-24 14:17:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1343. [2018-10-24 14:17:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2018-10-24 14:17:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1888 transitions. [2018-10-24 14:17:15,325 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1888 transitions. Word has length 73 [2018-10-24 14:17:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:15,326 INFO L481 AbstractCegarLoop]: Abstraction has 1343 states and 1888 transitions. [2018-10-24 14:17:15,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:17:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1888 transitions. [2018-10-24 14:17:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-24 14:17:15,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:15,330 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:17:15,330 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:15,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1704706976, now seen corresponding path program 1 times [2018-10-24 14:17:15,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:15,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:15,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:15,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:15,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:15,480 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:15,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:17:15,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:17:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:17:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:15,481 INFO L87 Difference]: Start difference. First operand 1343 states and 1888 transitions. Second operand 4 states. [2018-10-24 14:17:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:21,723 INFO L93 Difference]: Finished difference Result 4799 states and 6894 transitions. [2018-10-24 14:17:21,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:21,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2018-10-24 14:17:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:21,741 INFO L225 Difference]: With dead ends: 4799 [2018-10-24 14:17:21,741 INFO L226 Difference]: Without dead ends: 3458 [2018-10-24 14:17:21,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2018-10-24 14:17:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3452. [2018-10-24 14:17:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3452 states. [2018-10-24 14:17:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 4525 transitions. [2018-10-24 14:17:21,806 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 4525 transitions. Word has length 78 [2018-10-24 14:17:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:21,807 INFO L481 AbstractCegarLoop]: Abstraction has 3452 states and 4525 transitions. [2018-10-24 14:17:21,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:17:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 4525 transitions. [2018-10-24 14:17:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-24 14:17:21,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:21,809 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:17:21,809 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:21,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash 66918333, now seen corresponding path program 1 times [2018-10-24 14:17:21,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:21,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:21,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:21,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:21,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:21,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:21,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:17:21,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:17:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:17:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:21,979 INFO L87 Difference]: Start difference. First operand 3452 states and 4525 transitions. Second operand 4 states. [2018-10-24 14:17:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:29,300 INFO L93 Difference]: Finished difference Result 10886 states and 14684 transitions. [2018-10-24 14:17:29,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:29,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2018-10-24 14:17:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:29,337 INFO L225 Difference]: With dead ends: 10886 [2018-10-24 14:17:29,337 INFO L226 Difference]: Without dead ends: 7436 [2018-10-24 14:17:29,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7436 states. [2018-10-24 14:17:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7436 to 7401. [2018-10-24 14:17:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7401 states. [2018-10-24 14:17:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 9503 transitions. [2018-10-24 14:17:29,488 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 9503 transitions. Word has length 99 [2018-10-24 14:17:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:29,489 INFO L481 AbstractCegarLoop]: Abstraction has 7401 states and 9503 transitions. [2018-10-24 14:17:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:17:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 9503 transitions. [2018-10-24 14:17:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-24 14:17:29,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:29,493 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:17:29,493 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:29,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -753781725, now seen corresponding path program 1 times [2018-10-24 14:17:29,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:29,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:29,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:29,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:29,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-24 14:17:29,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:17:29,687 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:17:29,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:29,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:17:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:29,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:17:29,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 14:17:29,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:17:29,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:17:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:29,950 INFO L87 Difference]: Start difference. First operand 7401 states and 9503 transitions. Second operand 4 states. [2018-10-24 14:17:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:35,323 INFO L93 Difference]: Finished difference Result 22986 states and 30364 transitions. [2018-10-24 14:17:35,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:35,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2018-10-24 14:17:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:35,400 INFO L225 Difference]: With dead ends: 22986 [2018-10-24 14:17:35,400 INFO L226 Difference]: Without dead ends: 15887 [2018-10-24 14:17:35,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15887 states. [2018-10-24 14:17:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15887 to 10399. [2018-10-24 14:17:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10399 states. [2018-10-24 14:17:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 12693 transitions. [2018-10-24 14:17:35,672 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 12693 transitions. Word has length 166 [2018-10-24 14:17:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:35,672 INFO L481 AbstractCegarLoop]: Abstraction has 10399 states and 12693 transitions. [2018-10-24 