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/Problem03_label25_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:01:38,202 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:01:38,204 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:01:38,222 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:01:38,223 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:01:38,224 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:01:38,226 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:01:38,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:01:38,231 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:01:38,233 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:01:38,234 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:01:38,235 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:01:38,237 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:01:38,239 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:01:38,240 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:01:38,244 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:01:38,245 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:01:38,248 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:01:38,257 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:01:38,258 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:01:38,259 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:01:38,260 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:01:38,262 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:01:38,262 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:01:38,263 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:01:38,263 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:01:38,264 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:01:38,265 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:01:38,266 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:01:38,271 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:01:38,271 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:01:38,271 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:01:38,272 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:01:38,272 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:01:38,275 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:01:38,276 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:01:38,276 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 [2018-10-26 20:01:38,304 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:01:38,305 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:01:38,306 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:01:38,307 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:01:38,307 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:01:38,307 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:01:38,307 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 20:01:38,309 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:01:38,309 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:01:38,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:01:38,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:01:38,309 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:01:38,310 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:01:38,310 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:01:38,310 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:01:38,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:01:38,311 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:01:38,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:01:38,312 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:01:38,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:01:38,312 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:01:38,313 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:01:38,313 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:01:38,313 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 20:01:38,313 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:01:38,313 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:01:38,314 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:01:38,314 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 20:01:38,389 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:01:38,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:01:38,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:01:38,409 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:01:38,410 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:01:38,411 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-10-26 20:01:38,473 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ffe60003f/07079b277a344cbfb034b6ad0d14e571/FLAG1ad615d6a [2018-10-26 20:01:39,139 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:01:39,140 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-10-26 20:01:39,164 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ffe60003f/07079b277a344cbfb034b6ad0d14e571/FLAG1ad615d6a [2018-10-26 20:01:39,186 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ffe60003f/07079b277a344cbfb034b6ad0d14e571 [2018-10-26 20:01:39,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:01:39,196 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 20:01:39,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:01:39,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:01:39,202 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:01:39,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:01:39" (1/1) ... [2018-10-26 20:01:39,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedfbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:39, skipping insertion in model container [2018-10-26 20:01:39,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:01:39" (1/1) ... [2018-10-26 20:01:39,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:01:39,318 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:01:40,123 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:01:40,128 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:01:40,362 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:01:40,385 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:01:40,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40 WrapperNode [2018-10-26 20:01:40,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:01:40,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:01:40,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:01:40,387 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:01:40,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:01:40,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:01:40,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:01:40,701 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:01:40,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (1/1) ... [2018-10-26 20:01:40,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:01:40,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:01:40,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:01:40,823 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:01:40,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (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 [2018-10-26 20:01:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 20:01:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:01:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:01:45,971 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:01:45,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:01:45 BoogieIcfgContainer [2018-10-26 20:01:45,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:01:45,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:01:45,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:01:45,978 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:01:45,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:01:39" (1/3) ... [2018-10-26 20:01:45,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:01:45, skipping insertion in model container [2018-10-26 20:01:45,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:40" (2/3) ... [2018-10-26 20:01:45,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:01:45, skipping insertion in model container [2018-10-26 20:01:45,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:01:45" (3/3) ... [2018-10-26 20:01:45,983 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25_true-unreach-call.c [2018-10-26 20:01:45,994 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:01:46,002 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:01:46,017 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:01:46,061 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:01:46,062 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:01:46,062 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:01:46,062 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:01:46,063 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:01:46,063 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:01:46,063 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:01:46,063 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:01:46,063 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:01:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-26 20:01:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-26 20:01:46,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:01:46,135 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:01:46,137 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:01:46,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:01:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1142527790, now seen corresponding path program 1 times [2018-10-26 20:01:46,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:01:46,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:01:46,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:46,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:01:46,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:01:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:01:47,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:01:47,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:01:47,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 20:01:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 20:01:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:01:47,097 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-26 20:01:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:01:50,676 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-10-26 20:01:50,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 20:01:50,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2018-10-26 20:01:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:01:50,726 INFO L225 Difference]: With dead ends: 1027 [2018-10-26 20:01:50,726 INFO L226 Difference]: Without dead ends: 717 [2018-10-26 20:01:50,736 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 [2018-10-26 20:01:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-10-26 20:01:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-10-26 20:01:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-10-26 20:01:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-10-26 20:01:50,871 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 181 [2018-10-26 20:01:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:01:50,872 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-10-26 20:01:50,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 20:01:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-10-26 20:01:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-26 20:01:50,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:01:50,884 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 20:01:50,884 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:01:50,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:01:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -71550157, now seen corresponding path program 1 times [2018-10-26 20:01:50,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:01:50,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:01:50,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:50,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:01:50,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:01:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:01:51,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:01:51,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:01:51,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:01:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:01:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:01:51,053 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-10-26 20:01:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:01:53,196 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-10-26 20:01:53,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:01:53,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-10-26 20:01:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:01:53,205 INFO L225 Difference]: With dead ends: 2058 [2018-10-26 20:01:53,206 INFO L226 Difference]: Without dead ends: 1345 [2018-10-26 20:01:53,210 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 [2018-10-26 20:01:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-10-26 20:01:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-10-26 20:01:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-26 20:01:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-10-26 20:01:53,248 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 190 [2018-10-26 20:01:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:01:53,248 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-10-26 20:01:53,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:01:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-10-26 20:01:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-26 20:01:53,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:01:53,253 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2018-10-26 20:01:53,254 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:01:53,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:01:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1566196018, now seen corresponding path program 1 times [2018-10-26 20:01:53,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:01:53,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:01:53,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:53,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:01:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:01:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-26 20:01:53,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:01:53,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:01:53,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:01:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:01:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:01:53,380 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-10-26 20:01:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:01:55,904 INFO L93 Difference]: Finished difference Result 3977 states and 6209 transitions. [2018-10-26 20:01:55,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:01:55,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2018-10-26 20:01:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:01:55,920 INFO L225 Difference]: With dead ends: 3977 [2018-10-26 20:01:55,921 INFO L226 Difference]: Without dead ends: 2648 [2018-10-26 20:01:55,924 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 [2018-10-26 20:01:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2018-10-26 20:01:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2645. [2018-10-26 20:01:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2645 states. [2018-10-26 20:01:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4120 transitions. [2018-10-26 20:01:55,995 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4120 transitions. Word has length 204 [2018-10-26 20:01:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:01:55,996 INFO L481 AbstractCegarLoop]: Abstraction has 2645 states and 4120 transitions. [2018-10-26 20:01:55,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:01:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4120 transitions. [2018-10-26 20:01:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-26 20:01:56,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:01:56,003 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:01:56,003 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:01:56,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:01:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1900454302, now seen corresponding path program 1 times [2018-10-26 20:01:56,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:01:56,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:01:56,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:56,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:01:56,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:01:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 20:01:56,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:01:56,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:01:56,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:01:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:01:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:01:56,169 INFO L87 Difference]: Start difference. First operand 2645 states and 4120 transitions. Second operand 3 states. [2018-10-26 20:01:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:01:56,973 INFO L93 Difference]: Finished difference Result 5250 states and 8186 transitions. [2018-10-26 20:01:56,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:01:56,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2018-10-26 20:01:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:01:56,987 INFO L225 Difference]: With dead ends: 5250 [2018-10-26 20:01:56,987 INFO L226 Difference]: Without dead ends: 2607 [2018-10-26 20:01:56,991 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 [2018-10-26 20:01:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2018-10-26 20:01:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2607. [2018-10-26 20:01:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2018-10-26 20:01:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3992 transitions. [2018-10-26 20:01:57,047 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3992 transitions. Word has length 212 [2018-10-26 20:01:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:01:57,047 INFO L481 AbstractCegarLoop]: Abstraction has 2607 states and 3992 transitions. [2018-10-26 20:01:57,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:01:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3992 transitions. [2018-10-26 