14:17:35,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:17:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 12693 transitions. [2018-10-24 14:17:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-24 14:17:35,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:35,679 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:17:35,679 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:35,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1128372212, now seen corresponding path program 1 times [2018-10-24 14:17:35,683 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:35,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:35,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:35,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:35,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:36,275 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-24 14:17:36,529 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 14:17:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:36,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:36,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:17:36,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:17:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:17:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:17:36,650 INFO L87 Difference]: Start difference. First operand 10399 states and 12693 transitions. Second operand 5 states. [2018-10-24 14:17:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:40,287 INFO L93 Difference]: Finished difference Result 21099 states and 25769 transitions. [2018-10-24 14:17:40,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:40,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2018-10-24 14:17:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:40,312 INFO L225 Difference]: With dead ends: 21099 [2018-10-24 14:17:40,312 INFO L226 Difference]: Without dead ends: 11002 [2018-10-24 14:17:40,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:17:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2018-10-24 14:17:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 10999. [2018-10-24 14:17:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10999 states. [2018-10-24 14:17:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10999 states to 10999 states and 13311 transitions. [2018-10-24 14:17:40,497 INFO L78 Accepts]: Start accepts. Automaton has 10999 states and 13311 transitions. Word has length 166 [2018-10-24 14:17:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:40,498 INFO L481 AbstractCegarLoop]: Abstraction has 10999 states and 13311 transitions. [2018-10-24 14:17:40,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:17:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 10999 states and 13311 transitions. [2018-10-24 14:17:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-24 14:17:40,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:40,500 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:17:40,501 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:40,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1633315711, now seen corresponding path program 1 times [2018-10-24 14:17:40,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:40,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:40,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:40,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:40,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:40,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:40,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:17:40,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:17:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:17:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:40,801 INFO L87 Difference]: Start difference. First operand 10999 states and 13311 transitions. Second operand 4 states. [2018-10-24 14:17:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:50,064 INFO L93 Difference]: Finished difference Result 23850 states and 29001 transitions. [2018-10-24 14:17:50,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:50,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2018-10-24 14:17:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:50,102 INFO L225 Difference]: With dead ends: 23850 [2018-10-24 14:17:50,103 INFO L226 Difference]: Without dead ends: 13153 [2018-10-24 14:17:50,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13153 states. [2018-10-24 14:17:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13153 to 11609. [2018-10-24 14:17:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11609 states. [2018-10-24 14:17:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11609 states to 11609 states and 14169 transitions. [2018-10-24 14:17:50,284 INFO L78 Accepts]: Start accepts. Automaton has 11609 states and 14169 transitions. Word has length 184 [2018-10-24 14:17:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:50,285 INFO L481 AbstractCegarLoop]: Abstraction has 11609 states and 14169 transitions. [2018-10-24 14:17:50,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:17:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 11609 states and 14169 transitions. [2018-10-24 14:17:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-24 14:17:50,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:50,288 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:17:50,289 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:50,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash 318381937, now seen corresponding path program 1 times [2018-10-24 14:17:50,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:50,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:50,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:50,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:50,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:17:50,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:50,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:17:50,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:17:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:17:50,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:50,738 INFO L87 Difference]: Start difference. First operand 11609 states and 14169 transitions. Second operand 4 states. [2018-10-24 14:17:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:17:57,360 INFO L93 Difference]: Finished difference Result 21705 states and 26619 transitions. [2018-10-24 14:17:57,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:17:57,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2018-10-24 14:17:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:17:57,384 INFO L225 Difference]: With dead ends: 21705 [2018-10-24 14:17:57,384 INFO L226 Difference]: Without dead ends: 10398 [2018-10-24 14:17:57,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:17:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10398 states. [2018-10-24 14:17:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10398 to 7967. [2018-10-24 14:17:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7967 states. [2018-10-24 14:17:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7967 states to 7967 states and 9792 transitions. [2018-10-24 14:17:57,522 INFO L78 Accepts]: Start accepts. Automaton has 7967 states and 9792 transitions. Word has length 241 [2018-10-24 14:17:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:17:57,522 INFO L481 AbstractCegarLoop]: Abstraction has 7967 states and 9792 transitions. [2018-10-24 14:17:57,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:17:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7967 states and 9792 transitions. [2018-10-24 14:17:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-24 14:17:57,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:17:57,529 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:17:57,529 