20:01:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-26 20:01:57,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:01:57,052 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:01:57,053 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:01:57,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:01:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 513716310, now seen corresponding path program 1 times [2018-10-26 20:01:57,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:01:57,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:01:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:57,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:01:57,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:01:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:01:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:01:57,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:01:57,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 20:01:57,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:01:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:01:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:01:57,510 INFO L87 Difference]: Start difference. First operand 2607 states and 3992 transitions. Second operand 5 states. [2018-10-26 20:02:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:01,480 INFO L93 Difference]: Finished difference Result 6279 states and 9778 transitions. [2018-10-26 20:02:01,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:02:01,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-10-26 20:02:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:01,502 INFO L225 Difference]: With dead ends: 6279 [2018-10-26 20:02:01,502 INFO L226 Difference]: Without dead ends: 3674 [2018-10-26 20:02:01,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:02:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2018-10-26 20:02:01,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3015. [2018-10-26 20:02:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2018-10-26 20:02:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4612 transitions. [2018-10-26 20:02:01,568 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4612 transitions. Word has length 221 [2018-10-26 20:02:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:01,569 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4612 transitions. [2018-10-26 20:02:01,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:02:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4612 transitions. [2018-10-26 20:02:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-26 20:02:01,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:01,576 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:01,577 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:01,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1356125514, now seen corresponding path program 1 times [2018-10-26 20:02:01,577 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:01,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:01,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:01,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 20:02:01,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:02:01,928 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 [2018-10-26 20:02:01,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:02,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:02:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-26 20:02:02,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 20:02:02,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-26 20:02:02,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 20:02:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 20:02:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:02:02,247 INFO L87 Difference]: Start difference. First operand 3015 states and 4612 transitions. Second operand 4 states. [2018-10-26 20:02:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:05,925 INFO L93 Difference]: Finished difference Result 12048 states and 18435 transitions. [2018-10-26 20:02:05,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 20:02:05,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 257 [2018-10-26 20:02:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:05,965 INFO L225 Difference]: With dead ends: 12048 [2018-10-26 20:02:05,965 INFO L226 Difference]: Without dead ends: 9035 [2018-10-26 20:02:05,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:02:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2018-10-26 20:02:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 6022. [2018-10-26 20:02:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6022 states. [2018-10-26 20:02:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 9192 transitions. [2018-10-26 20:02:06,133 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 9192 transitions. Word has length 257 [2018-10-26 20:02:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:06,134 INFO L481 AbstractCegarLoop]: Abstraction has 6022 states and 9192 transitions. [2018-10-26 20:02:06,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 20:02:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 9192 transitions. [2018-10-26 20:02:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-26 20:02:06,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:06,146 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:06,146 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:06,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1301877585, now seen corresponding path program 1 times [2018-10-26 20:02:06,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:06,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:06,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:06,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:06,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 20:02:06,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:06,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:06,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:02:06,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:02:06,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:02:06,390 INFO L87 Difference]: Start difference. First operand 6022 states and 9192 transitions. Second operand 3 states. [2018-10-26 20:02:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:07,898 INFO L93 Difference]: Finished difference Result 17361 states and 26560 transitions. [2018-10-26 20:02:07,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:02:07,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2018-10-26 20:02:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:07,942 INFO L225 Difference]: With dead ends: 17361 [2018-10-26 20:02:07,942 INFO L226 Difference]: Without dead ends: 11341 [2018-10-26 20:02:07,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:02:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2018-10-26 20:02:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11337. [2018-10-26 20:02:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-26 20:02:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 15999 transitions. [2018-10-26 20:02:08,221 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 15999 transitions. Word has length 257 [2018-10-26 20:02:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:08,222 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 15999 transitions. [2018-10-26 20:02:08,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:02:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 15999 transitions. [2018-10-26 20:02:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-26 20:02:08,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:08,238 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 20:02:08,239 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:08,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:08,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1155660912, now seen corresponding path program 1 times [2018-10-26 20:02:08,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:08,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:08,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:08,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:08,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:08,732 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 20:02:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:02:08,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:08,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:08,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 20:02:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 20:02:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:02:08,797 INFO L87 Difference]: Start difference. First operand 11337 states and 15999 transitions. Second operand 4 states. [2018-10-26 20:02:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:12,667 INFO L93 Difference]: Finished difference Result 41584 states and 58255 transitions. [2018-10-26 20:02:12,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 20:02:12,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-10-26 20:02:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:12,742 INFO L225 Difference]: With dead ends: 41584 [2018-10-26 20:02:12,742 INFO L226 Difference]: Without dead ends: 30249 [2018-10-26 20:02:12,762 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 [2018-10-26 20:02:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30249 states. [2018-10-26 20:02:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30249 to 21129. [2018-10-26 20:02:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-26 20:02:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 28285 transitions. [2018-10-26 20:02:13,179 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 28285 transitions. Word has length 260 [2018-10-26 20:02:13,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:13,179 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 28285 transitions. [2018-10-26 20:02:13,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 20:02:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 28285 transitions. [2018-10-26 20:02:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-26 20:02:13,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:13,207 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:13,208 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:13,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1969755881, now seen corresponding path program 1 times [2018-10-26 20:02:13,208 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:13,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:13,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 20:02:13,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:13,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:13,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:02:13,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:02:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:02:13,351 INFO L87 Difference]: Start difference. First operand 21129 states and 28285 transitions. Second operand 3 states. [2018-10-26 20:02:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:15,273 INFO L93 Difference]: Finished difference Result 42264 states and 56582 transitions. [2018-10-26 20:02:15,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:02:15,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2018-10-26 20:02:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:15,314 INFO L225 Difference]: With dead ends: 42264 [2018-10-26 20:02:15,314 INFO L226 Difference]: Without dead ends: 21137 [2018-10-26 20:02:15,339 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 [2018-10-26 20:02:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2018-10-26 20:02:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 21129. [2018-10-26 20:02:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-26 20:02:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 25984 transitions. [2018-10-26 20:02:15,810 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 25984 transitions. Word has length 264 [2018-10-26 20:02:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:15,810 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 25984 transitions. [2018-10-26 20:02:15,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:02:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 25984 transitions. [2018-10-26 20:02:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-26 20:02:15,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:15,833 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:15,834 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:15,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash -362354461, now seen corresponding path program 1 times [2018-10-26 20:02:15,834 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:15,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:15,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:15,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:15,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:02:16,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:02:16,420 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 [2018-10-26 20:02:16,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:16,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:02:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 20:02:16,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 20:02:16,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-26 20:02:16,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:02:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:02:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:02:16,678 INFO L87 Difference]: Start difference. First operand 21129 states and 25984 transitions. Second operand 8 states. [2018-10-26 20:02:16,974 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-10-26 20:02:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:25,522 INFO L93 Difference]: Finished difference Result 125275 states and 151816 transitions. [2018-10-26 20:02:25,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 20:02:25,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 277 [2018-10-26 20:02:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:25,677 INFO L225 Difference]: With dead ends: 125275 [2018-10-26 20:02:25,677 INFO L226 Difference]: Without dead ends: 104148 [2018-10-26 20:02:25,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-26 20:02:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104148 states. [2018-10-26 20:02:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104148 to 61841. [2018-10-26 20:02:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61841 states. [2018-10-26 20:02:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61841 states to 61841 states and 73684 transitions. [2018-10-26 20:02:26,887 INFO L78 Accepts]: Start accepts. Automaton has 61841 states and 73684 transitions. Word has length 277 [2018-10-26 20:02:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:26,888 INFO L481 AbstractCegarLoop]: Abstraction has 61841 states and 73684 transitions. [2018-10-26 20:02:26,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:02:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 61841 states and 73684 transitions. [2018-10-26 20:02:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-26 20:02:26,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:26,935 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:26,935 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:26,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1772117421, now seen corresponding path program 1 times [2018-10-26 20:02:26,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:26,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:26,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:26,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:26,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-26 20:02:27,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:27,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:27,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 20:02:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 20:02:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:02:27,215 INFO L87 Difference]: Start difference. First operand 61841 states and 73684 transitions. Second operand 4 states. [2018-10-26 20:02:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:29,502 INFO L93 Difference]: Finished difference Result 121213 states and 144472 transitions. [2018-10-26 20:02:29,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 20:02:29,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 284 [2018-10-26 20:02:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:29,583 INFO L225 Difference]: With dead ends: 121213 [2018-10-26 20:02:29,583 INFO L226 Difference]: Without dead ends: 59374 [2018-10-26 20:02:29,627 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 [2018-10-26 20:02:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59374 states. [2018-10-26 20:02:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59374 to 59374. [2018-10-26 20:02:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59374 states. [2018-10-26 20:02:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59374 states to 59374 states and 67570 transitions. [2018-10-26 20:02:30,331 INFO L78 Accepts]: Start accepts. Automaton has 59374 states and 67570 transitions. Word has length 284 [2018-10-26 20:02:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:30,331 INFO L481 AbstractCegarLoop]: Abstraction has 59374 states and 67570 transitions. [2018-10-26 20:02:30,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 20:02:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 59374 states and 67570 transitions. [2018-10-26 20:02:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-26 20:02:30,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:30,409 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 20:02:30,409 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:30,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1024180898, now seen corresponding path program 1 times [2018-10-26 20:02:30,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:30,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:30,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-26 20:02:30,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:30,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 20:02:30,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:02:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:02:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:02:30,823 INFO L87 Difference]: Start difference. First operand 59374 states and 67570 transitions. Second operand 5 states. [2018-10-26 