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:17:57,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:17:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash 280969319, now seen corresponding path program 1 times [2018-10-24 14:17:57,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:17:57,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:17:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:57,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:17:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:17:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:17:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-24 14:17:58,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:17:58,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:17:58,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:17:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:17:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:17:58,050 INFO L87 Difference]: Start difference. First operand 7967 states and 9792 transitions. Second operand 3 states. [2018-10-24 14:18:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:18:06,239 INFO L93 Difference]: Finished difference Result 15632 states and 19277 transitions. [2018-10-24 14:18:06,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:18:06,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 296 [2018-10-24 14:18:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:18:06,253 INFO L225 Difference]: With dead ends: 15632 [2018-10-24 14:18:06,253 INFO L226 Difference]: Without dead ends: 7667 [2018-10-24 14:18:06,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:18:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2018-10-24 14:18:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 7664. [2018-10-24 14:18:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7664 states. [2018-10-24 14:18:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 9198 transitions. [2018-10-24 14:18:06,353 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 9198 transitions. Word has length 296 [2018-10-24 14:18:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:18:06,353 INFO L481 AbstractCegarLoop]: Abstraction has 7664 states and 9198 transitions. [2018-10-24 14:18:06,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:18:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 9198 transitions. [2018-10-24 14:18:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-10-24 14:18:06,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:18:06,362 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:18:06,362 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:18:06,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:18:06,362 INFO L82 PathProgramCache]: Analyzing trace with hash -423493494, now seen corresponding path program 1 times [2018-10-24 14:18:06,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:18:06,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:18:06,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:18:06,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:18:06,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:18:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:18:06,889 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 3 [2018-10-24 14:18:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:18:07,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:18:07,206 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:18:07,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:18:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:18:07,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:18:08,622 WARN L179 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 28 [2018-10-24 14:18:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:18:09,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:18:09,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-24 14:18:09,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:18:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:18:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:18:09,483 INFO L87 Difference]: Start difference. First operand 7664 states and 9198 transitions. Second operand 7 states. [2018-10-24 14:20:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:42,468 INFO L93 Difference]: Finished difference Result 26283 states and 32548 transitions. [2018-10-24 14:20:42,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:20:42,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 356 [2018-10-24 14:20:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:42,503 INFO L225 Difference]: With dead ends: 26283 [2018-10-24 14:20:42,503 INFO L226 Difference]: Without dead ends: 18621 [2018-10-24 14:20:42,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:20:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18621 states. [2018-10-24 14:20:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18621 to 10982. [2018-10-24 14:20:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10982 states. [2018-10-24 14:20:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 13523 transitions. [2018-10-24 14:20:42,695 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 13523 transitions. Word has length 356 [2018-10-24 14:20:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:42,695 INFO L481 AbstractCegarLoop]: Abstraction has 10982 states and 13523 transitions. [2018-10-24 14:20:42,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:20:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 13523 transitions. [2018-10-24 14:20:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-24 14:20:42,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:42,710 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:42,711 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:42,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1127810796, now seen corresponding path program 1 times [2018-10-24 14:20:42,711 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:42,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:42,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:42,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:20:43,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:20:43,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:20:43,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:20:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:20:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:20:43,137 INFO L87 Difference]: Start difference. First operand 10982 states and 13523 transitions. Second operand 4 states. [2018-10-24 14:20:47,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:47,817 INFO L93 Difference]: Finished difference Result 27970 states and 34759 transitions. [2018-10-24 14:20:47,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:20:47,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2018-10-24 14:20:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:47,835 INFO L225 Difference]: With dead ends: 27970 [2018-10-24 14:20:47,835 INFO L226 Difference]: Without dead ends: 17290 [2018-10-24 14:20:47,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:20:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17290 states. [2018-10-24 14:20:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17290 to 16983. [2018-10-24 14:20:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16983 states. [2018-10-24 14:20:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16983 states to 16983 states and 20115 transitions. [2018-10-24 14:20:48,054 INFO L78 Accepts]: Start accepts. Automaton has 16983 states and 20115 transitions. Word has length 410 [2018-10-24 14:20:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:48,055 INFO L481 AbstractCegarLoop]: Abstraction has 16983 states and 20115 transitions. [2018-10-24 14:20:48,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:20:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16983 