20:02:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:35,083 INFO L93 Difference]: Finished difference Result 280787 states and 319554 transitions. [2018-10-26 20:02:35,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:02:35,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 350 [2018-10-26 20:02:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:35,365 INFO L225 Difference]: With dead ends: 280787 [2018-10-26 20:02:35,366 INFO L226 Difference]: Without dead ends: 221415 [2018-10-26 20:02:35,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:02:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221415 states. [2018-10-26 20:02:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221415 to 164304. [2018-10-26 20:02:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164304 states. [2018-10-26 20:02:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164304 states to 164304 states and 186644 transitions. [2018-10-26 20:02:38,696 INFO L78 Accepts]: Start accepts. Automaton has 164304 states and 186644 transitions. Word has length 350 [2018-10-26 20:02:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:38,696 INFO L481 AbstractCegarLoop]: Abstraction has 164304 states and 186644 transitions. [2018-10-26 20:02:38,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:02:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 164304 states and 186644 transitions. [2018-10-26 20:02:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-10-26 20:02:38,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:38,730 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:38,730 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:38,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash -171426146, now seen corresponding path program 1 times [2018-10-26 20:02:38,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:38,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:38,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:38,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:38,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-26 20:02:39,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:39,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:39,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 20:02:39,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 20:02:39,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 20:02:39,108 INFO L87 Difference]: Start difference. First operand 164304 states and 186644 transitions. Second operand 4 states. [2018-10-26 20:02:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:42,169 INFO L93 Difference]: Finished difference Result 392941 states and 444718 transitions. [2018-10-26 20:02:42,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 20:02:42,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 379 [2018-10-26 20:02:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:42,437 INFO L225 Difference]: With dead ends: 392941 [2018-10-26 20:02:42,437 INFO L226 Difference]: Without dead ends: 228639 [2018-10-26 20:02:42,542 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 [2018-10-26 20:02:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228639 states. [2018-10-26 20:02:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228639 to 223663. [2018-10-26 20:02:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223663 states. [2018-10-26 20:02:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223663 states to 223663 states and 249327 transitions. [2018-10-26 20:02:46,494 INFO L78 Accepts]: Start accepts. Automaton has 223663 states and 249327 transitions. Word has length 379 [2018-10-26 20:02:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:02:46,495 INFO L481 AbstractCegarLoop]: Abstraction has 223663 states and 249327 transitions. [2018-10-26 20:02:46,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 20:02:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 223663 states and 249327 transitions. [2018-10-26 20:02:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-10-26 20:02:46,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:02:46,546 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:02:46,546 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:02:46,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:02:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 735935972, now seen corresponding path program 1 times [2018-10-26 20:02:46,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:02:46,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:02:46,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:46,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:02:46,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:02:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:02:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-26 20:02:46,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:02:46,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 20:02:46,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 20:02:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 20:02:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:02:46,928 INFO L87 Difference]: Start difference. First operand 223663 states and 249327 transitions. Second operand 3 states. [2018-10-26 20:02:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:02:51,936 INFO L93 Difference]: Finished difference Result 616140 states and 684361 transitions. [2018-10-26 20:02:51,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 20:02:51,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2018-10-26 20:02:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:02:52,550 INFO L225 Difference]: With dead ends: 616140 [2018-10-26 20:02:52,550 INFO L226 Difference]: Without dead ends: 392479 [2018-10-26 20:02:52,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 20:02:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392479 states. [2018-10-26 20:03:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392479 to 392479. [2018-10-26 20:03:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392479 states. [2018-10-26 20:03:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392479 states to 392479 states and 432912 transitions. [2018-10-26 20:03:05,300 INFO L78 Accepts]: Start accepts. Automaton has 392479 states and 432912 transitions. Word has length 429 [2018-10-26 20:03:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:03:05,301 INFO L481 AbstractCegarLoop]: Abstraction has 392479 states and 432912 transitions. [2018-10-26 20:03:05,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 20:03:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 392479 states and 432912 transitions. [2018-10-26 20:03:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-10-26 20:03:05,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:03:05,355 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:03:05,355 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:03:05,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:03:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1312779096, now seen corresponding path program 1 times [2018-10-26 20:03:05,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:03:05,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:03:05,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:03:05,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:03:05,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:03:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:03:05,811 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 20:03:05,999 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 20:03:06,239 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 20:03:06,467 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 20:03:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 328 proven. 29 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-26 20:03:07,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:03:07,185 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 [2018-10-26 20:03:08,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:03:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:03:08,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:03:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 247 proven. 106 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-26 20:03:08,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:03:08,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2018-10-26 20:03:08,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 20:03:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 20:03:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:03:08,709 INFO L87 Difference]: Start difference. First operand 392479 states and 432912 transitions. Second operand 12 states. [2018-10-26 20:03:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:03:44,064 INFO L93 Difference]: Finished difference Result 3124279 states and 3438721 transitions. [2018-10-26 20:03:44,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 20:03:44,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 431 [2018-10-26 20:03:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:03:49,396 INFO L225 Difference]: With dead ends: 3124279 [2018-10-26 20:03:49,396 INFO L226 Difference]: Without dead ends: 2731802 [2018-10-26 20:03:50,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 20:03:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731802 states.