states and 20115 transitions. [2018-10-24 14:20:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-10-24 14:20:48,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:48,065 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 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] [2018-10-24 14:20:48,065 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:48,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1994188793, now seen corresponding path program 1 times [2018-10-24 14:20:48,066 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:48,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:48,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:48,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:48,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:48,763 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-24 14:20:49,119 WARN L179 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-24 14:20:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 227 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 14:20:49,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:20:49,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:20:49,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:49,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:20:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 192 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 14:20:50,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:20:50,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-24 14:20:50,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:20:50,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:20:50,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:20:50,643 INFO L87 Difference]: Start difference. First operand 16983 states and 20115 transitions. Second operand 9 states. [2018-10-24 14:21:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:21:03,473 INFO L93 Difference]: Finished difference Result 40874 states and 48350 transitions. [2018-10-24 14:21:03,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 14:21:03,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 413 [2018-10-24 14:21:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:21:03,495 INFO L225 Difference]: With dead ends: 40874 [2018-10-24 14:21:03,496 INFO L226 Difference]: Without dead ends: 16918 [2018-10-24 14:21:03,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 410 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:21:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2018-10-24 14:21:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 13313. [2018-10-24 14:21:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13313 states. [2018-10-24 14:21:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13313 states to 13313 states and 14523 transitions. [2018-10-24 14:21:03,848 INFO L78 Accepts]: Start accepts. Automaton has 13313 states and 14523 transitions. Word has length 413 [2018-10-24 14:21:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:21:03,848 INFO L481 AbstractCegarLoop]: Abstraction has 13313 states and 14523 transitions. [2018-10-24 14:21:03,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:21:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13313 states and 14523 transitions. [2018-10-24 14:21:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-10-24 14:21:03,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:21:03,853 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:21:03,853 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:21:03,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:21:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 880056842, now seen corresponding path program 1 times [2018-10-24 14:21:03,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:21:03,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:21:03,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:21:03,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:21:03,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:21:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:21:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 14:21:04,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:21:04,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:21:04,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:21:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:21:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:21:04,351 INFO L87 Difference]: Start difference. First operand 13313 states and 14523 transitions. Second operand 4 states. Received shutdown request... [2018-10-24 14:21:04,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:21:04,731 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:21:04,737 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:21:04,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:21:04 BoogieIcfgContainer [2018-10-24 14:21:04,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:21:04,740 INFO L168 Benchmark]: Toolchain (without parser) took 253558.28 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 449.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,741 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:21:04,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1437.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 414.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.4 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,747 INFO L168 Benchmark]: Boogie Preprocessor took 213.23 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,749 INFO L168 Benchmark]: RCFGBuilder took 7084.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 302.4 MB). Peak memory consumption was 302.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,749 INFO L168 Benchmark]: TraceAbstraction took 244402.86 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 892.3 MB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -775.1 MB). Peak memory consumption was 117.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:21:04,761 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 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 1437.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 414.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.4 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 213.23 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7084.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 302.4 MB). Peak memory consumption was 302.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244402.86 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 892.3 MB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -775.1 MB). Peak memory consumption was 117.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 25). Cancelled while BasicCegarLoop was constructing difference of abstraction (13313states) and FLOYD_HOARE automaton (currently 3 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (20 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 244.3s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 231.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4368 SDtfs, 11520 SDslu, 2115 SDs, 0 SdLazy, 28776 SolverSat, 4830 SolverUnsat, 47 SolverUnknown, 0 SolverNotchecked, 221.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 991 GetRequests, 944 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16983occurred 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: 1.9s AutomataMinimizationTime, 12 MinimizatonAttempts, 21371 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 3885 NumberOfCodeBlocks, 3885 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3869 ConstructedInterpolants, 66 QuantifiedInterpolants, 8284065 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1193 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 1111/1292 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown